From bea89e2a80b26df6b7211ac028bba545e3cd0e62 Mon Sep 17 00:00:00 2001 From: pk Date: Thu, 1 Sep 2022 22:44:20 +0200 Subject: [PATCH] Support watching for modified npm packages Allow array of build configs. --- .gitignore | 2 + go.mod | 13 +- go.sum | 23 +- linker.go | 123 + main.go | 197 +- vendor/github.com/evanw/esbuild/LICENSE.md | 21 - .../esbuild/internal/api_helpers/use_timer.go | 7 - .../evanw/esbuild/internal/ast/ast.go | 141 - .../evanw/esbuild/internal/bundler/bundler.go | 2373 --- .../evanw/esbuild/internal/bundler/debug.go | 132 - .../evanw/esbuild/internal/bundler/linker.go | 5581 ------ .../evanw/esbuild/internal/cache/cache.go | 101 - .../evanw/esbuild/internal/cache/cache_ast.go | 190 - .../evanw/esbuild/internal/cache/cache_fs.go | 52 - .../evanw/esbuild/internal/compat/compat.go | 45 - .../esbuild/internal/compat/css_table.go | 72 - .../evanw/esbuild/internal/compat/js_table.go | 465 - .../evanw/esbuild/internal/config/config.go | 583 - 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github.com/trading-peter/gowebbuild -go 1.17 +go 1.18 require ( - github.com/evanw/esbuild v0.14.5 - github.com/goyek/goyek v0.6.0 + github.com/evanw/esbuild v0.14.50 + github.com/goyek/goyek v0.6.3 github.com/jaschaephraim/lrserver v0.0.0-20171129202958-50d19f603f71 github.com/otiai10/copy v1.7.0 github.com/radovskyb/watcher v1.0.7 + github.com/tidwall/gjson v1.14.1 ) require ( - github.com/gorilla/websocket v1.4.2 // indirect + github.com/gorilla/websocket v1.5.0 // indirect github.com/smartystreets/goconvey v1.7.2 // indirect - golang.org/x/sys v0.0.0-20210908233432-aa78b53d3365 // indirect + github.com/tidwall/match v1.1.1 // indirect + github.com/tidwall/pretty v1.2.0 // indirect + golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 // indirect gopkg.in/fsnotify.v1 v1.4.7 // indirect ) diff --git a/go.sum b/go.sum index 5cc5c00..837310f 100644 --- a/go.sum +++ b/go.sum @@ -1,11 +1,11 @@ -github.com/evanw/esbuild v0.14.5 h1:Gh/vGvDL/g++7erzQZofohZqFBzQblWfLdtYCf15zcQ= -github.com/evanw/esbuild v0.14.5/go.mod h1:GG+zjdi59yh3ehDn4ZWfPcATxjPDUH53iU4ZJbp7dkY= +github.com/evanw/esbuild v0.14.50 h1:h7sijkRPGB9ckpIOc6FMZ81/NMy/4g40LhsBAtPa3/I= +github.com/evanw/esbuild v0.14.50/go.mod h1:dkwI35DCMf0iR+tJDiCEiPKZ4A+AotmmeLpPEv3dl9k= github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8= github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY= -github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc= -github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE= -github.com/goyek/goyek v0.6.0 h1:2YQ4V3X7q+zFF98IBWMc1WRwfzs0TQ8jrwOKY3XRQRk= -github.com/goyek/goyek v0.6.0/go.mod h1:UGjZz3juJL2l2eMqRbxQYjG8ieyKb7WMYPv0KB0KVxA= +github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc= +github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE= +github.com/goyek/goyek v0.6.3 h1:t0h3gWdlvGeSChltiyAyka9Mlcp3CEPDRssRf0XHDTM= +github.com/goyek/goyek v0.6.3/go.mod h1:UGjZz3juJL2l2eMqRbxQYjG8ieyKb7WMYPv0KB0KVxA= github.com/jaschaephraim/lrserver v0.0.0-20171129202958-50d19f603f71 h1:24NdJ5N6gtrcoeS4JwLMeruKFmg20QdF/5UnX5S/j18= github.com/jaschaephraim/lrserver v0.0.0-20171129202958-50d19f603f71/go.mod h1:ozZLfjiLmXytkIUh200wMeuoQJ4ww06wN+KZtFP6j3g= github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo= @@ -23,11 +23,18 @@ github.com/smartystreets/assertions v1.2.0 h1:42S6lae5dvLc7BrLu/0ugRtcFVjoJNMC/N github.com/smartystreets/assertions v1.2.0/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo= github.com/smartystreets/goconvey v1.7.2 h1:9RBaZCeXEQ3UselpuwUQHltGVXvdwm6cv1hgR6gDIPg= github.com/smartystreets/goconvey v1.7.2/go.mod h1:Vw0tHAZW6lzCRk3xgdin6fKYcG+G3Pg9vgXWeJpQFMM= +github.com/tidwall/gjson v1.14.1 h1:iymTbGkQBhveq21bEvAQ81I0LEBork8BFe1CUZXdyuo= +github.com/tidwall/gjson v1.14.1/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk= +github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA= +github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM= +github.com/tidwall/pretty v1.2.0 h1:RWIZEg2iJ8/g6fDDYzMpobmaoGh5OLl4AXtGUGPcqCs= +github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU= golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= -golang.org/x/sys v0.0.0-20210908233432-aa78b53d3365 h1:6wSTsvPddg9gc/mVEEyk9oOAoxn+bT4Z9q1zx+4RwA4= -golang.org/x/sys v0.0.0-20210908233432-aa78b53d3365/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 h1:WIoqL4EROvwiPdUtaip4VcDdpZ4kha7wBWZrbVKCIZg= +golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4= diff --git a/linker.go b/linker.go new file mode 100644 index 0000000..128ddee --- /dev/null +++ b/linker.go @@ -0,0 +1,123 @@ +package main + +import ( + "fmt" + "io/fs" + "os" + "path/filepath" + "strings" + "time" + + "github.com/otiai10/copy" + "github.com/radovskyb/watcher" + "github.com/tidwall/gjson" +) + +func link(from, to string) chan struct{} { + requestBuildCh := make(chan struct{}) + + // Load package.json in destination. + destPkg := readFileContent(filepath.Join(to, "package.json")) + depsRaw := gjson.Get(destPkg, "dependencies").Map() + deps := map[string]bool{} + for k := range depsRaw { + deps[k] = true + } + + packages := map[string]string{} + packageFiles := findFiles(from, "package.json") + + for i := range packageFiles { + content := readFileContent(packageFiles[i]) + name := gjson.Get(content, "name").String() + + if deps[name] { + packages[name] = filepath.Dir(packageFiles[i]) + } + } + + go func() { + w := watcher.New() + w.SetMaxEvents(1) + w.FilterOps(watcher.Write, watcher.Rename, watcher.Move, watcher.Create, watcher.Remove) + + if err := w.AddRecursive(from); err != nil { + fmt.Println(err.Error()) + os.Exit(1) + } + + go func() { + for { + select { + case event := <-w.Event: + fmt.Printf("File %s changed\n", event.Path) + for k, v := range packages { + if strings.HasPrefix(event.Path, v) { + src := filepath.Dir(event.Path) + dest := filepath.Join(to, "node_modules", k) + fmt.Printf("Copying %s to %s\n", src, dest) + err := copy.Copy(src, dest, copy.Options{ + Skip: func(src string) (bool, error) { + ok, _ := filepath.Match("*.js", filepath.Base(src)) + if ok && !strings.Contains(src, "node_modules") { + return false, nil + } + + return true, nil + }, + Sync: true, + }) + + if err != nil { + fmt.Printf("Failed to copy %s: %v\n", k, err) + } + + requestBuildCh <- struct{}{} + } + } + case err := <-w.Error: + fmt.Println(err.Error()) + case <-w.Closed: + return + } + } + }() + + fmt.Printf("Watching packages in %s\n", from) + + if err := w.Start(time.Millisecond * 100); err != nil { + fmt.Println(err.Error()) + } + }() + + return requestBuildCh +} + +func findFiles(root, name string) []string { + paths := []string{} + + filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error { + if err != nil { + return nil + } + + if !d.IsDir() && filepath.Base(path) == name && !strings.Contains(path, "node_modules") { + paths = append(paths, path) + } + + return nil + }) + + return paths +} + +func readFileContent(path string) string { + pkgData, err := os.ReadFile(path) + + if err != nil { + fmt.Printf("%+v\n", err) + os.Exit(1) + } + + return string(pkgData) +} diff --git a/main.go b/main.go index 1acdec8..0c2a925 100644 --- a/main.go +++ b/main.go @@ -41,11 +41,39 @@ type options struct { Search string Replace string } + Link struct { + From string + To string + } +} + +func readCfg(cfgPath string) []options { + cfgContent, err := os.ReadFile(cfgPath) + + if err != nil { + fmt.Printf("%+v\n", err) + os.Exit(1) + } + + optsSetups := []options{} + + err = json.Unmarshal(cfgContent, &optsSetups) + if err != nil { + opt := options{} + err = json.Unmarshal(cfgContent, &opt) + if err != nil { + fmt.Printf("%+v\n", err) + os.Exit(1) + } + + optsSetups = append(optsSetups, opt) + } + + return optsSetups } func main() { flow := &goyek.Flow{} - opts := options{} cfgPathParam := flow.RegisterStringParam(goyek.StringParam{ Name: "c", @@ -65,30 +93,22 @@ func main() { Params: goyek.Params{cfgPathParam, prodParam}, Action: func(tf *goyek.TF) { cfgPath := cfgPathParam.Get(tf) - cfgContent, err := os.ReadFile(cfgPath) + os.Chdir(filepath.Dir(cfgPath)) + opts := readCfg(cfgPath) - if err != nil { - fmt.Printf("%+v\n", err) - os.Exit(1) + for _, o := range opts { + cp(o) + + if prodParam.Get(tf) { + o.ESBuild.MinifyIdentifiers = true + o.ESBuild.MinifySyntax = true + o.ESBuild.MinifyWhitespace = true + o.ESBuild.Sourcemap = api.SourceMapNone + } + + api.Build(o.ESBuild) + replace(o) } - - err = json.Unmarshal(cfgContent, &opts) - if err != nil { - fmt.Printf("%+v\n", err) - os.Exit(1) - } - - cp(opts) - - if prodParam.Get(tf) { - opts.ESBuild.MinifyIdentifiers = true - opts.ESBuild.MinifySyntax = true - opts.ESBuild.MinifyWhitespace = true - opts.ESBuild.Sourcemap = api.SourceMapNone - } - - api.Build(opts.ESBuild) - replace(opts) }, } @@ -98,66 +118,90 @@ func main() { Params: goyek.Params{cfgPathParam}, Action: func(tf *goyek.TF) { cfgPath := cfgPathParam.Get(tf) - cfgContent, err := os.ReadFile(cfgPath) - - if err != nil { - fmt.Printf("%+v\n", err) - os.Exit(1) - } - - err = json.Unmarshal(cfgContent, &opts) - if err != nil { - fmt.Printf("%+v\n", err) - os.Exit(1) - } + os.Chdir(filepath.Dir(cfgPath)) + optsSetups := readCfg(cfgPath) c := make(chan os.Signal, 1) signal.Notify(c, os.Interrupt, syscall.SIGTERM) - fmt.Println("Starting live reload server") + for i := range optsSetups { + opts := optsSetups[i] - go func() { - w := watcher.New() - w.SetMaxEvents(1) - w.FilterOps(watcher.Write, watcher.Rename, watcher.Move, watcher.Create, watcher.Remove) + go func(opts options) { + w := watcher.New() + w.SetMaxEvents(1) + w.FilterOps(watcher.Write, watcher.Rename, watcher.Move, watcher.Create, watcher.Remove) - if len(opts.Watch.Exclude) > 0 { - w.Ignore(opts.Watch.Exclude...) + if len(opts.Watch.Exclude) > 0 { + w.Ignore(opts.Watch.Exclude...) + } + + if err := w.AddRecursive(opts.Watch.Path); err != nil { + fmt.Println(err.Error()) + os.Exit(1) + } + + go func() { + for { + select { + case event := <-w.Event: + fmt.Printf("File %s changed\n", event.Name()) + cp(opts) + build(opts) + replace(opts) + case err := <-w.Error: + fmt.Println(err.Error()) + case <-w.Closed: + return + } + } + }() + + fmt.Printf("Watching %d elements in %s\n", len(w.WatchedFiles()), opts.Watch.Path) + + cp(opts) + build(opts) + replace(opts) + + if err := w.Start(time.Millisecond * 100); err != nil { + fmt.Println(err.Error()) + } + }(opts) + + if opts.Serve.Path != "" { + go func() { + port := 8888 + if opts.Serve.Port != 0 { + port = opts.Serve.Port + } + + http.Handle("/", http.FileServer(http.Dir(opts.Serve.Path))) + + fmt.Printf("Serving contents of %s at :%d\n", opts.Serve.Path, port) + err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil) + + if err != nil { + fmt.Printf("%+v\n", err.Error()) + os.Exit(1) + } + }() } - if err := w.AddRecursive(opts.Watch.Path); err != nil { - fmt.Println(err.Error()) - os.Exit(1) - } + if opts.Link.From != "" { + reqBuildCh := link(opts.Link.From, opts.Link.To) - go func() { - for { - select { - case event := <-w.Event: - fmt.Printf("File %s changed\n", event.Name()) + go func() { + for range reqBuildCh { cp(opts) build(opts) replace(opts) - case err := <-w.Error: - fmt.Println(err.Error()) - case <-w.Closed: - return } - } - }() - - fmt.Printf("Watching %d elements in %s\n", len(w.WatchedFiles()), opts.Watch.Path) - - cp(opts) - build(opts) - replace(opts) - - if err := w.Start(time.Millisecond * 100); err != nil { - fmt.Println(err.Error()) + }() } - }() + } go func() { + fmt.Println("Starting live reload server") lr := lrserver.New(lrserver.DefaultName, lrserver.DefaultPort) go func() { @@ -174,25 +218,6 @@ func main() { } }() - if opts.Serve.Path != "" { - go func() { - port := 8888 - if opts.Serve.Port != 0 { - port = opts.Serve.Port - } - - http.Handle("/", http.FileServer(http.Dir(opts.Serve.Path))) - - fmt.Printf("Serving contents of %s at :%d\n", opts.Serve.Path, port) - err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil) - - if err != nil { - fmt.Printf("%+v\n", err.Error()) - os.Exit(1) - } - }() - } - <-c fmt.Println("\nExit") os.Exit(0) diff --git a/vendor/github.com/evanw/esbuild/LICENSE.md b/vendor/github.com/evanw/esbuild/LICENSE.md deleted file mode 100644 index 2027e8d..0000000 --- a/vendor/github.com/evanw/esbuild/LICENSE.md +++ /dev/null @@ -1,21 +0,0 @@ -MIT License - -Copyright (c) 2020 Evan Wallace - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. diff --git a/vendor/github.com/evanw/esbuild/internal/api_helpers/use_timer.go b/vendor/github.com/evanw/esbuild/internal/api_helpers/use_timer.go deleted file mode 100644 index 3b36fe2..0000000 --- a/vendor/github.com/evanw/esbuild/internal/api_helpers/use_timer.go +++ /dev/null @@ -1,7 +0,0 @@ -package api_helpers - -// This flag is set by the CLI to activate the timer. It's put here instead of -// by the timer to discourage code from checking this flag. Only the code that -// creates the root timer should check this flag. Other code should check that -// the timer is not null to detect if the timer is being used or not. -var UseTimer bool diff --git a/vendor/github.com/evanw/esbuild/internal/ast/ast.go b/vendor/github.com/evanw/esbuild/internal/ast/ast.go deleted file mode 100644 index f909468..0000000 --- a/vendor/github.com/evanw/esbuild/internal/ast/ast.go +++ /dev/null @@ -1,141 +0,0 @@ -package ast - -import "github.com/evanw/esbuild/internal/logger" - -// This file contains data structures that are used with the AST packages for -// both JavaScript and CSS. This helps the bundler treat both AST formats in -// a somewhat format-agnostic manner. - -type ImportKind uint8 - -const ( - // An entry point provided by the user - ImportEntryPoint ImportKind = iota - - // An ES6 import or re-export statement - ImportStmt - - // A call to "require()" - ImportRequire - - // An "import()" expression with a string argument - ImportDynamic - - // A call to "require.resolve()" - ImportRequireResolve - - // A CSS "@import" rule - ImportAt - - // A CSS "@import" rule with import conditions - ImportAtConditional - - // A CSS "url(...)" token - ImportURL -) - -func (kind ImportKind) StringForMetafile() string { - switch kind { - case ImportStmt: - return "import-statement" - case ImportRequire: - return "require-call" - case ImportDynamic: - return "dynamic-import" - case ImportRequireResolve: - return "require-resolve" - case ImportAt, ImportAtConditional: - return "import-rule" - case ImportURL: - return "url-token" - case ImportEntryPoint: - return "entry-point" - default: - panic("Internal error") - } -} - -func (kind ImportKind) IsFromCSS() bool { - return kind == ImportAt || kind == ImportURL -} - -type ImportRecord struct { - Range logger.Range - Path logger.Path - Assertions *[]AssertEntry - - // The resolved source index for an internal import (within the bundle) or - // nil for an external import (not included in the bundle) - SourceIndex Index32 - - // Sometimes the parser creates an import record and decides it isn't needed. - // For example, TypeScript code may have import statements that later turn - // out to be type-only imports after analyzing the whole file. - IsUnused bool - - // If this is true, the import contains syntax like "* as ns". This is used - // to determine whether modules that have no exports need to be wrapped in a - // CommonJS wrapper or not. - ContainsImportStar bool - - // If this is true, the import contains an import for the alias "default", - // either via the "import x from" or "import {default as x} from" syntax. - ContainsDefaultAlias bool - - // If true, this "export * from 'path'" statement is evaluated at run-time by - // calling the "__reExport()" helper function - CallsRunTimeReExportFn bool - - // Tell the printer to wrap this call to "require()" in "__toESM(...)" - WrapWithToESM bool - - // Tell the printer to wrap this ESM exports object in "__toCJS(...)" - WrapWithToCJS bool - - // Tell the printer to use the runtime "__require()" instead of "require()" - CallRuntimeRequire bool - - // True for the following cases: - // - // try { require('x') } catch { handle } - // try { await import('x') } catch { handle } - // try { require.resolve('x') } catch { handle } - // import('x').catch(handle) - // import('x').then(_, handle) - // - // In these cases we shouldn't generate an error if the path could not be - // resolved. - HandlesImportErrors bool - - // If true, this was originally written as a bare "import 'file'" statement - WasOriginallyBareImport bool - - Kind ImportKind -} - -type AssertEntry struct { - Key []uint16 // An identifier or a string - Value []uint16 // Always a string - KeyLoc logger.Loc - ValueLoc logger.Loc - PreferQuotedKey bool -} - -// This stores a 32-bit index where the zero value is an invalid index. This is -// a better alternative to storing the index as a pointer since that has the -// same properties but takes up more space and costs an extra pointer traversal. -type Index32 struct { - flippedBits uint32 -} - -func MakeIndex32(index uint32) Index32 { - return Index32{flippedBits: ^index} -} - -func (i Index32) IsValid() bool { - return i.flippedBits != 0 -} - -func (i Index32) GetIndex() uint32 { - return ^i.flippedBits -} diff --git a/vendor/github.com/evanw/esbuild/internal/bundler/bundler.go b/vendor/github.com/evanw/esbuild/internal/bundler/bundler.go deleted file mode 100644 index b42a2e1..0000000 --- a/vendor/github.com/evanw/esbuild/internal/bundler/bundler.go +++ /dev/null @@ -1,2373 +0,0 @@ -package bundler - -import ( - "bytes" - "encoding/base32" - "encoding/base64" - "fmt" - "math/rand" - "net/http" - "sort" - "strings" - "sync" - "syscall" - "time" - "unicode" - "unicode/utf8" - - "github.com/evanw/esbuild/internal/ast" - "github.com/evanw/esbuild/internal/cache" - "github.com/evanw/esbuild/internal/compat" - "github.com/evanw/esbuild/internal/config" - "github.com/evanw/esbuild/internal/css_parser" - "github.com/evanw/esbuild/internal/fs" - "github.com/evanw/esbuild/internal/graph" - "github.com/evanw/esbuild/internal/helpers" - "github.com/evanw/esbuild/internal/js_ast" - "github.com/evanw/esbuild/internal/js_lexer" - "github.com/evanw/esbuild/internal/js_parser" - "github.com/evanw/esbuild/internal/js_printer" - "github.com/evanw/esbuild/internal/logger" - "github.com/evanw/esbuild/internal/resolver" - "github.com/evanw/esbuild/internal/runtime" - "github.com/evanw/esbuild/internal/sourcemap" - "github.com/evanw/esbuild/internal/xxhash" -) - -type scannerFile struct { - inputFile graph.InputFile - pluginData interface{} - - // If "AbsMetadataFile" is present, this will be filled out with information - // about this file in JSON format. This is a partial JSON file that will be - // fully assembled later. - jsonMetadataChunk string -} - -// This is data related to source maps. It's computed in parallel with linking -// and must be ready by the time printing happens. This is beneficial because -// it is somewhat expensive to produce. -type dataForSourceMap struct { - // This data is for the printer. It maps from byte offsets in the file (which - // are stored at every AST node) to UTF-16 column offsets (required by source - // maps). - lineOffsetTables []sourcemap.LineOffsetTable - - // This contains the quoted contents of the original source file. It's what - // needs to be embedded in the "sourcesContent" array in the final source - // map. Quoting is precomputed because it's somewhat expensive. - quotedContents [][]byte -} - -type Bundle struct { - fs fs.FS - res resolver.Resolver - files []scannerFile - entryPoints []graph.EntryPoint - - // The unique key prefix is a random string that is unique to every bundling - // operation. It is used as a prefix for the unique keys assigned to every - // chunk during linking. These unique keys are used to identify each chunk - // before the final output paths have been computed. - uniqueKeyPrefix string -} - -type parseArgs struct { - fs fs.FS - log logger.Log - res resolver.Resolver - caches *cache.CacheSet - keyPath logger.Path - prettyPath string - sourceIndex uint32 - importSource *logger.Source - sideEffects graph.SideEffects - importPathRange logger.Range - pluginData interface{} - options config.Options - results chan parseResult - inject chan config.InjectedFile - skipResolve bool - uniqueKeyPrefix string -} - -type parseResult struct { - file scannerFile - resolveResults []*resolver.ResolveResult - tlaCheck tlaCheck - ok bool -} - -type tlaCheck struct { - parent ast.Index32 - depth uint32 - importRecordIndex uint32 -} - -func parseFile(args parseArgs) { - source := logger.Source{ - Index: args.sourceIndex, - KeyPath: args.keyPath, - PrettyPath: args.prettyPath, - IdentifierName: js_ast.GenerateNonUniqueNameFromPath(args.keyPath.Text), - } - - var loader config.Loader - var absResolveDir string - var pluginName string - var pluginData interface{} - - if stdin := args.options.Stdin; stdin != nil { - // Special-case stdin - source.Contents = stdin.Contents - loader = stdin.Loader - if loader == config.LoaderNone { - loader = config.LoaderJS - } - absResolveDir = args.options.Stdin.AbsResolveDir - } else { - result, ok := runOnLoadPlugins( - args.options.Plugins, - args.res, - args.fs, - &args.caches.FSCache, - args.log, - &source, - args.importSource, - args.importPathRange, - args.pluginData, - args.options.WatchMode, - ) - if !ok { - if args.inject != nil { - args.inject <- config.InjectedFile{ - Source: source, - } - } - args.results <- parseResult{} - return - } - loader = result.loader - absResolveDir = result.absResolveDir - pluginName = result.pluginName - pluginData = result.pluginData - } - - _, base, ext := logger.PlatformIndependentPathDirBaseExt(source.KeyPath.Text) - - // The special "default" loader determines the loader from the file path - if loader == config.LoaderDefault { - loader = loaderFromFileExtension(args.options.ExtensionToLoader, base+ext) - } - - result := parseResult{ - file: scannerFile{ - inputFile: graph.InputFile{ - Source: source, - Loader: loader, - SideEffects: args.sideEffects, - }, - pluginData: pluginData, - }, - } - - defer func() { - r := recover() - if r != nil { - args.log.AddWithNotes(logger.Error, nil, logger.Range{}, - fmt.Sprintf("panic: %v (while parsing %q)", r, source.PrettyPath), - []logger.MsgData{{Text: helpers.PrettyPrintedStack()}}) - args.results <- result - } - }() - - switch loader { - case config.LoaderJS: - ast, ok := args.caches.JSCache.Parse(args.log, source, js_parser.OptionsFromConfig(&args.options)) - if len(ast.Parts) <= 1 { // Ignore the implicitly-generated namespace export part - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_EmptyAST - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = ok - - case config.LoaderJSX: - args.options.JSX.Parse = true - ast, ok := args.caches.JSCache.Parse(args.log, source, js_parser.OptionsFromConfig(&args.options)) - if len(ast.Parts) <= 1 { // Ignore the implicitly-generated namespace export part - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_EmptyAST - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = ok - - case config.LoaderTS, config.LoaderTSNoAmbiguousLessThan: - args.options.TS.Parse = true - args.options.TS.NoAmbiguousLessThan = loader == config.LoaderTSNoAmbiguousLessThan - ast, ok := args.caches.JSCache.Parse(args.log, source, js_parser.OptionsFromConfig(&args.options)) - if len(ast.Parts) <= 1 { // Ignore the implicitly-generated namespace export part - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_EmptyAST - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = ok - - case config.LoaderTSX: - args.options.TS.Parse = true - args.options.JSX.Parse = true - ast, ok := args.caches.JSCache.Parse(args.log, source, js_parser.OptionsFromConfig(&args.options)) - if len(ast.Parts) <= 1 { // Ignore the implicitly-generated namespace export part - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_EmptyAST - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = ok - - case config.LoaderCSS: - ast := args.caches.CSSCache.Parse(args.log, source, css_parser.Options{ - MangleSyntax: args.options.MangleSyntax, - RemoveWhitespace: args.options.RemoveWhitespace, - UnsupportedCSSFeatures: args.options.UnsupportedCSSFeatures, - }) - result.file.inputFile.Repr = &graph.CSSRepr{AST: ast} - result.ok = true - - case config.LoaderJSON: - expr, ok := args.caches.JSONCache.Parse(args.log, source, js_parser.JSONOptions{}) - ast := js_parser.LazyExportAST(args.log, source, js_parser.OptionsFromConfig(&args.options), expr, "") - if pluginName != "" { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData_FromPlugin - } else { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = ok - - case config.LoaderText: - encoded := base64.StdEncoding.EncodeToString([]byte(source.Contents)) - expr := js_ast.Expr{Data: &js_ast.EString{Value: js_lexer.StringToUTF16(source.Contents)}} - ast := js_parser.LazyExportAST(args.log, source, js_parser.OptionsFromConfig(&args.options), expr, "") - ast.URLForCSS = "data:text/plain;base64," + encoded - if pluginName != "" { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData_FromPlugin - } else { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = true - - case config.LoaderBase64: - mimeType := guessMimeType(ext, source.Contents) - encoded := base64.StdEncoding.EncodeToString([]byte(source.Contents)) - expr := js_ast.Expr{Data: &js_ast.EString{Value: js_lexer.StringToUTF16(encoded)}} - ast := js_parser.LazyExportAST(args.log, source, js_parser.OptionsFromConfig(&args.options), expr, "") - ast.URLForCSS = "data:" + mimeType + ";base64," + encoded - if pluginName != "" { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData_FromPlugin - } else { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = true - - case config.LoaderBinary: - encoded := base64.StdEncoding.EncodeToString([]byte(source.Contents)) - expr := js_ast.Expr{Data: &js_ast.EString{Value: js_lexer.StringToUTF16(encoded)}} - helper := "__toBinary" - if args.options.Platform == config.PlatformNode { - helper = "__toBinaryNode" - } - ast := js_parser.LazyExportAST(args.log, source, js_parser.OptionsFromConfig(&args.options), expr, helper) - ast.URLForCSS = "data:application/octet-stream;base64," + encoded - if pluginName != "" { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData_FromPlugin - } else { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = true - - case config.LoaderDataURL: - mimeType := guessMimeType(ext, source.Contents) - encoded := base64.StdEncoding.EncodeToString([]byte(source.Contents)) - url := fmt.Sprintf("data:%s;base64,%s", mimeType, encoded) - expr := js_ast.Expr{Data: &js_ast.EString{Value: js_lexer.StringToUTF16(url)}} - ast := js_parser.LazyExportAST(args.log, source, js_parser.OptionsFromConfig(&args.options), expr, "") - ast.URLForCSS = url - if pluginName != "" { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData_FromPlugin - } else { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = true - - case config.LoaderFile: - uniqueKey := fmt.Sprintf("%sA%08d", args.uniqueKeyPrefix, args.sourceIndex) - uniqueKeyPath := uniqueKey + source.KeyPath.IgnoredSuffix - expr := js_ast.Expr{Data: &js_ast.EString{Value: js_lexer.StringToUTF16(uniqueKeyPath)}} - ast := js_parser.LazyExportAST(args.log, source, js_parser.OptionsFromConfig(&args.options), expr, "") - ast.URLForCSS = uniqueKeyPath - if pluginName != "" { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData_FromPlugin - } else { - result.file.inputFile.SideEffects.Kind = graph.NoSideEffects_PureData - } - result.file.inputFile.Repr = &graph.JSRepr{AST: ast} - result.ok = true - - // Mark that this file is from the "file" loader - result.file.inputFile.UniqueKeyForFileLoader = uniqueKey - - default: - var message string - if source.KeyPath.Namespace == "file" && ext != "" { - message = fmt.Sprintf("No loader is configured for %q files: %s", ext, source.PrettyPath) - } else { - message = fmt.Sprintf("Do not know how to load path: %s", source.PrettyPath) - } - tracker := logger.MakeLineColumnTracker(args.importSource) - args.log.Add(logger.Error, &tracker, args.importPathRange, message) - } - - // This must come before we send on the "results" channel to avoid deadlock - if args.inject != nil { - var exports []config.InjectableExport - if repr, ok := result.file.inputFile.Repr.(*graph.JSRepr); ok { - aliases := make([]string, 0, len(repr.AST.NamedExports)) - for alias := range repr.AST.NamedExports { - aliases = append(aliases, alias) - } - sort.Strings(aliases) // Sort for determinism - exports = make([]config.InjectableExport, len(aliases)) - for i, alias := range aliases { - exports[i] = config.InjectableExport{ - Alias: alias, - Loc: repr.AST.NamedExports[alias].AliasLoc, - } - } - } - args.inject <- config.InjectedFile{ - Source: source, - Exports: exports, - } - } - - // Stop now if parsing failed - if !result.ok { - args.results <- result - return - } - - // Run the resolver on the parse thread so it's not run on the main thread. - // That way the main thread isn't blocked if the resolver takes a while. - if args.options.Mode == config.ModeBundle && !args.skipResolve { - // Clone the import records because they will be mutated later - recordsPtr := result.file.inputFile.Repr.ImportRecords() - records := append([]ast.ImportRecord{}, *recordsPtr...) - *recordsPtr = records - result.resolveResults = make([]*resolver.ResolveResult, len(records)) - - if len(records) > 0 { - resolverCache := make(map[ast.ImportKind]map[string]*resolver.ResolveResult) - tracker := logger.MakeLineColumnTracker(&source) - - for importRecordIndex := range records { - // Don't try to resolve imports that are already resolved - record := &records[importRecordIndex] - if record.SourceIndex.IsValid() { - continue - } - - // Ignore records that the parser has discarded. This is used to remove - // type-only imports in TypeScript files. - if record.IsUnused { - continue - } - - // Cache the path in case it's imported multiple times in this file - cache, ok := resolverCache[record.Kind] - if !ok { - cache = make(map[string]*resolver.ResolveResult) - resolverCache[record.Kind] = cache - } - if resolveResult, ok := cache[record.Path.Text]; ok { - result.resolveResults[importRecordIndex] = resolveResult - continue - } - - // Run the resolver and log an error if the path couldn't be resolved - resolveResult, didLogError, debug := runOnResolvePlugins( - args.options.Plugins, - args.res, - args.log, - args.fs, - &args.caches.FSCache, - &source, - record.Range, - source.KeyPath.Namespace, - record.Path.Text, - record.Kind, - absResolveDir, - pluginData, - ) - cache[record.Path.Text] = resolveResult - - // All "require.resolve()" imports should be external because we don't - // want to waste effort traversing into them - if record.Kind == ast.ImportRequireResolve { - if resolveResult != nil && resolveResult.IsExternal { - // Allow path substitution as long as the result is external - result.resolveResults[importRecordIndex] = resolveResult - } else if !record.HandlesImportErrors { - args.log.Add(logger.Warning, &tracker, record.Range, - fmt.Sprintf("%q should be marked as external for use with \"require.resolve\"", record.Path.Text)) - } - continue - } - - if resolveResult == nil { - // Failed imports inside a try/catch are silently turned into - // external imports instead of causing errors. This matches a common - // code pattern for conditionally importing a module with a graceful - // fallback. - if !didLogError && !record.HandlesImportErrors { - hint := "" - if resolver.IsPackagePath(record.Path.Text) { - hint = fmt.Sprintf("You can mark the path %q as external to exclude it from the bundle, which will remove this error.", record.Path.Text) - if record.Kind == ast.ImportRequire { - hint += " You can also surround this \"require\" call with a try/catch block to handle this failure at run-time instead of bundle-time." - } else if record.Kind == ast.ImportDynamic { - hint += " You can also add \".catch()\" here to handle this failure at run-time instead of bundle-time." - } - if pluginName == "" && !args.fs.IsAbs(record.Path.Text) { - if query := args.res.ProbeResolvePackageAsRelative(absResolveDir, record.Path.Text, record.Kind); query != nil { - hint = fmt.Sprintf("Use the relative path %q to reference the file %q. "+ - "Without the leading \"./\", the path %q is being interpreted as a package path instead.", - "./"+record.Path.Text, args.res.PrettyPath(query.PathPair.Primary), record.Path.Text) - } - } - } - if args.options.Platform != config.PlatformNode { - if _, ok := resolver.BuiltInNodeModules[record.Path.Text]; ok { - var how string - switch logger.API { - case logger.CLIAPI: - how = "--platform=node" - case logger.JSAPI: - how = "platform: 'node'" - case logger.GoAPI: - how = "Platform: api.PlatformNode" - } - hint = fmt.Sprintf("The package %q wasn't found on the file system but is built into node. "+ - "Are you trying to bundle for node? You can use %q to do that, which will remove this error.", record.Path.Text, how) - } - } - if absResolveDir == "" && pluginName != "" { - hint = fmt.Sprintf("The plugin %q didn't set a resolve directory for the file %q, "+ - "so esbuild did not search for %q on the file system.", pluginName, source.PrettyPath, record.Path.Text) - } - var notes []logger.MsgData - if hint != "" { - notes = append(notes, logger.MsgData{Text: hint}) - } - debug.LogErrorMsg(args.log, &source, record.Range, fmt.Sprintf("Could not resolve %q", record.Path.Text), notes) - } else if args.log.Level <= logger.LevelDebug && !didLogError && record.HandlesImportErrors { - args.log.Add(logger.Debug, &tracker, record.Range, - fmt.Sprintf("Importing %q was allowed even though it could not be resolved because dynamic import failures appear to be handled here:", - record.Path.Text)) - } - continue - } - - result.resolveResults[importRecordIndex] = resolveResult - } - } - } - - // Attempt to parse the source map if present - if loader.CanHaveSourceMap() && args.options.SourceMap != config.SourceMapNone { - var sourceMapComment logger.Span - switch repr := result.file.inputFile.Repr.(type) { - case *graph.JSRepr: - sourceMapComment = repr.AST.SourceMapComment - case *graph.CSSRepr: - sourceMapComment = repr.AST.SourceMapComment - } - if sourceMapComment.Text != "" { - if path, contents := extractSourceMapFromComment(args.log, args.fs, &args.caches.FSCache, - args.res, &source, sourceMapComment, absResolveDir); contents != nil { - result.file.inputFile.InputSourceMap = js_parser.ParseSourceMap(args.log, logger.Source{ - KeyPath: path, - PrettyPath: args.res.PrettyPath(path), - Contents: *contents, - }) - } - } - } - - args.results <- result -} - -func joinWithPublicPath(publicPath string, relPath string) string { - if strings.HasPrefix(relPath, "./") { - relPath = relPath[2:] - - // Strip any amount of further no-op slashes (i.e. ".///././/x/y" => "x/y") - for { - if strings.HasPrefix(relPath, "/") { - relPath = relPath[1:] - } else if strings.HasPrefix(relPath, "./") { - relPath = relPath[2:] - } else { - break - } - } - } - - // Use a relative path if there is no public path - if publicPath == "" { - publicPath = "." - } - - // Join with a slash - slash := "/" - if strings.HasSuffix(publicPath, "/") { - slash = "" - } - return fmt.Sprintf("%s%s%s", publicPath, slash, relPath) -} - -func isASCIIOnly(text string) bool { - for _, c := range text { - if c < 0x20 || c > 0x7E { - return false - } - } - return true -} - -func guessMimeType(extension string, contents string) string { - mimeType := helpers.MimeTypeByExtension(extension) - if mimeType == "" { - mimeType = http.DetectContentType([]byte(contents)) - } - - // Turn "text/plain; charset=utf-8" into "text/plain;charset=utf-8" - return strings.ReplaceAll(mimeType, "; ", ";") -} - -func extractSourceMapFromComment( - log logger.Log, - fs fs.FS, - fsCache *cache.FSCache, - res resolver.Resolver, - source *logger.Source, - comment logger.Span, - absResolveDir string, -) (logger.Path, *string) { - tracker := logger.MakeLineColumnTracker(source) - - // Support data URLs - if parsed, ok := resolver.ParseDataURL(comment.Text); ok { - if contents, err := parsed.DecodeData(); err == nil { - return logger.Path{Text: source.PrettyPath, IgnoredSuffix: "#sourceMappingURL"}, &contents - } else { - log.Add(logger.Warning, &tracker, comment.Range, fmt.Sprintf("Unsupported source map comment: %s", err.Error())) - return logger.Path{}, nil - } - } - - // Relative path in a file with an absolute path - if absResolveDir != "" { - absPath := fs.Join(absResolveDir, comment.Text) - path := logger.Path{Text: absPath, Namespace: "file"} - contents, err, originalError := fsCache.ReadFile(fs, absPath) - if log.Level <= logger.LevelDebug && originalError != nil { - log.Add(logger.Debug, &tracker, comment.Range, fmt.Sprintf("Failed to read file %q: %s", res.PrettyPath(path), originalError.Error())) - } - if err != nil { - if err == syscall.ENOENT { - // Don't report a warning because this is likely unactionable - return logger.Path{}, nil - } - log.Add(logger.Warning, &tracker, comment.Range, fmt.Sprintf("Cannot read file %q: %s", res.PrettyPath(path), err.Error())) - return logger.Path{}, nil - } - return path, &contents - } - - // Anything else is unsupported - return logger.Path{}, nil -} - -func sanitizeLocation(res resolver.Resolver, loc *logger.MsgLocation) { - if loc != nil { - if loc.Namespace == "" { - loc.Namespace = "file" - } - if loc.File != "" { - loc.File = res.PrettyPath(logger.Path{Text: loc.File, Namespace: loc.Namespace}) - } - } -} - -func logPluginMessages( - res resolver.Resolver, - log logger.Log, - name string, - msgs []logger.Msg, - thrown error, - importSource *logger.Source, - importPathRange logger.Range, -) bool { - didLogError := false - tracker := logger.MakeLineColumnTracker(importSource) - - // Report errors and warnings generated by the plugin - for _, msg := range msgs { - if msg.PluginName == "" { - msg.PluginName = name - } - if msg.Kind == logger.Error { - didLogError = true - } - - // Sanitize the locations - for _, note := range msg.Notes { - sanitizeLocation(res, note.Location) - } - if msg.Data.Location == nil { - msg.Data.Location = tracker.MsgLocationOrNil(importPathRange) - } else { - sanitizeLocation(res, msg.Data.Location) - if msg.Data.Location.File == "" && importSource != nil { - msg.Data.Location.File = importSource.PrettyPath - } - if importSource != nil { - msg.Notes = append(msg.Notes, tracker.MsgData(importPathRange, - fmt.Sprintf("The plugin %q was triggered by this import", name))) - } - } - - log.AddMsg(msg) - } - - // Report errors thrown by the plugin itself - if thrown != nil { - didLogError = true - text := thrown.Error() - log.AddMsg(logger.Msg{ - PluginName: name, - Kind: logger.Error, - Data: logger.MsgData{ - Text: text, - Location: tracker.MsgLocationOrNil(importPathRange), - UserDetail: thrown, - }, - }) - } - - return didLogError -} - -func runOnResolvePlugins( - plugins []config.Plugin, - res resolver.Resolver, - log logger.Log, - fs fs.FS, - fsCache *cache.FSCache, - importSource *logger.Source, - importPathRange logger.Range, - importNamespace string, - path string, - kind ast.ImportKind, - absResolveDir string, - pluginData interface{}, -) (*resolver.ResolveResult, bool, resolver.DebugMeta) { - resolverArgs := config.OnResolveArgs{ - Path: path, - ResolveDir: absResolveDir, - Kind: kind, - PluginData: pluginData, - } - applyPath := logger.Path{ - Text: path, - Namespace: importNamespace, - } - if importSource != nil { - resolverArgs.Importer = importSource.KeyPath - } else { - resolverArgs.Importer.Namespace = importNamespace - } - tracker := logger.MakeLineColumnTracker(importSource) - - // Apply resolver plugins in order until one succeeds - for _, plugin := range plugins { - for _, onResolve := range plugin.OnResolve { - if !config.PluginAppliesToPath(applyPath, onResolve.Filter, onResolve.Namespace) { - continue - } - - result := onResolve.Callback(resolverArgs) - pluginName := result.PluginName - if pluginName == "" { - pluginName = plugin.Name - } - didLogError := logPluginMessages(res, log, pluginName, result.Msgs, result.ThrownError, importSource, importPathRange) - - // Plugins can also provide additional file system paths to watch - for _, file := range result.AbsWatchFiles { - fsCache.ReadFile(fs, file) - } - for _, dir := range result.AbsWatchDirs { - if entries, err, _ := fs.ReadDirectory(dir); err == nil { - entries.SortedKeys() - } - } - - // Stop now if there was an error - if didLogError { - return nil, true, resolver.DebugMeta{} - } - - // The "file" namespace is the default for non-external paths, but not - // for external paths. External paths must explicitly specify the "file" - // namespace. - nsFromPlugin := result.Path.Namespace - if result.Path.Namespace == "" && !result.External { - result.Path.Namespace = "file" - } - - // Otherwise, continue on to the next resolver if this loader didn't succeed - if result.Path.Text == "" { - if result.External { - result.Path = logger.Path{Text: path} - } else { - continue - } - } - - // Paths in the file namespace must be absolute paths - if result.Path.Namespace == "file" && !fs.IsAbs(result.Path.Text) { - if nsFromPlugin == "file" { - log.Add(logger.Error, &tracker, importPathRange, - fmt.Sprintf("Plugin %q returned a path in the \"file\" namespace that is not an absolute path: %s", pluginName, result.Path.Text)) - } else { - log.Add(logger.Error, &tracker, importPathRange, - fmt.Sprintf("Plugin %q returned a non-absolute path: %s (set a namespace if this is not a file path)", pluginName, result.Path.Text)) - } - return nil, true, resolver.DebugMeta{} - } - - var sideEffectsData *resolver.SideEffectsData - if result.IsSideEffectFree { - sideEffectsData = &resolver.SideEffectsData{ - PluginName: pluginName, - } - } - - return &resolver.ResolveResult{ - PathPair: resolver.PathPair{Primary: result.Path}, - IsExternal: result.External, - PluginData: result.PluginData, - PrimarySideEffectsData: sideEffectsData, - }, false, resolver.DebugMeta{} - } - } - - // Resolve relative to the resolve directory by default. All paths in the - // "file" namespace automatically have a resolve directory. Loader plugins - // can also configure a custom resolve directory for files in other namespaces. - result, debug := res.Resolve(absResolveDir, path, kind) - - // Warn when the case used for importing differs from the actual file name - if result != nil && result.DifferentCase != nil && !helpers.IsInsideNodeModules(absResolveDir) { - diffCase := *result.DifferentCase - log.Add(logger.Warning, &tracker, importPathRange, fmt.Sprintf( - "Use %q instead of %q to avoid issues with case-sensitive file systems", - res.PrettyPath(logger.Path{Text: fs.Join(diffCase.Dir, diffCase.Actual), Namespace: "file"}), - res.PrettyPath(logger.Path{Text: fs.Join(diffCase.Dir, diffCase.Query), Namespace: "file"}), - )) - } - - return result, false, debug -} - -type loaderPluginResult struct { - loader config.Loader - absResolveDir string - pluginName string - pluginData interface{} -} - -func runOnLoadPlugins( - plugins []config.Plugin, - res resolver.Resolver, - fs fs.FS, - fsCache *cache.FSCache, - log logger.Log, - source *logger.Source, - importSource *logger.Source, - importPathRange logger.Range, - pluginData interface{}, - isWatchMode bool, -) (loaderPluginResult, bool) { - loaderArgs := config.OnLoadArgs{ - Path: source.KeyPath, - PluginData: pluginData, - } - tracker := logger.MakeLineColumnTracker(importSource) - - // Apply loader plugins in order until one succeeds - for _, plugin := range plugins { - for _, onLoad := range plugin.OnLoad { - if !config.PluginAppliesToPath(source.KeyPath, onLoad.Filter, onLoad.Namespace) { - continue - } - - result := onLoad.Callback(loaderArgs) - pluginName := result.PluginName - if pluginName == "" { - pluginName = plugin.Name - } - didLogError := logPluginMessages(res, log, pluginName, result.Msgs, result.ThrownError, importSource, importPathRange) - - // Plugins can also provide additional file system paths to watch - for _, file := range result.AbsWatchFiles { - fsCache.ReadFile(fs, file) - } - for _, dir := range result.AbsWatchDirs { - if entries, err, _ := fs.ReadDirectory(dir); err == nil { - entries.SortedKeys() - } - } - - // Stop now if there was an error - if didLogError { - if isWatchMode && source.KeyPath.Namespace == "file" { - fsCache.ReadFile(fs, source.KeyPath.Text) // Read the file for watch mode tracking - } - return loaderPluginResult{}, false - } - - // Otherwise, continue on to the next loader if this loader didn't succeed - if result.Contents == nil { - continue - } - - source.Contents = *result.Contents - loader := result.Loader - if loader == config.LoaderNone { - loader = config.LoaderJS - } - if result.AbsResolveDir == "" && source.KeyPath.Namespace == "file" { - result.AbsResolveDir = fs.Dir(source.KeyPath.Text) - } - if isWatchMode && source.KeyPath.Namespace == "file" { - fsCache.ReadFile(fs, source.KeyPath.Text) // Read the file for watch mode tracking - } - return loaderPluginResult{ - loader: loader, - absResolveDir: result.AbsResolveDir, - pluginName: pluginName, - pluginData: result.PluginData, - }, true - } - } - - // Force disabled modules to be empty - if source.KeyPath.IsDisabled() { - return loaderPluginResult{loader: config.LoaderJS}, true - } - - // Read normal modules from disk - if source.KeyPath.Namespace == "file" { - if contents, err, originalError := fsCache.ReadFile(fs, source.KeyPath.Text); err == nil { - source.Contents = contents - return loaderPluginResult{ - loader: config.LoaderDefault, - absResolveDir: fs.Dir(source.KeyPath.Text), - }, true - } else { - if log.Level <= logger.LevelDebug && originalError != nil { - log.Add(logger.Debug, nil, logger.Range{}, fmt.Sprintf("Failed to read file %q: %s", source.KeyPath.Text, originalError.Error())) - } - if err == syscall.ENOENT { - log.Add(logger.Error, &tracker, importPathRange, - fmt.Sprintf("Could not read from file: %s", source.KeyPath.Text)) - return loaderPluginResult{}, false - } else { - log.Add(logger.Error, &tracker, importPathRange, - fmt.Sprintf("Cannot read file %q: %s", res.PrettyPath(source.KeyPath), err.Error())) - return loaderPluginResult{}, false - } - } - } - - // Native support for data URLs. This is supported natively by node: - // https://nodejs.org/docs/latest/api/esm.html#esm_data_imports - if source.KeyPath.Namespace == "dataurl" { - if parsed, ok := resolver.ParseDataURL(source.KeyPath.Text); ok { - if mimeType := parsed.DecodeMIMEType(); mimeType != resolver.MIMETypeUnsupported { - if contents, err := parsed.DecodeData(); err != nil { - log.Add(logger.Error, &tracker, importPathRange, - fmt.Sprintf("Could not load data URL: %s", err.Error())) - return loaderPluginResult{loader: config.LoaderNone}, true - } else { - source.Contents = contents - switch mimeType { - case resolver.MIMETypeTextCSS: - return loaderPluginResult{loader: config.LoaderCSS}, true - case resolver.MIMETypeTextJavaScript: - return loaderPluginResult{loader: config.LoaderJS}, true - case resolver.MIMETypeApplicationJSON: - return loaderPluginResult{loader: config.LoaderJSON}, true - } - } - } - } - } - - // Otherwise, fail to load the path - return loaderPluginResult{loader: config.LoaderNone}, true -} - -func loaderFromFileExtension(extensionToLoader map[string]config.Loader, base string) config.Loader { - // Pick the loader with the longest matching extension. So if there's an - // extension for ".css" and for ".module.css", we want to match the one for - // ".module.css" before the one for ".css". - for { - i := strings.IndexByte(base, '.') - if i == -1 { - break - } - if loader, ok := extensionToLoader[base[i:]]; ok { - return loader - } - base = base[i+1:] - } - return config.LoaderNone -} - -// Identify the path by its lowercase absolute path name with Windows-specific -// slashes substituted for standard slashes. This should hopefully avoid path -// issues on Windows where multiple different paths can refer to the same -// underlying file. -func canonicalFileSystemPathForWindows(absPath string) string { - return strings.ReplaceAll(strings.ToLower(absPath), "\\", "/") -} - -func hashForFileName(hashBytes []byte) string { - return base32.StdEncoding.EncodeToString(hashBytes)[:8] -} - -type scanner struct { - log logger.Log - fs fs.FS - res resolver.Resolver - caches *cache.CacheSet - options config.Options - timer *helpers.Timer - uniqueKeyPrefix string - - // This is not guarded by a mutex because it's only ever modified by a single - // thread. Note that not all results in the "results" array are necessarily - // valid. Make sure to check the "ok" flag before using them. - results []parseResult - visited map[logger.Path]uint32 - resultChannel chan parseResult - remaining int -} - -type EntryPoint struct { - InputPath string - OutputPath string - IsFile bool -} - -func generateUniqueKeyPrefix() (string, error) { - var data [12]byte - rand.Seed(time.Now().UnixNano()) - if _, err := rand.Read(data[:]); err != nil { - return "", err - } - - // This is 16 bytes and shouldn't generate escape characters when put into strings - return base64.URLEncoding.EncodeToString(data[:]), nil -} - -func ScanBundle( - log logger.Log, - fs fs.FS, - res resolver.Resolver, - caches *cache.CacheSet, - entryPoints []EntryPoint, - options config.Options, - timer *helpers.Timer, -) Bundle { - timer.Begin("Scan phase") - defer timer.End("Scan phase") - - applyOptionDefaults(&options) - - // Run "onStart" plugins in parallel - onStartWaitGroup := sync.WaitGroup{} - for _, plugin := range options.Plugins { - for _, onStart := range plugin.OnStart { - onStartWaitGroup.Add(1) - go func(plugin config.Plugin, onStart config.OnStart) { - result := onStart.Callback() - logPluginMessages(res, log, plugin.Name, result.Msgs, result.ThrownError, nil, logger.Range{}) - onStartWaitGroup.Done() - }(plugin, onStart) - } - } - - // Each bundling operation gets a separate unique key - uniqueKeyPrefix, err := generateUniqueKeyPrefix() - if err != nil { - log.Add(logger.Error, nil, logger.Range{}, fmt.Sprintf("Failed to read from randomness source: %s", err.Error())) - } - - s := scanner{ - log: log, - fs: fs, - res: res, - caches: caches, - options: options, - timer: timer, - results: make([]parseResult, 0, caches.SourceIndexCache.LenHint()), - visited: make(map[logger.Path]uint32), - resultChannel: make(chan parseResult), - uniqueKeyPrefix: uniqueKeyPrefix, - } - - // Always start by parsing the runtime file - s.results = append(s.results, parseResult{}) - s.remaining++ - go func() { - source, ast, ok := globalRuntimeCache.parseRuntime(&options) - s.resultChannel <- parseResult{ - file: scannerFile{ - inputFile: graph.InputFile{ - Source: source, - Repr: &graph.JSRepr{AST: ast}, - }, - }, - ok: ok, - } - }() - - s.preprocessInjectedFiles() - entryPointMeta := s.addEntryPoints(entryPoints) - s.scanAllDependencies() - files := s.processScannedFiles() - - onStartWaitGroup.Wait() - return Bundle{ - fs: fs, - res: res, - files: files, - entryPoints: entryPointMeta, - uniqueKeyPrefix: uniqueKeyPrefix, - } -} - -type inputKind uint8 - -const ( - inputKindNormal inputKind = iota - inputKindEntryPoint - inputKindStdin -) - -// This returns the source index of the resulting file -func (s *scanner) maybeParseFile( - resolveResult resolver.ResolveResult, - prettyPath string, - importSource *logger.Source, - importPathRange logger.Range, - pluginData interface{}, - kind inputKind, - inject chan config.InjectedFile, -) uint32 { - path := resolveResult.PathPair.Primary - visitedKey := path - if visitedKey.Namespace == "file" { - visitedKey.Text = canonicalFileSystemPathForWindows(visitedKey.Text) - } - - // Only parse a given file path once - sourceIndex, ok := s.visited[visitedKey] - if ok { - return sourceIndex - } - - sourceIndex = s.allocateSourceIndex(visitedKey, cache.SourceIndexNormal) - s.visited[visitedKey] = sourceIndex - s.remaining++ - optionsClone := s.options - if kind != inputKindStdin { - optionsClone.Stdin = nil - } - - // Allow certain properties to be overridden - if len(resolveResult.JSXFactory) > 0 { - optionsClone.JSX.Factory = config.JSXExpr{Parts: resolveResult.JSXFactory} - } - if len(resolveResult.JSXFragment) > 0 { - optionsClone.JSX.Fragment = config.JSXExpr{Parts: resolveResult.JSXFragment} - } - if resolveResult.UseDefineForClassFieldsTS != config.Unspecified { - optionsClone.UseDefineForClassFields = resolveResult.UseDefineForClassFieldsTS - } - if resolveResult.UnusedImportsTS != config.UnusedImportsRemoveStmt { - optionsClone.UnusedImportsTS = resolveResult.UnusedImportsTS - } - optionsClone.TSTarget = resolveResult.TSTarget - - // Set the module type preference using node's module type rules - if strings.HasSuffix(path.Text, ".mjs") || strings.HasSuffix(path.Text, ".mts") { - optionsClone.ModuleType = js_ast.ModuleESM - } else if strings.HasSuffix(path.Text, ".cjs") || strings.HasSuffix(path.Text, ".cts") { - optionsClone.ModuleType = js_ast.ModuleCommonJS - } else { - optionsClone.ModuleType = resolveResult.ModuleType - } - - // Enable bundling for injected files so we always do tree shaking. We - // never want to include unnecessary code from injected files since they - // are essentially bundled. However, if we do this we should skip the - // resolving step when we're not bundling. It'd be strange to get - // resolution errors when the top-level bundling controls are disabled. - skipResolve := false - if inject != nil && optionsClone.Mode != config.ModeBundle { - optionsClone.Mode = config.ModeBundle - skipResolve = true - } - - // Special-case pretty-printed paths for data URLs - if path.Namespace == "dataurl" { - if _, ok := resolver.ParseDataURL(path.Text); ok { - prettyPath = path.Text - if len(prettyPath) > 64 { - prettyPath = prettyPath[:64] + "..." - } - prettyPath = fmt.Sprintf("<%s>", prettyPath) - } - } - - var sideEffects graph.SideEffects - if resolveResult.PrimarySideEffectsData != nil { - sideEffects.Kind = graph.NoSideEffects_PackageJSON - sideEffects.Data = resolveResult.PrimarySideEffectsData - } - - go parseFile(parseArgs{ - fs: s.fs, - log: s.log, - res: s.res, - caches: s.caches, - keyPath: path, - prettyPath: prettyPath, - sourceIndex: sourceIndex, - importSource: importSource, - sideEffects: sideEffects, - importPathRange: importPathRange, - pluginData: pluginData, - options: optionsClone, - results: s.resultChannel, - inject: inject, - skipResolve: skipResolve, - uniqueKeyPrefix: s.uniqueKeyPrefix, - }) - - return sourceIndex -} - -func (s *scanner) allocateSourceIndex(path logger.Path, kind cache.SourceIndexKind) uint32 { - // Allocate a source index using the shared source index cache so that - // subsequent builds reuse the same source index and therefore use the - // cached parse results for increased speed. - sourceIndex := s.caches.SourceIndexCache.Get(path, kind) - - // Grow the results array to fit this source index - if newLen := int(sourceIndex) + 1; len(s.results) < newLen { - // Reallocate to a bigger array - if cap(s.results) < newLen { - s.results = append(make([]parseResult, 0, 2*newLen), s.results...) - } - - // Grow in place - s.results = s.results[:newLen] - } - - return sourceIndex -} - -func (s *scanner) preprocessInjectedFiles() { - s.timer.Begin("Preprocess injected files") - defer s.timer.End("Preprocess injected files") - - injectedFiles := make([]config.InjectedFile, 0, len(s.options.InjectedDefines)+len(s.options.InjectAbsPaths)) - duplicateInjectedFiles := make(map[string]bool) - injectWaitGroup := sync.WaitGroup{} - - // These are virtual paths that are generated for compound "--define" values. - // They are special-cased and are not available for plugins to intercept. - for _, define := range s.options.InjectedDefines { - // These should be unique by construction so no need to check for collisions - visitedKey := logger.Path{Text: fmt.Sprintf("", define.Name)} - sourceIndex := s.allocateSourceIndex(visitedKey, cache.SourceIndexNormal) - s.visited[visitedKey] = sourceIndex - source := logger.Source{ - Index: sourceIndex, - KeyPath: visitedKey, - PrettyPath: s.res.PrettyPath(visitedKey), - IdentifierName: js_ast.EnsureValidIdentifier(visitedKey.Text), - } - - // The first "len(InjectedDefine)" injected files intentionally line up - // with the injected defines by index. The index will be used to import - // references to them in the parser. - injectedFiles = append(injectedFiles, config.InjectedFile{ - Source: source, - DefineName: define.Name, - }) - - // Generate the file inline here since it has already been parsed - expr := js_ast.Expr{Data: define.Data} - ast := js_parser.LazyExportAST(s.log, source, js_parser.OptionsFromConfig(&s.options), expr, "") - result := parseResult{ - ok: true, - file: scannerFile{ - inputFile: graph.InputFile{ - Source: source, - Repr: &graph.JSRepr{AST: ast}, - Loader: config.LoaderJSON, - SideEffects: graph.SideEffects{ - Kind: graph.NoSideEffects_PureData, - }, - }, - }, - } - - // Append to the channel on a goroutine in case it blocks due to capacity - s.remaining++ - go func() { s.resultChannel <- result }() - } - - results := make([]config.InjectedFile, len(s.options.InjectAbsPaths)) - j := 0 - for _, absPath := range s.options.InjectAbsPaths { - prettyPath := s.res.PrettyPath(logger.Path{Text: absPath, Namespace: "file"}) - absPathKey := canonicalFileSystemPathForWindows(absPath) - - if duplicateInjectedFiles[absPathKey] { - s.log.Add(logger.Error, nil, logger.Range{}, fmt.Sprintf("Duplicate injected file %q", prettyPath)) - continue - } - - duplicateInjectedFiles[absPathKey] = true - resolveResult := s.res.ResolveAbs(absPath) - - if resolveResult == nil { - s.log.Add(logger.Error, nil, logger.Range{}, fmt.Sprintf("Could not resolve %q", prettyPath)) - continue - } - - channel := make(chan config.InjectedFile) - s.maybeParseFile(*resolveResult, prettyPath, nil, logger.Range{}, nil, inputKindNormal, channel) - - // Wait for the results in parallel. The results slice is large enough so - // it is not reallocated during the computations. - injectWaitGroup.Add(1) - go func(i int) { - results[i] = <-channel - injectWaitGroup.Done() - }(j) - j++ - } - - injectWaitGroup.Wait() - injectedFiles = append(injectedFiles, results[:j]...) - - s.options.InjectedFiles = injectedFiles -} - -func (s *scanner) addEntryPoints(entryPoints []EntryPoint) []graph.EntryPoint { - s.timer.Begin("Add entry points") - defer s.timer.End("Add entry points") - - // Reserve a slot for each entry point - entryMetas := make([]graph.EntryPoint, 0, len(entryPoints)+1) - - // Treat stdin as an extra entry point - if stdin := s.options.Stdin; stdin != nil { - stdinPath := logger.Path{Text: ""} - if stdin.SourceFile != "" { - if stdin.AbsResolveDir == "" { - stdinPath = logger.Path{Text: stdin.SourceFile} - } else if s.fs.IsAbs(stdin.SourceFile) { - stdinPath = logger.Path{Text: stdin.SourceFile, Namespace: "file"} - } else { - stdinPath = logger.Path{Text: s.fs.Join(stdin.AbsResolveDir, stdin.SourceFile), Namespace: "file"} - } - } - resolveResult := resolver.ResolveResult{PathPair: resolver.PathPair{Primary: stdinPath}} - sourceIndex := s.maybeParseFile(resolveResult, s.res.PrettyPath(stdinPath), nil, logger.Range{}, nil, inputKindStdin, nil) - entryMetas = append(entryMetas, graph.EntryPoint{ - OutputPath: "stdin", - SourceIndex: sourceIndex, - }) - } - - // Check each entry point ahead of time to see if it's a real file - entryPointAbsResolveDir := s.fs.Cwd() - for i := range entryPoints { - entryPoint := &entryPoints[i] - absPath := entryPoint.InputPath - if !s.fs.IsAbs(absPath) { - absPath = s.fs.Join(entryPointAbsResolveDir, absPath) - } - dir := s.fs.Dir(absPath) - base := s.fs.Base(absPath) - if entries, err, originalError := s.fs.ReadDirectory(dir); err == nil { - if entry, _ := entries.Get(base); entry != nil && entry.Kind(s.fs) == fs.FileEntry { - entryPoint.IsFile = true - - // Entry point paths without a leading "./" are interpreted as package - // paths. This happens because they go through general path resolution - // like all other import paths so that plugins can run on them. Requiring - // a leading "./" for a relative path simplifies writing plugins because - // entry points aren't a special case. - // - // However, requiring a leading "./" also breaks backward compatibility - // and makes working with the CLI more difficult. So attempt to insert - // "./" automatically when needed. We don't want to unconditionally insert - // a leading "./" because the path may not be a file system path. For - // example, it may be a URL. So only insert a leading "./" when the path - // is an exact match for an existing file. - if !s.fs.IsAbs(entryPoint.InputPath) && resolver.IsPackagePath(entryPoint.InputPath) { - entryPoint.InputPath = "./" + entryPoint.InputPath - } - } - } else if s.log.Level <= logger.LevelDebug && originalError != nil { - s.log.Add(logger.Debug, nil, logger.Range{}, fmt.Sprintf("Failed to read directory %q: %s", absPath, originalError.Error())) - } - } - - // Add any remaining entry points. Run resolver plugins on these entry points - // so plugins can alter where they resolve to. These are run in parallel in - // case any of these plugins block. - entryPointResolveResults := make([]*resolver.ResolveResult, len(entryPoints)) - entryPointWaitGroup := sync.WaitGroup{} - entryPointWaitGroup.Add(len(entryPoints)) - for i, entryPoint := range entryPoints { - go func(i int, entryPoint EntryPoint) { - namespace := "" - if entryPoint.IsFile { - namespace = "file" - } - - // Run the resolver and log an error if the path couldn't be resolved - resolveResult, didLogError, debug := runOnResolvePlugins( - s.options.Plugins, - s.res, - s.log, - s.fs, - &s.caches.FSCache, - nil, - logger.Range{}, - namespace, - entryPoint.InputPath, - ast.ImportEntryPoint, - entryPointAbsResolveDir, - nil, - ) - if resolveResult != nil { - if resolveResult.IsExternal { - s.log.Add(logger.Error, nil, logger.Range{}, fmt.Sprintf("The entry point %q cannot be marked as external", entryPoint.InputPath)) - } else { - entryPointResolveResults[i] = resolveResult - } - } else if !didLogError { - var notes []logger.MsgData - if !s.fs.IsAbs(entryPoint.InputPath) { - if strings.ContainsRune(entryPoint.InputPath, '*') { - notes = append(notes, logger.MsgData{ - Text: "It looks like you are trying to use glob syntax (i.e. \"*\") with esbuild. " + - "This syntax is typically handled by your shell, and isn't handled by esbuild itself. " + - "You must expand glob syntax first before passing your paths to esbuild.", - }) - } else if query := s.res.ProbeResolvePackageAsRelative(entryPointAbsResolveDir, entryPoint.InputPath, ast.ImportEntryPoint); query != nil { - notes = append(notes, logger.MsgData{ - Text: fmt.Sprintf("Use the relative path %q to reference the file %q. "+ - "Without the leading \"./\", the path %q is being interpreted as a package path instead.", - "./"+entryPoint.InputPath, s.res.PrettyPath(query.PathPair.Primary), entryPoint.InputPath), - }) - } - } - debug.LogErrorMsg(s.log, nil, logger.Range{}, fmt.Sprintf("Could not resolve %q", entryPoint.InputPath), notes) - } - entryPointWaitGroup.Done() - }(i, entryPoint) - } - entryPointWaitGroup.Wait() - - // Parse all entry points that were resolved successfully - for i, resolveResult := range entryPointResolveResults { - if resolveResult != nil { - prettyPath := s.res.PrettyPath(resolveResult.PathPair.Primary) - sourceIndex := s.maybeParseFile(*resolveResult, prettyPath, nil, logger.Range{}, resolveResult.PluginData, inputKindEntryPoint, nil) - outputPath := entryPoints[i].OutputPath - outputPathWasAutoGenerated := false - - // If the output path is missing, automatically generate one from the input path - if outputPath == "" { - outputPath = entryPoints[i].InputPath - windowsVolumeLabel := "" - - // The ":" character is invalid in file paths on Windows except when - // it's used as a volume separator. Special-case that here so volume - // labels don't break on Windows. - if s.fs.IsAbs(outputPath) && len(outputPath) >= 3 && outputPath[1] == ':' { - if c := outputPath[0]; (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') { - if c := outputPath[2]; c == '/' || c == '\\' { - windowsVolumeLabel = outputPath[:3] - outputPath = outputPath[3:] - } - } - } - - // For cross-platform robustness, do not allow characters in the output - // path that are invalid on Windows. This is especially relevant when - // the input path is something other than a file path, such as a URL. - outputPath = sanitizeFilePathForVirtualModulePath(outputPath) - if windowsVolumeLabel != "" { - outputPath = windowsVolumeLabel + outputPath - } - outputPathWasAutoGenerated = true - - // Strip the file extension from the output path if there is one so the - // "out extension" setting is used instead - if last := strings.LastIndexAny(outputPath, "/.\\"); last != -1 && outputPath[last] == '.' { - outputPath = outputPath[:last] - } - } - - entryMetas = append(entryMetas, graph.EntryPoint{ - OutputPath: outputPath, - SourceIndex: sourceIndex, - OutputPathWasAutoGenerated: outputPathWasAutoGenerated, - }) - } - } - - // Turn all automatically-generated output paths into absolute paths - for i := range entryMetas { - entryPoint := &entryMetas[i] - if entryPoint.OutputPathWasAutoGenerated && !s.fs.IsAbs(entryPoint.OutputPath) { - entryPoint.OutputPath = s.fs.Join(entryPointAbsResolveDir, entryPoint.OutputPath) - } - } - - // Automatically compute "outbase" if it wasn't provided - if s.options.AbsOutputBase == "" { - s.options.AbsOutputBase = lowestCommonAncestorDirectory(s.fs, entryMetas) - if s.options.AbsOutputBase == "" { - s.options.AbsOutputBase = entryPointAbsResolveDir - } - } - - // Turn all output paths back into relative paths, but this time relative to - // the "outbase" value we computed above - for i := range entryMetas { - entryPoint := &entryMetas[i] - if s.fs.IsAbs(entryPoint.OutputPath) { - if !entryPoint.OutputPathWasAutoGenerated { - // If an explicit absolute output path was specified, use the path - // relative to the "outdir" directory - if relPath, ok := s.fs.Rel(s.options.AbsOutputDir, entryPoint.OutputPath); ok { - entryPoint.OutputPath = relPath - } - } else { - // Otherwise if the absolute output path was derived from the input - // path, use the path relative to the "outbase" directory - if relPath, ok := s.fs.Rel(s.options.AbsOutputBase, entryPoint.OutputPath); ok { - entryPoint.OutputPath = relPath - } - } - } - } - - return entryMetas -} - -func lowestCommonAncestorDirectory(fs fs.FS, entryPoints []graph.EntryPoint) string { - // Ignore any explicitly-specified output paths - absPaths := make([]string, 0, len(entryPoints)) - for _, entryPoint := range entryPoints { - if entryPoint.OutputPathWasAutoGenerated { - absPaths = append(absPaths, entryPoint.OutputPath) - } - } - - if len(absPaths) == 0 { - return "" - } - - lowestAbsDir := fs.Dir(absPaths[0]) - - for _, absPath := range absPaths[1:] { - absDir := fs.Dir(absPath) - lastSlash := 0 - a := 0 - b := 0 - - for { - runeA, widthA := utf8.DecodeRuneInString(absDir[a:]) - runeB, widthB := utf8.DecodeRuneInString(lowestAbsDir[b:]) - boundaryA := widthA == 0 || runeA == '/' || runeA == '\\' - boundaryB := widthB == 0 || runeB == '/' || runeB == '\\' - - if boundaryA && boundaryB { - if widthA == 0 || widthB == 0 { - // Truncate to the smaller path if one path is a prefix of the other - lowestAbsDir = absDir[:a] - break - } else { - // Track the longest common directory so far - lastSlash = a - } - } else if boundaryA != boundaryB || unicode.ToLower(runeA) != unicode.ToLower(runeB) { - // If both paths are different at this point, stop and set the lowest so - // far to the common parent directory. Compare using a case-insensitive - // comparison to handle paths on Windows. - lowestAbsDir = absDir[:lastSlash] - break - } - - a += widthA - b += widthB - } - } - - return lowestAbsDir -} - -func (s *scanner) scanAllDependencies() { - s.timer.Begin("Scan all dependencies") - defer s.timer.End("Scan all dependencies") - - // Continue scanning until all dependencies have been discovered - for s.remaining > 0 { - result := <-s.resultChannel - s.remaining-- - if !result.ok { - continue - } - - // Don't try to resolve paths if we're not bundling - if s.options.Mode == config.ModeBundle { - records := *result.file.inputFile.Repr.ImportRecords() - for importRecordIndex := range records { - record := &records[importRecordIndex] - - // Skip this import record if the previous resolver call failed - resolveResult := result.resolveResults[importRecordIndex] - if resolveResult == nil { - continue - } - - path := resolveResult.PathPair.Primary - if !resolveResult.IsExternal { - // Handle a path within the bundle - sourceIndex := s.maybeParseFile(*resolveResult, s.res.PrettyPath(path), - &result.file.inputFile.Source, record.Range, resolveResult.PluginData, inputKindNormal, nil) - record.SourceIndex = ast.MakeIndex32(sourceIndex) - } else { - // If the path to the external module is relative to the source - // file, rewrite the path to be relative to the working directory - if path.Namespace == "file" { - if relPath, ok := s.fs.Rel(s.options.AbsOutputDir, path.Text); ok { - // Prevent issues with path separators being different on Windows - relPath = strings.ReplaceAll(relPath, "\\", "/") - if resolver.IsPackagePath(relPath) { - relPath = "./" + relPath - } - record.Path.Text = relPath - } else { - record.Path = path - } - } else { - record.Path = path - } - } - } - } - - s.results[result.file.inputFile.Source.Index] = result - } -} - -func (s *scanner) processScannedFiles() []scannerFile { - s.timer.Begin("Process scanned files") - defer s.timer.End("Process scanned files") - - // Now that all files have been scanned, process the final file import records - for i, result := range s.results { - if !result.ok { - continue - } - - sb := strings.Builder{} - isFirstImport := true - - // Begin the metadata chunk - if s.options.NeedsMetafile { - sb.Write(js_printer.QuoteForJSON(result.file.inputFile.Source.PrettyPath, s.options.ASCIIOnly)) - sb.WriteString(fmt.Sprintf(": {\n \"bytes\": %d,\n \"imports\": [", len(result.file.inputFile.Source.Contents))) - } - - // Don't try to resolve paths if we're not bundling - if s.options.Mode == config.ModeBundle { - records := *result.file.inputFile.Repr.ImportRecords() - tracker := logger.MakeLineColumnTracker(&result.file.inputFile.Source) - - for importRecordIndex := range records { - record := &records[importRecordIndex] - - // Skip this import record if the previous resolver call failed - resolveResult := result.resolveResults[importRecordIndex] - if resolveResult == nil || !record.SourceIndex.IsValid() { - continue - } - - // Now that all files have been scanned, look for packages that are imported - // both with "import" and "require". Rewrite any imports that reference the - // "module" package.json field to the "main" package.json field instead. - // - // This attempts to automatically avoid the "dual package hazard" where a - // package has both a CommonJS module version and an ECMAScript module - // version and exports a non-object in CommonJS (often a function). If we - // pick the "module" field and the package is imported with "require" then - // code expecting a function will crash. - if resolveResult.PathPair.HasSecondary() { - secondaryKey := resolveResult.PathPair.Secondary - if secondaryKey.Namespace == "file" { - secondaryKey.Text = canonicalFileSystemPathForWindows(secondaryKey.Text) - } - if secondarySourceIndex, ok := s.visited[secondaryKey]; ok { - record.SourceIndex = ast.MakeIndex32(secondarySourceIndex) - } - } - - // Generate metadata about each import - if s.options.NeedsMetafile { - if isFirstImport { - isFirstImport = false - sb.WriteString("\n ") - } else { - sb.WriteString(",\n ") - } - sb.WriteString(fmt.Sprintf("{\n \"path\": %s,\n \"kind\": %s\n }", - js_printer.QuoteForJSON(s.results[record.SourceIndex.GetIndex()].file.inputFile.Source.PrettyPath, s.options.ASCIIOnly), - js_printer.QuoteForJSON(record.Kind.StringForMetafile(), s.options.ASCIIOnly))) - } - - switch record.Kind { - case ast.ImportAt, ast.ImportAtConditional: - // Using a JavaScript file with CSS "@import" is not allowed - otherFile := &s.results[record.SourceIndex.GetIndex()].file - if _, ok := otherFile.inputFile.Repr.(*graph.JSRepr); ok { - s.log.Add(logger.Error, &tracker, record.Range, - fmt.Sprintf("Cannot import %q into a CSS file", otherFile.inputFile.Source.PrettyPath)) - } else if record.Kind == ast.ImportAtConditional { - s.log.Add(logger.Error, &tracker, record.Range, - "Bundling with conditional \"@import\" rules is not currently supported") - } - - case ast.ImportURL: - // Using a JavaScript or CSS file with CSS "url()" is not allowed - otherFile := &s.results[record.SourceIndex.GetIndex()].file - switch otherRepr := otherFile.inputFile.Repr.(type) { - case *graph.CSSRepr: - s.log.Add(logger.Error, &tracker, record.Range, - fmt.Sprintf("Cannot use %q as a URL", otherFile.inputFile.Source.PrettyPath)) - - case *graph.JSRepr: - if otherRepr.AST.URLForCSS == "" { - s.log.Add(logger.Error, &tracker, record.Range, - fmt.Sprintf("Cannot use %q as a URL", otherFile.inputFile.Source.PrettyPath)) - } - } - } - - // If an import from a JavaScript file targets a CSS file, generate a - // JavaScript stub to ensure that JavaScript files only ever import - // other JavaScript files. - if _, ok := result.file.inputFile.Repr.(*graph.JSRepr); ok { - otherFile := &s.results[record.SourceIndex.GetIndex()].file - if css, ok := otherFile.inputFile.Repr.(*graph.CSSRepr); ok { - if s.options.WriteToStdout { - s.log.Add(logger.Error, &tracker, record.Range, - fmt.Sprintf("Cannot import %q into a JavaScript file without an output path configured", otherFile.inputFile.Source.PrettyPath)) - } else if !css.JSSourceIndex.IsValid() { - stubKey := otherFile.inputFile.Source.KeyPath - if stubKey.Namespace == "file" { - stubKey.Text = canonicalFileSystemPathForWindows(stubKey.Text) - } - sourceIndex := s.allocateSourceIndex(stubKey, cache.SourceIndexJSStubForCSS) - source := logger.Source{ - Index: sourceIndex, - PrettyPath: otherFile.inputFile.Source.PrettyPath, - } - s.results[sourceIndex] = parseResult{ - file: scannerFile{ - inputFile: graph.InputFile{ - Source: source, - Repr: &graph.JSRepr{ - AST: js_parser.LazyExportAST(s.log, source, - js_parser.OptionsFromConfig(&s.options), js_ast.Expr{Data: &js_ast.EObject{}}, ""), - CSSSourceIndex: ast.MakeIndex32(record.SourceIndex.GetIndex()), - }, - }, - }, - ok: true, - } - css.JSSourceIndex = ast.MakeIndex32(sourceIndex) - } - record.SourceIndex = css.JSSourceIndex - if !css.JSSourceIndex.IsValid() { - continue - } - } - } - - // Warn about this import if it's a bare import statement without any - // imported names (i.e. a side-effect-only import) and the module has - // been marked as having no side effects. - // - // Except don't do this if this file is inside "node_modules" since - // it's a bug in the package and the user won't be able to do anything - // about it. Note that this can result in esbuild silently generating - // broken code. If this actually happens for people, it's probably worth - // re-enabling the warning about code inside "node_modules". - if record.WasOriginallyBareImport && !s.options.IgnoreDCEAnnotations && - !helpers.IsInsideNodeModules(result.file.inputFile.Source.KeyPath.Text) { - if otherModule := &s.results[record.SourceIndex.GetIndex()].file.inputFile; otherModule.SideEffects.Kind != graph.HasSideEffects && - // Do not warn if this is from a plugin, since removing the import - // would cause the plugin to not run, and running a plugin is a side - // effect. - otherModule.SideEffects.Kind != graph.NoSideEffects_PureData_FromPlugin && - - // Do not warn if this has no side effects because the parsed AST - // is empty. This is the case for ".d.ts" files, for example. - otherModule.SideEffects.Kind != graph.NoSideEffects_EmptyAST { - - var notes []logger.MsgData - var by string - if data := otherModule.SideEffects.Data; data != nil { - if data.PluginName != "" { - by = fmt.Sprintf(" by plugin %q", data.PluginName) - } else { - var text string - if data.IsSideEffectsArrayInJSON { - text = "It was excluded from the \"sideEffects\" array in the enclosing \"package.json\" file" - } else { - text = "\"sideEffects\" is false in the enclosing \"package.json\" file" - } - tracker := logger.MakeLineColumnTracker(data.Source) - notes = append(notes, tracker.MsgData(data.Range, text)) - } - } - s.log.AddWithNotes(logger.Warning, &tracker, record.Range, - fmt.Sprintf("Ignoring this import because %q was marked as having no side effects%s", - otherModule.Source.PrettyPath, by), notes) - } - } - } - } - - // End the metadata chunk - if s.options.NeedsMetafile { - if !isFirstImport { - sb.WriteString("\n ") - } - sb.WriteString("]\n }") - } - - result.file.jsonMetadataChunk = sb.String() - - // If this file is from the "file" loader, generate an additional file - if result.file.inputFile.UniqueKeyForFileLoader != "" { - bytes := []byte(result.file.inputFile.Source.Contents) - - // Add a hash to the file name to prevent multiple files with the same name - // but different contents from colliding - var hash string - if config.HasPlaceholder(s.options.AssetPathTemplate, config.HashPlaceholder) { - h := xxhash.New() - h.Write(bytes) - hash = hashForFileName(h.Sum(nil)) - } - - // Generate the input for the template - _, _, originalExt := logger.PlatformIndependentPathDirBaseExt(result.file.inputFile.Source.KeyPath.Text) - dir, base := pathRelativeToOutbase( - &result.file.inputFile, - &s.options, - s.fs, - /* avoidIndex */ false, - /* customFilePath */ "", - ) - - // Apply the asset path template - templateExt := strings.TrimPrefix(originalExt, ".") - relPath := config.TemplateToString(config.SubstituteTemplate(s.options.AssetPathTemplate, config.PathPlaceholders{ - Dir: &dir, - Name: &base, - Hash: &hash, - Ext: &templateExt, - })) + originalExt - - // Optionally add metadata about the file - var jsonMetadataChunk string - if s.options.NeedsMetafile { - inputs := fmt.Sprintf("{\n %s: {\n \"bytesInOutput\": %d\n }\n }", - js_printer.QuoteForJSON(result.file.inputFile.Source.PrettyPath, s.options.ASCIIOnly), - len(bytes), - ) - jsonMetadataChunk = fmt.Sprintf( - "{\n \"imports\": [],\n \"exports\": [],\n \"inputs\": %s,\n \"bytes\": %d\n }", - inputs, - len(bytes), - ) - } - - // Generate the additional file to copy into the output directory - result.file.inputFile.AdditionalFiles = []graph.OutputFile{{ - AbsPath: s.fs.Join(s.options.AbsOutputDir, relPath), - Contents: bytes, - JSONMetadataChunk: jsonMetadataChunk, - }} - } - - s.results[i] = result - } - - // The linker operates on an array of files, so construct that now. This - // can't be constructed earlier because we generate new parse results for - // JavaScript stub files for CSS imports above. - files := make([]scannerFile, len(s.results)) - for sourceIndex := range s.results { - if result := &s.results[sourceIndex]; result.ok { - s.validateTLA(uint32(sourceIndex)) - files[sourceIndex] = result.file - } - } - return files -} - -func (s *scanner) validateTLA(sourceIndex uint32) tlaCheck { - result := &s.results[sourceIndex] - - if result.ok && result.tlaCheck.depth == 0 { - if repr, ok := result.file.inputFile.Repr.(*graph.JSRepr); ok { - result.tlaCheck.depth = 1 - if repr.AST.TopLevelAwaitKeyword.Len > 0 { - result.tlaCheck.parent = ast.MakeIndex32(sourceIndex) - } - - for importRecordIndex, record := range repr.AST.ImportRecords { - if record.SourceIndex.IsValid() && (record.Kind == ast.ImportRequire || record.Kind == ast.ImportStmt) { - parent := s.validateTLA(record.SourceIndex.GetIndex()) - if !parent.parent.IsValid() { - continue - } - - // Follow any import chains - if record.Kind == ast.ImportStmt && (!result.tlaCheck.parent.IsValid() || parent.depth < result.tlaCheck.depth) { - result.tlaCheck.depth = parent.depth + 1 - result.tlaCheck.parent = record.SourceIndex - result.tlaCheck.importRecordIndex = uint32(importRecordIndex) - continue - } - - // Require of a top-level await chain is forbidden - if record.Kind == ast.ImportRequire { - var notes []logger.MsgData - var tlaPrettyPath string - otherSourceIndex := record.SourceIndex.GetIndex() - - // Build up a chain of relevant notes for all of the imports - for { - parentResult := &s.results[otherSourceIndex] - parentRepr := parentResult.file.inputFile.Repr.(*graph.JSRepr) - - if parentRepr.AST.TopLevelAwaitKeyword.Len > 0 { - tlaPrettyPath = parentResult.file.inputFile.Source.PrettyPath - tracker := logger.MakeLineColumnTracker(&parentResult.file.inputFile.Source) - notes = append(notes, tracker.MsgData(parentRepr.AST.TopLevelAwaitKeyword, - fmt.Sprintf("The top-level await in %q is here:", tlaPrettyPath))) - break - } - - if !parentResult.tlaCheck.parent.IsValid() { - notes = append(notes, logger.MsgData{Text: "unexpected invalid index"}) - break - } - - otherSourceIndex = parentResult.tlaCheck.parent.GetIndex() - - tracker := logger.MakeLineColumnTracker(&parentResult.file.inputFile.Source) - notes = append(notes, tracker.MsgData( - parentRepr.AST.ImportRecords[parent.importRecordIndex].Range, - fmt.Sprintf("The file %q imports the file %q here:", - parentResult.file.inputFile.Source.PrettyPath, s.results[otherSourceIndex].file.inputFile.Source.PrettyPath))) - } - - var text string - importedPrettyPath := s.results[record.SourceIndex.GetIndex()].file.inputFile.Source.PrettyPath - - if importedPrettyPath == tlaPrettyPath { - text = fmt.Sprintf("This require call is not allowed because the imported file %q contains a top-level await", - importedPrettyPath) - } else { - text = fmt.Sprintf("This require call is not allowed because the transitive dependency %q contains a top-level await", - tlaPrettyPath) - } - - tracker := logger.MakeLineColumnTracker(&result.file.inputFile.Source) - s.log.AddWithNotes(logger.Error, &tracker, record.Range, text, notes) - } - } - } - - // Make sure that if we wrap this module in a closure, the closure is also - // async. This happens when you call "import()" on this module and code - // splitting is off. - if result.tlaCheck.parent.IsValid() { - repr.Meta.IsAsyncOrHasAsyncDependency = true - } - } - } - - return result.tlaCheck -} - -func DefaultExtensionToLoaderMap() map[string]config.Loader { - return map[string]config.Loader{ - ".js": config.LoaderJS, - ".mjs": config.LoaderJS, - ".cjs": config.LoaderJS, - ".jsx": config.LoaderJSX, - ".ts": config.LoaderTS, - ".cts": config.LoaderTSNoAmbiguousLessThan, - ".mts": config.LoaderTSNoAmbiguousLessThan, - ".tsx": config.LoaderTSX, - ".css": config.LoaderCSS, - ".json": config.LoaderJSON, - ".txt": config.LoaderText, - } -} - -func applyOptionDefaults(options *config.Options) { - if options.ExtensionToLoader == nil { - options.ExtensionToLoader = DefaultExtensionToLoaderMap() - } - if options.OutputExtensionJS == "" { - options.OutputExtensionJS = ".js" - } - if options.OutputExtensionCSS == "" { - options.OutputExtensionCSS = ".css" - } - - // Configure default path templates - if len(options.EntryPathTemplate) == 0 { - options.EntryPathTemplate = []config.PathTemplate{ - {Data: "./", Placeholder: config.DirPlaceholder}, - {Data: "/", Placeholder: config.NamePlaceholder}, - } - } - if len(options.ChunkPathTemplate) == 0 { - options.ChunkPathTemplate = []config.PathTemplate{ - {Data: "./", Placeholder: config.NamePlaceholder}, - {Data: "-", Placeholder: config.HashPlaceholder}, - } - } - if len(options.AssetPathTemplate) == 0 { - options.AssetPathTemplate = []config.PathTemplate{ - {Data: "./", Placeholder: config.NamePlaceholder}, - {Data: "-", Placeholder: config.HashPlaceholder}, - } - } - - options.ProfilerNames = !options.MinifyIdentifiers -} - -func (b *Bundle) Compile(log logger.Log, options config.Options, timer *helpers.Timer) ([]graph.OutputFile, string) { - timer.Begin("Compile phase") - defer timer.End("Compile phase") - - applyOptionDefaults(&options) - - // The format can't be "preserve" while bundling - if options.Mode == config.ModeBundle && options.OutputFormat == config.FormatPreserve { - options.OutputFormat = config.FormatESModule - } - - files := make([]graph.InputFile, len(b.files)) - for i, file := range b.files { - files[i] = file.inputFile - } - - // Get the base path from the options or choose the lowest common ancestor of all entry points - allReachableFiles := findReachableFiles(files, b.entryPoints) - - // Compute source map data in parallel with linking - timer.Begin("Spawn source map tasks") - dataForSourceMaps := b.computeDataForSourceMapsInParallel(&options, allReachableFiles) - timer.End("Spawn source map tasks") - - var resultGroups [][]graph.OutputFile - if options.CodeSplitting || len(b.entryPoints) == 1 { - // If code splitting is enabled or if there's only one entry point, link all entry points together - resultGroups = [][]graph.OutputFile{link( - &options, timer, log, b.fs, b.res, files, b.entryPoints, b.uniqueKeyPrefix, allReachableFiles, dataForSourceMaps)} - } else { - // Otherwise, link each entry point with the runtime file separately - waitGroup := sync.WaitGroup{} - resultGroups = make([][]graph.OutputFile, len(b.entryPoints)) - for i, entryPoint := range b.entryPoints { - waitGroup.Add(1) - go func(i int, entryPoint graph.EntryPoint) { - entryPoints := []graph.EntryPoint{entryPoint} - forked := timer.Fork() - reachableFiles := findReachableFiles(files, entryPoints) - resultGroups[i] = link( - &options, forked, log, b.fs, b.res, files, entryPoints, b.uniqueKeyPrefix, reachableFiles, dataForSourceMaps) - timer.Join(forked) - waitGroup.Done() - }(i, entryPoint) - } - waitGroup.Wait() - } - - // Join the results in entry point order for determinism - var outputFiles []graph.OutputFile - for _, group := range resultGroups { - outputFiles = append(outputFiles, group...) - } - - // Also generate the metadata file if necessary - var metafileJSON string - if options.NeedsMetafile { - timer.Begin("Generate metadata JSON") - metafileJSON = b.generateMetadataJSON(outputFiles, allReachableFiles, options.ASCIIOnly) - timer.End("Generate metadata JSON") - } - - if !options.WriteToStdout { - // Make sure an output file never overwrites an input file - if !options.AllowOverwrite { - sourceAbsPaths := make(map[string]uint32) - for _, sourceIndex := range allReachableFiles { - keyPath := b.files[sourceIndex].inputFile.Source.KeyPath - if keyPath.Namespace == "file" { - absPathKey := canonicalFileSystemPathForWindows(keyPath.Text) - sourceAbsPaths[absPathKey] = sourceIndex - } - } - for _, outputFile := range outputFiles { - absPathKey := canonicalFileSystemPathForWindows(outputFile.AbsPath) - if sourceIndex, ok := sourceAbsPaths[absPathKey]; ok { - hint := "" - switch logger.API { - case logger.CLIAPI: - hint = " (use \"--allow-overwrite\" to allow this)" - case logger.JSAPI: - hint = " (use \"allowOverwrite: true\" to allow this)" - case logger.GoAPI: - hint = " (use \"AllowOverwrite: true\" to allow this)" - } - log.Add(logger.Error, nil, logger.Range{}, - fmt.Sprintf("Refusing to overwrite input file %q%s", - b.files[sourceIndex].inputFile.Source.PrettyPath, hint)) - } - } - } - - // Make sure an output file never overwrites another output file. This - // is almost certainly unintentional and would otherwise happen silently. - // - // Make an exception for files that have identical contents. In that case - // the duplicate is just silently filtered out. This can happen with the - // "file" loader, for example. - outputFileMap := make(map[string][]byte) - end := 0 - for _, outputFile := range outputFiles { - absPathKey := canonicalFileSystemPathForWindows(outputFile.AbsPath) - contents, ok := outputFileMap[absPathKey] - - // If this isn't a duplicate, keep the output file - if !ok { - outputFileMap[absPathKey] = outputFile.Contents - outputFiles[end] = outputFile - end++ - continue - } - - // If the names and contents are both the same, only keep the first one - if bytes.Equal(contents, outputFile.Contents) { - continue - } - - // Otherwise, generate an error - outputPath := outputFile.AbsPath - if relPath, ok := b.fs.Rel(b.fs.Cwd(), outputPath); ok { - outputPath = relPath - } - log.Add(logger.Error, nil, logger.Range{}, "Two output files share the same path but have different contents: "+outputPath) - } - outputFiles = outputFiles[:end] - } - - return outputFiles, metafileJSON -} - -// Find all files reachable from all entry points. This order should be -// deterministic given that the entry point order is deterministic, since the -// returned order is the postorder of the graph traversal and import record -// order within a given file is deterministic. -func findReachableFiles(files []graph.InputFile, entryPoints []graph.EntryPoint) []uint32 { - visited := make(map[uint32]bool) - var order []uint32 - var visit func(uint32) - - // Include this file and all files it imports - visit = func(sourceIndex uint32) { - if !visited[sourceIndex] { - visited[sourceIndex] = true - file := &files[sourceIndex] - if repr, ok := file.Repr.(*graph.JSRepr); ok && repr.CSSSourceIndex.IsValid() { - visit(repr.CSSSourceIndex.GetIndex()) - } - for _, record := range *file.Repr.ImportRecords() { - if record.SourceIndex.IsValid() { - visit(record.SourceIndex.GetIndex()) - } - } - - // Each file must come after its dependencies - order = append(order, sourceIndex) - } - } - - // The runtime is always included in case it's needed - visit(runtime.SourceIndex) - - // Include all files reachable from any entry point - for _, entryPoint := range entryPoints { - visit(entryPoint.SourceIndex) - } - - return order -} - -// This is done in parallel with linking because linking is a mostly serial -// phase and there are extra resources for parallelism. This could also be done -// during parsing but that would slow down parsing and delay the start of the -// linking phase, which then delays the whole bundling process. -// -// However, doing this during parsing would allow it to be cached along with -// the parsed ASTs which would then speed up incremental builds. In the future -// it could be good to optionally have this be computed during the parsing -// phase when incremental builds are active but otherwise still have it be -// computed during linking for optimal speed during non-incremental builds. -func (b *Bundle) computeDataForSourceMapsInParallel(options *config.Options, reachableFiles []uint32) func() []dataForSourceMap { - if options.SourceMap == config.SourceMapNone { - return func() []dataForSourceMap { - return nil - } - } - - var waitGroup sync.WaitGroup - results := make([]dataForSourceMap, len(b.files)) - - for _, sourceIndex := range reachableFiles { - if f := &b.files[sourceIndex]; f.inputFile.Loader.CanHaveSourceMap() { - var approximateLineCount int32 - switch repr := f.inputFile.Repr.(type) { - case *graph.JSRepr: - approximateLineCount = repr.AST.ApproximateLineCount - case *graph.CSSRepr: - approximateLineCount = repr.AST.ApproximateLineCount - } - waitGroup.Add(1) - go func(sourceIndex uint32, f *scannerFile, approximateLineCount int32) { - result := &results[sourceIndex] - result.lineOffsetTables = sourcemap.GenerateLineOffsetTables(f.inputFile.Source.Contents, approximateLineCount) - sm := f.inputFile.InputSourceMap - if !options.ExcludeSourcesContent { - if sm == nil { - // Simple case: no nested source map - result.quotedContents = [][]byte{js_printer.QuoteForJSON(f.inputFile.Source.Contents, options.ASCIIOnly)} - } else { - // Complex case: nested source map - result.quotedContents = make([][]byte, len(sm.Sources)) - nullContents := []byte("null") - for i := range sm.Sources { - // Missing contents become a "null" literal - quotedContents := nullContents - if i < len(sm.SourcesContent) { - if value := sm.SourcesContent[i]; value.Quoted != "" { - if options.ASCIIOnly && !isASCIIOnly(value.Quoted) { - // Re-quote non-ASCII values if output is ASCII-only - quotedContents = js_printer.QuoteForJSON(js_lexer.UTF16ToString(value.Value), options.ASCIIOnly) - } else { - // Otherwise just use the value directly from the input file - quotedContents = []byte(value.Quoted) - } - } - } - result.quotedContents[i] = quotedContents - } - } - } - waitGroup.Done() - }(sourceIndex, f, approximateLineCount) - } - } - - return func() []dataForSourceMap { - waitGroup.Wait() - return results - } -} - -func (b *Bundle) generateMetadataJSON(results []graph.OutputFile, allReachableFiles []uint32, asciiOnly bool) string { - sb := strings.Builder{} - sb.WriteString("{\n \"inputs\": {") - - // Write inputs - isFirst := true - for _, sourceIndex := range allReachableFiles { - if sourceIndex == runtime.SourceIndex { - continue - } - if file := &b.files[sourceIndex]; len(file.jsonMetadataChunk) > 0 { - if isFirst { - isFirst = false - sb.WriteString("\n ") - } else { - sb.WriteString(",\n ") - } - sb.WriteString(file.jsonMetadataChunk) - } - } - - sb.WriteString("\n },\n \"outputs\": {") - - // Write outputs - isFirst = true - paths := make(map[string]bool) - for _, result := range results { - if len(result.JSONMetadataChunk) > 0 { - path := b.res.PrettyPath(logger.Path{Text: result.AbsPath, Namespace: "file"}) - if paths[path] { - // Don't write out the same path twice (can happen with the "file" loader) - continue - } - if isFirst { - isFirst = false - sb.WriteString("\n ") - } else { - sb.WriteString(",\n ") - } - paths[path] = true - sb.WriteString(fmt.Sprintf("%s: ", js_printer.QuoteForJSON(path, asciiOnly))) - sb.WriteString(result.JSONMetadataChunk) - } - } - - sb.WriteString("\n }\n}\n") - return sb.String() -} - -type runtimeCacheKey struct { - MangleSyntax bool - MinifyIdentifiers bool - ES6 bool -} - -type runtimeCache struct { - astMutex sync.Mutex - astMap map[runtimeCacheKey]js_ast.AST -} - -var globalRuntimeCache runtimeCache - -func (cache *runtimeCache) parseRuntime(options *config.Options) (source logger.Source, runtimeAST js_ast.AST, ok bool) { - key := runtimeCacheKey{ - // All configuration options that the runtime code depends on must go here - MangleSyntax: options.MangleSyntax, - MinifyIdentifiers: options.MinifyIdentifiers, - ES6: runtime.CanUseES6(options.UnsupportedJSFeatures), - } - - // Determine which source to use - if key.ES6 { - source = runtime.ES6Source - } else { - source = runtime.ES5Source - } - - // Cache hit? - (func() { - cache.astMutex.Lock() - defer cache.astMutex.Unlock() - if cache.astMap != nil { - runtimeAST, ok = cache.astMap[key] - } - })() - if ok { - return - } - - // Cache miss - var constraint int - if key.ES6 { - constraint = 2015 - } else { - constraint = 5 - } - log := logger.NewDeferLog(logger.DeferLogAll) - runtimeAST, ok = js_parser.Parse(log, source, js_parser.OptionsFromConfig(&config.Options{ - // These configuration options must only depend on the key - MangleSyntax: key.MangleSyntax, - MinifyIdentifiers: key.MinifyIdentifiers, - UnsupportedJSFeatures: compat.UnsupportedJSFeatures( - map[compat.Engine][]int{compat.ES: {constraint}}), - - // Always do tree shaking for the runtime because we never want to - // include unnecessary runtime code - TreeShaking: true, - })) - if log.HasErrors() { - msgs := "Internal error: failed to parse runtime:\n" - for _, msg := range log.Done() { - msgs += msg.String(logger.OutputOptions{}, logger.TerminalInfo{}) - } - panic(msgs[:len(msgs)-1]) - } - - // Cache for next time - if ok { - cache.astMutex.Lock() - defer cache.astMutex.Unlock() - if cache.astMap == nil { - cache.astMap = make(map[runtimeCacheKey]js_ast.AST) - } - cache.astMap[key] = runtimeAST - } - return -} diff --git a/vendor/github.com/evanw/esbuild/internal/bundler/debug.go b/vendor/github.com/evanw/esbuild/internal/bundler/debug.go deleted file mode 100644 index 731a34f..0000000 --- a/vendor/github.com/evanw/esbuild/internal/bundler/debug.go +++ /dev/null @@ -1,132 +0,0 @@ -package bundler - -import ( - "fmt" - "strings" - - "github.com/evanw/esbuild/internal/ast" - "github.com/evanw/esbuild/internal/graph" - "github.com/evanw/esbuild/internal/js_ast" - "github.com/evanw/esbuild/internal/js_printer" -) - -// Set this to true and then load the resulting metafile in "graph-debugger.html" -// to debug graph information. -// -// This is deliberately not exposed in the final binary. It is *very* internal -// and only exists to help debug esbuild itself. Make sure this is always set -// back to false before committing. -const debugVerboseMetafile = false - -func (c *linkerContext) generateExtraDataForFileJS(sourceIndex uint32) string { - if !debugVerboseMetafile { - return "" - } - - file := &c.graph.Files[sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - sb := strings.Builder{} - - quoteSym := func(ref js_ast.Ref) string { - name := fmt.Sprintf("%d:%d [%s]", ref.SourceIndex, ref.InnerIndex, c.graph.Symbols.Get(ref).OriginalName) - return string(js_printer.QuoteForJSON(name, c.options.ASCIIOnly)) - } - - sb.WriteString(`,"parts":[`) - for partIndex, part := range repr.AST.Parts { - if partIndex > 0 { - sb.WriteByte(',') - } - var isFirst bool - code := "" - - sb.WriteString(fmt.Sprintf(`{"isLive":%v`, part.IsLive)) - sb.WriteString(fmt.Sprintf(`,"canBeRemovedIfUnused":%v`, part.CanBeRemovedIfUnused)) - - if partIndex == int(js_ast.NSExportPartIndex) { - sb.WriteString(`,"nsExportPartIndex":true`) - } else if ast.MakeIndex32(uint32(partIndex)) == repr.Meta.WrapperPartIndex { - sb.WriteString(`,"wrapperPartIndex":true`) - } else if len(part.Stmts) > 0 { - start := part.Stmts[0].Loc.Start - end := len(file.InputFile.Source.Contents) - if partIndex+1 < len(repr.AST.Parts) { - if nextStmts := repr.AST.Parts[partIndex+1].Stmts; len(nextStmts) > 0 { - if nextStart := nextStmts[0].Loc.Start; nextStart >= start { - end = int(nextStart) - } - } - } - code = file.InputFile.Source.Contents[start:end] - } - - // importRecords - sb.WriteString(`,"importRecords":[`) - isFirst = true - for _, importRecordIndex := range part.ImportRecordIndices { - record := repr.AST.ImportRecords[importRecordIndex] - if !record.SourceIndex.IsValid() { - continue - } - if isFirst { - isFirst = false - } else { - sb.WriteByte(',') - } - path := c.graph.Files[record.SourceIndex.GetIndex()].InputFile.Source.PrettyPath - sb.WriteString(fmt.Sprintf(`{"source":%s}`, js_printer.QuoteForJSON(path, c.options.ASCIIOnly))) - } - sb.WriteByte(']') - - // declaredSymbols - sb.WriteString(`,"declaredSymbols":[`) - isFirst = true - for _, declSym := range part.DeclaredSymbols { - if !declSym.IsTopLevel { - continue - } - if isFirst { - isFirst = false - } else { - sb.WriteByte(',') - } - sb.WriteString(fmt.Sprintf(`{"name":%s}`, quoteSym(declSym.Ref))) - } - sb.WriteByte(']') - - // symbolUses - sb.WriteString(`,"symbolUses":[`) - isFirst = true - for ref, uses := range part.SymbolUses { - if isFirst { - isFirst = false - } else { - sb.WriteByte(',') - } - sb.WriteString(fmt.Sprintf(`{"name":%s,"countEstimate":%d}`, quoteSym(ref), uses.CountEstimate)) - } - sb.WriteByte(']') - - // dependencies - sb.WriteString(`,"dependencies":[`) - for i, dep := range part.Dependencies { - if i > 0 { - sb.WriteByte(',') - } - sb.WriteString(fmt.Sprintf(`{"source":%s,"partIndex":%d}`, - js_printer.QuoteForJSON(c.graph.Files[dep.SourceIndex].InputFile.Source.PrettyPath, c.options.ASCIIOnly), - dep.PartIndex, - )) - } - sb.WriteByte(']') - - // code - sb.WriteString(`,"code":`) - sb.Write(js_printer.QuoteForJSON(strings.TrimRight(code, "\n"), c.options.ASCIIOnly)) - - sb.WriteByte('}') - } - sb.WriteString(`]`) - - return sb.String() -} diff --git a/vendor/github.com/evanw/esbuild/internal/bundler/linker.go b/vendor/github.com/evanw/esbuild/internal/bundler/linker.go deleted file mode 100644 index 31b102f..0000000 --- a/vendor/github.com/evanw/esbuild/internal/bundler/linker.go +++ /dev/null @@ -1,5581 +0,0 @@ -package bundler - -import ( - "bytes" - "encoding/base64" - "encoding/binary" - "fmt" - "hash" - "path" - "sort" - "strings" - "sync" - - "github.com/evanw/esbuild/internal/ast" - "github.com/evanw/esbuild/internal/compat" - "github.com/evanw/esbuild/internal/config" - "github.com/evanw/esbuild/internal/css_ast" - "github.com/evanw/esbuild/internal/css_printer" - "github.com/evanw/esbuild/internal/fs" - "github.com/evanw/esbuild/internal/graph" - "github.com/evanw/esbuild/internal/helpers" - "github.com/evanw/esbuild/internal/js_ast" - "github.com/evanw/esbuild/internal/js_lexer" - "github.com/evanw/esbuild/internal/js_printer" - "github.com/evanw/esbuild/internal/logger" - "github.com/evanw/esbuild/internal/renamer" - "github.com/evanw/esbuild/internal/resolver" - "github.com/evanw/esbuild/internal/runtime" - "github.com/evanw/esbuild/internal/sourcemap" - "github.com/evanw/esbuild/internal/xxhash" -) - -type linkerContext struct { - options *config.Options - timer *helpers.Timer - log logger.Log - fs fs.FS - res resolver.Resolver - graph graph.LinkerGraph - - // This helps avoid an infinite loop when matching imports to exports - cycleDetector []importTracker - - // We may need to refer to the CommonJS "module" symbol for exports - unboundModuleRef js_ast.Ref - - // We may need to refer to the "__esm" and/or "__commonJS" runtime symbols - cjsRuntimeRef js_ast.Ref - esmRuntimeRef js_ast.Ref - - // This represents the parallel computation of source map related data. - // Calling this will block until the computation is done. The resulting value - // is shared between threads and must be treated as immutable. - dataForSourceMaps func() []dataForSourceMap - - // This is passed to us from the bundling phase - uniqueKeyPrefix string - uniqueKeyPrefixBytes []byte // This is just "uniqueKeyPrefix" in byte form -} - -type partRange struct { - sourceIndex uint32 - partIndexBegin uint32 - partIndexEnd uint32 -} - -type chunkInfo struct { - // This is a random string and is used to represent the output path of this - // chunk before the final output path has been computed. - uniqueKey string - - filesWithPartsInChunk map[uint32]bool - entryBits helpers.BitSet - - // This information is only useful if "isEntryPoint" is true - isEntryPoint bool - sourceIndex uint32 // An index into "c.sources" - entryPointBit uint // An index into "c.graph.EntryPoints" - - // For code splitting - crossChunkImports []chunkImport - - // This is the representation-specific information - chunkRepr chunkRepr - - // This is the final path of this chunk relative to the output directory, but - // without the substitution of the final hash (since it hasn't been computed). - finalTemplate []config.PathTemplate - - // This is the final path of this chunk relative to the output directory. It - // is the substitution of the final hash into "finalTemplate". - finalRelPath string - - // If non-empty, this chunk needs to generate an external legal comments file. - externalLegalComments []byte - - // When this chunk is initially generated in isolation, the output pieces - // will contain slices of the output with the unique keys of other chunks - // omitted. - intermediateOutput intermediateOutput - - // This contains the hash for just this chunk without including information - // from the hashes of other chunks. Later on in the linking process, the - // final hash for this chunk will be constructed by merging the isolated - // hashes of all transitive dependencies of this chunk. This is separated - // into two phases like this to handle cycles in the chunk import graph. - waitForIsolatedHash func() []byte - - // Other fields relating to the output file for this chunk - jsonMetadataChunkCallback func(finalOutputSize int) helpers.Joiner - outputSourceMap sourcemap.SourceMapPieces - isExecutable bool -} - -type chunkImport struct { - chunkIndex uint32 - importKind ast.ImportKind -} - -type outputPieceIndexKind uint8 - -const ( - outputPieceNone outputPieceIndexKind = iota - outputPieceAssetIndex - outputPieceChunkIndex -) - -// This is a chunk of source code followed by a reference to another chunk. For -// example, the file "@import 'CHUNK0001'; body { color: black; }" would be -// represented by two pieces, one with the data "@import '" and another with the -// data "'; body { color: black; }". The first would have the chunk index 1 and -// the second would have an invalid chunk index. -type outputPiece struct { - data []byte - - // Note: The "kind" may be "outputPieceNone" in which case there is one piece - // with data and no chunk index. For example, the chunk may not contain any - // imports. - index uint32 - kind outputPieceIndexKind -} - -type intermediateOutput struct { - // If the chunk doesn't have any references to other chunks, then "pieces" is - // nil and "joiner" contains the contents of the chunk. This is more efficient - // because it avoids doing a join operation twice. - joiner helpers.Joiner - - // Otherwise, "pieces" contains the contents of the chunk and "joiner" should - // not be used. Another joiner will have to be constructed later when merging - // the pieces together. - pieces []outputPiece -} - -type chunkRepr interface{ isChunk() } - -func (*chunkReprJS) isChunk() {} -func (*chunkReprCSS) isChunk() {} - -type chunkReprJS struct { - filesInChunkInOrder []uint32 - partsInChunkInOrder []partRange - - // For code splitting - crossChunkPrefixStmts []js_ast.Stmt - crossChunkSuffixStmts []js_ast.Stmt - exportsToOtherChunks map[js_ast.Ref]string - importsFromOtherChunks map[uint32]crossChunkImportItemArray -} - -type chunkReprCSS struct { - externalImportsInOrder []externalImportCSS - filesInChunkInOrder []uint32 -} - -type externalImportCSS struct { - path logger.Path - conditions []css_ast.Token - conditionImportRecords []ast.ImportRecord -} - -// Returns a log where "log.HasErrors()" only returns true if any errors have -// been logged since this call. This is useful when there have already been -// errors logged by other linkers that share the same log. -func wrappedLog(log logger.Log) logger.Log { - var mutex sync.Mutex - var hasErrors bool - addMsg := log.AddMsg - - log.AddMsg = func(msg logger.Msg) { - if msg.Kind == logger.Error { - mutex.Lock() - defer mutex.Unlock() - hasErrors = true - } - addMsg(msg) - } - - log.HasErrors = func() bool { - mutex.Lock() - defer mutex.Unlock() - return hasErrors - } - - return log -} - -func link( - options *config.Options, - timer *helpers.Timer, - log logger.Log, - fs fs.FS, - res resolver.Resolver, - inputFiles []graph.InputFile, - entryPoints []graph.EntryPoint, - uniqueKeyPrefix string, - reachableFiles []uint32, - dataForSourceMaps func() []dataForSourceMap, -) []graph.OutputFile { - timer.Begin("Link") - defer timer.End("Link") - - log = wrappedLog(log) - - timer.Begin("Clone linker graph") - c := linkerContext{ - options: options, - timer: timer, - log: log, - fs: fs, - res: res, - dataForSourceMaps: dataForSourceMaps, - uniqueKeyPrefix: uniqueKeyPrefix, - uniqueKeyPrefixBytes: []byte(uniqueKeyPrefix), - graph: graph.CloneLinkerGraph( - inputFiles, - reachableFiles, - entryPoints, - options.CodeSplitting, - ), - } - timer.End("Clone linker graph") - - // Use a smaller version of these functions if we don't need profiler names - runtimeRepr := c.graph.Files[runtime.SourceIndex].InputFile.Repr.(*graph.JSRepr) - if c.options.ProfilerNames { - c.cjsRuntimeRef = runtimeRepr.AST.NamedExports["__commonJS"].Ref - c.esmRuntimeRef = runtimeRepr.AST.NamedExports["__esm"].Ref - } else { - c.cjsRuntimeRef = runtimeRepr.AST.NamedExports["__commonJSMin"].Ref - c.esmRuntimeRef = runtimeRepr.AST.NamedExports["__esmMin"].Ref - } - - for _, entryPoint := range entryPoints { - if repr, ok := c.graph.Files[entryPoint.SourceIndex].InputFile.Repr.(*graph.JSRepr); ok { - // Loaders default to CommonJS when they are the entry point and the output - // format is not ESM-compatible since that avoids generating the ESM-to-CJS - // machinery. - if repr.AST.HasLazyExport && (c.options.Mode == config.ModePassThrough || - (c.options.Mode == config.ModeConvertFormat && !c.options.OutputFormat.KeepES6ImportExportSyntax())) { - repr.AST.ExportsKind = js_ast.ExportsCommonJS - } - - // Entry points with ES6 exports must generate an exports object when - // targeting non-ES6 formats. Note that the IIFE format only needs this - // when the global name is present, since that's the only way the exports - // can actually be observed externally. - if repr.AST.ExportKeyword.Len > 0 && (options.OutputFormat == config.FormatCommonJS || - (options.OutputFormat == config.FormatIIFE && len(options.GlobalName) > 0)) { - repr.AST.UsesExportsRef = true - repr.Meta.ForceIncludeExportsForEntryPoint = true - } - } - } - - // Allocate a new unbound symbol called "module" in case we need it later - if c.options.OutputFormat == config.FormatCommonJS { - c.unboundModuleRef = c.graph.GenerateNewSymbol(runtime.SourceIndex, js_ast.SymbolUnbound, "module") - } else { - c.unboundModuleRef = js_ast.InvalidRef - } - - c.scanImportsAndExports() - - // Stop now if there were errors - if c.log.HasErrors() { - return []graph.OutputFile{} - } - - c.treeShakingAndCodeSplitting() - - if c.options.Mode == config.ModePassThrough { - for _, entryPoint := range c.graph.EntryPoints() { - c.preventExportsFromBeingRenamed(entryPoint.SourceIndex) - } - } - - chunks := c.computeChunks() - c.computeCrossChunkDependencies(chunks) - - // Make sure calls to "js_ast.FollowSymbols()" in parallel goroutines after this - // won't hit concurrent map mutation hazards - js_ast.FollowAllSymbols(c.graph.Symbols) - - return c.generateChunksInParallel(chunks) -} - -// Currently the automatic chunk generation algorithm should by construction -// never generate chunks that import each other since files are allocated to -// chunks based on which entry points they are reachable from. -// -// This will change in the future when we allow manual chunk labels. But before -// we allow manual chunk labels, we'll need to rework module initialization to -// allow code splitting chunks to be lazily-initialized. -// -// Since that work hasn't been finished yet, cycles in the chunk import graph -// can cause initialization bugs. So let's forbid these cycles for now to guard -// against code splitting bugs that could cause us to generate buggy chunks. -func (c *linkerContext) enforceNoCyclicChunkImports(chunks []chunkInfo) { - var validate func(int, []int) - validate = func(chunkIndex int, path []int) { - for _, otherChunkIndex := range path { - if chunkIndex == otherChunkIndex { - c.log.Add(logger.Error, nil, logger.Range{}, "Internal error: generated chunks contain a circular import") - return - } - } - path = append(path, chunkIndex) - for _, chunkImport := range chunks[chunkIndex].crossChunkImports { - // Ignore cycles caused by dynamic "import()" expressions. These are fine - // because they don't necessarily cause initialization order issues and - // they don't indicate a bug in our chunk generation algorithm. They arise - // normally in real code (e.g. two files that import each other). - if chunkImport.importKind != ast.ImportDynamic { - validate(int(chunkImport.chunkIndex), path) - } - } - } - path := make([]int, 0, len(chunks)) - for i := range chunks { - validate(i, path) - } -} - -func (c *linkerContext) generateChunksInParallel(chunks []chunkInfo) []graph.OutputFile { - c.timer.Begin("Generate chunks") - defer c.timer.End("Generate chunks") - - // Generate each chunk on a separate goroutine - generateWaitGroup := sync.WaitGroup{} - generateWaitGroup.Add(len(chunks)) - for chunkIndex := range chunks { - switch chunks[chunkIndex].chunkRepr.(type) { - case *chunkReprJS: - go c.generateChunkJS(chunks, chunkIndex, &generateWaitGroup) - case *chunkReprCSS: - go c.generateChunkCSS(chunks, chunkIndex, &generateWaitGroup) - } - } - c.enforceNoCyclicChunkImports(chunks) - generateWaitGroup.Wait() - - // Compute the final hashes of each chunk. This can technically be done in - // parallel but it probably doesn't matter so much because we're not hashing - // that much data. - visited := make([]uint32, len(chunks)) - var finalBytes []byte - for chunkIndex := range chunks { - chunk := &chunks[chunkIndex] - var hashSubstitution *string - - // Only wait for the hash if necessary - if config.HasPlaceholder(chunk.finalTemplate, config.HashPlaceholder) { - // Compute the final hash using the isolated hashes of the dependencies - hash := xxhash.New() - appendIsolatedHashesForImportedChunks(hash, chunks, uint32(chunkIndex), visited, ^uint32(chunkIndex)) - finalBytes = hash.Sum(finalBytes[:0]) - finalString := hashForFileName(finalBytes) - hashSubstitution = &finalString - } - - // Render the last remaining placeholder in the template - chunk.finalRelPath = config.TemplateToString(config.SubstituteTemplate(chunk.finalTemplate, config.PathPlaceholders{ - Hash: hashSubstitution, - })) - } - - // Generate the final output files by joining file pieces together - c.timer.Begin("Generate final output files") - var resultsWaitGroup sync.WaitGroup - results := make([][]graph.OutputFile, len(chunks)) - resultsWaitGroup.Add(len(chunks)) - for chunkIndex, chunk := range chunks { - go func(chunkIndex int, chunk chunkInfo) { - var outputFiles []graph.OutputFile - - // Each file may optionally contain additional files to be copied to the - // output directory. This is used by the "file" loader. - var commentPrefix string - var commentSuffix string - switch chunkRepr := chunk.chunkRepr.(type) { - case *chunkReprJS: - for _, sourceIndex := range chunkRepr.filesInChunkInOrder { - outputFiles = append(outputFiles, c.graph.Files[sourceIndex].InputFile.AdditionalFiles...) - } - commentPrefix = "//" - - case *chunkReprCSS: - for _, sourceIndex := range chunkRepr.filesInChunkInOrder { - outputFiles = append(outputFiles, c.graph.Files[sourceIndex].InputFile.AdditionalFiles...) - } - commentPrefix = "/*" - commentSuffix = " */" - } - - // Path substitution for the chunk itself - finalRelDir := c.fs.Dir(chunk.finalRelPath) - outputContentsJoiner, outputSourceMapShifts := c.substituteFinalPaths(chunks, chunk.intermediateOutput, - func(finalRelPathForImport string) string { - return c.pathBetweenChunks(finalRelDir, finalRelPathForImport) - }) - - // Generate the optional legal comments file for this chunk - if chunk.externalLegalComments != nil { - finalRelPathForLegalComments := chunk.finalRelPath + ".LEGAL.txt" - - // Link the file to the legal comments - if c.options.LegalComments == config.LegalCommentsLinkedWithComment { - importPath := c.pathBetweenChunks(finalRelDir, finalRelPathForLegalComments) - importPath = strings.TrimPrefix(importPath, "./") - outputContentsJoiner.EnsureNewlineAtEnd() - outputContentsJoiner.AddString("/*! For license information please see ") - outputContentsJoiner.AddString(importPath) - outputContentsJoiner.AddString(" */\n") - } - - // Write the external legal comments file - outputFiles = append(outputFiles, graph.OutputFile{ - AbsPath: c.fs.Join(c.options.AbsOutputDir, finalRelPathForLegalComments), - Contents: chunk.externalLegalComments, - JSONMetadataChunk: fmt.Sprintf( - "{\n \"imports\": [],\n \"exports\": [],\n \"inputs\": {},\n \"bytes\": %d\n }", len(chunk.externalLegalComments)), - }) - } - - // Generate the optional source map for this chunk - if c.options.SourceMap != config.SourceMapNone && chunk.outputSourceMap.HasContent() { - outputSourceMap := chunk.outputSourceMap.Finalize(outputSourceMapShifts) - finalRelPathForSourceMap := chunk.finalRelPath + ".map" - - // Potentially write a trailing source map comment - switch c.options.SourceMap { - case config.SourceMapLinkedWithComment: - importPath := c.pathBetweenChunks(finalRelDir, finalRelPathForSourceMap) - importPath = strings.TrimPrefix(importPath, "./") - outputContentsJoiner.EnsureNewlineAtEnd() - outputContentsJoiner.AddString(commentPrefix) - outputContentsJoiner.AddString("# sourceMappingURL=") - outputContentsJoiner.AddString(importPath) - outputContentsJoiner.AddString(commentSuffix) - outputContentsJoiner.AddString("\n") - - case config.SourceMapInline, config.SourceMapInlineAndExternal: - outputContentsJoiner.EnsureNewlineAtEnd() - outputContentsJoiner.AddString(commentPrefix) - outputContentsJoiner.AddString("# sourceMappingURL=data:application/json;base64,") - outputContentsJoiner.AddString(base64.StdEncoding.EncodeToString(outputSourceMap)) - outputContentsJoiner.AddString(commentSuffix) - outputContentsJoiner.AddString("\n") - } - - // Potentially write the external source map file - switch c.options.SourceMap { - case config.SourceMapLinkedWithComment, config.SourceMapInlineAndExternal, config.SourceMapExternalWithoutComment: - outputFiles = append(outputFiles, graph.OutputFile{ - AbsPath: c.fs.Join(c.options.AbsOutputDir, finalRelPathForSourceMap), - Contents: outputSourceMap, - JSONMetadataChunk: fmt.Sprintf( - "{\n \"imports\": [],\n \"exports\": [],\n \"inputs\": {},\n \"bytes\": %d\n }", len(outputSourceMap)), - }) - } - } - - // Finalize the output contents - outputContents := outputContentsJoiner.Done() - - // Path substitution for the JSON metadata - var jsonMetadataChunk string - if c.options.NeedsMetafile { - jsonMetadataChunkPieces := c.breakOutputIntoPieces(chunk.jsonMetadataChunkCallback(len(outputContents)), uint32(len(chunks))) - jsonMetadataChunkBytes, _ := c.substituteFinalPaths(chunks, jsonMetadataChunkPieces, func(finalRelPathForImport string) string { - return c.res.PrettyPath(logger.Path{Text: c.fs.Join(c.options.AbsOutputDir, finalRelPathForImport), Namespace: "file"}) - }) - jsonMetadataChunk = string(jsonMetadataChunkBytes.Done()) - } - - // Generate the output file for this chunk - outputFiles = append(outputFiles, graph.OutputFile{ - AbsPath: c.fs.Join(c.options.AbsOutputDir, chunk.finalRelPath), - Contents: outputContents, - JSONMetadataChunk: jsonMetadataChunk, - IsExecutable: chunk.isExecutable, - }) - - results[chunkIndex] = outputFiles - resultsWaitGroup.Done() - }(chunkIndex, chunk) - } - resultsWaitGroup.Wait() - c.timer.End("Generate final output files") - - // Merge the output files from the different goroutines together in order - outputFilesLen := 0 - for _, result := range results { - outputFilesLen += len(result) - } - outputFiles := make([]graph.OutputFile, 0, outputFilesLen) - for _, result := range results { - outputFiles = append(outputFiles, result...) - } - return outputFiles -} - -// Given a set of output pieces (i.e. a buffer already divided into the spans -// between import paths), substitute the final import paths in and then join -// everything into a single byte buffer. -func (c *linkerContext) substituteFinalPaths( - chunks []chunkInfo, - intermediateOutput intermediateOutput, - modifyPath func(string) string, -) (j helpers.Joiner, shifts []sourcemap.SourceMapShift) { - // Optimization: If there can be no substitutions, just reuse the initial - // joiner that was used when generating the intermediate chunk output - // instead of creating another one and copying the whole file into it. - if intermediateOutput.pieces == nil { - return intermediateOutput.joiner, []sourcemap.SourceMapShift{{}} - } - - var shift sourcemap.SourceMapShift - shifts = make([]sourcemap.SourceMapShift, 0, len(intermediateOutput.pieces)) - shifts = append(shifts, shift) - - for _, piece := range intermediateOutput.pieces { - var dataOffset sourcemap.LineColumnOffset - j.AddBytes(piece.data) - dataOffset.AdvanceBytes(piece.data) - shift.Before.Add(dataOffset) - shift.After.Add(dataOffset) - - switch piece.kind { - case outputPieceAssetIndex: - file := c.graph.Files[piece.index] - if len(file.InputFile.AdditionalFiles) != 1 { - panic("Internal error") - } - relPath, _ := c.fs.Rel(c.options.AbsOutputDir, file.InputFile.AdditionalFiles[0].AbsPath) - - // Make sure to always use forward slashes, even on Windows - relPath = strings.ReplaceAll(relPath, "\\", "/") - - importPath := modifyPath(relPath) - j.AddString(importPath) - shift.Before.AdvanceString(file.InputFile.UniqueKeyForFileLoader) - shift.After.AdvanceString(importPath) - shifts = append(shifts, shift) - - case outputPieceChunkIndex: - chunk := chunks[piece.index] - importPath := modifyPath(chunk.finalRelPath) - j.AddString(importPath) - shift.Before.AdvanceString(chunk.uniqueKey) - shift.After.AdvanceString(importPath) - shifts = append(shifts, shift) - } - } - - return -} - -func (c *linkerContext) pathBetweenChunks(fromRelDir string, toRelPath string) string { - // Join with the public path if it has been configured - if c.options.PublicPath != "" { - return joinWithPublicPath(c.options.PublicPath, toRelPath) - } - - // Otherwise, return a relative path - relPath, ok := c.fs.Rel(fromRelDir, toRelPath) - if !ok { - c.log.Add(logger.Error, nil, logger.Range{}, - fmt.Sprintf("Cannot traverse from directory %q to chunk %q", fromRelDir, toRelPath)) - return "" - } - - // Make sure to always use forward slashes, even on Windows - relPath = strings.ReplaceAll(relPath, "\\", "/") - - // Make sure the relative path doesn't start with a name, since that could - // be interpreted as a package path instead of a relative path - if !strings.HasPrefix(relPath, "./") && !strings.HasPrefix(relPath, "../") { - relPath = "./" + relPath - } - - return relPath -} - -// Returns the path of this file relative to "outbase", which is then ready to -// be joined with the absolute output directory path. The directory and name -// components are returned separately for convenience. -func pathRelativeToOutbase( - inputFile *graph.InputFile, - options *config.Options, - fs fs.FS, - avoidIndex bool, - customFilePath string, -) (relDir string, baseName string) { - relDir = "/" - absPath := inputFile.Source.KeyPath.Text - - if customFilePath != "" { - // Use the configured output path if present - absPath = customFilePath - if !fs.IsAbs(absPath) { - absPath = fs.Join(options.AbsOutputBase, absPath) - } - } else if inputFile.Source.KeyPath.Namespace != "file" { - // Come up with a path for virtual paths (i.e. non-file-system paths) - dir, base, _ := logger.PlatformIndependentPathDirBaseExt(absPath) - if avoidIndex && base == "index" { - _, base, _ = logger.PlatformIndependentPathDirBaseExt(dir) - } - baseName = sanitizeFilePathForVirtualModulePath(base) - return - } else { - // Heuristic: If the file is named something like "index.js", then use - // the name of the parent directory instead. This helps avoid the - // situation where many chunks are named "index" because of people - // dynamically-importing npm packages that make use of node's implicit - // "index" file name feature. - if avoidIndex { - base := fs.Base(absPath) - base = base[:len(base)-len(fs.Ext(base))] - if base == "index" { - absPath = fs.Dir(absPath) - } - } - } - - // Try to get a relative path to the base directory - relPath, ok := fs.Rel(options.AbsOutputBase, absPath) - if !ok { - // This can fail in some situations such as on different drives on - // Windows. In that case we just use the file name. - baseName = fs.Base(absPath) - } else { - // Now we finally have a relative path - relDir = fs.Dir(relPath) + "/" - baseName = fs.Base(relPath) - - // Use platform-independent slashes - relDir = strings.ReplaceAll(relDir, "\\", "/") - - // Replace leading "../" so we don't try to write outside of the output - // directory. This normally can't happen because "AbsOutputBase" is - // automatically computed to contain all entry point files, but it can - // happen if someone sets it manually via the "outbase" API option. - // - // Note that we can't just strip any leading "../" because that could - // cause two separate entry point paths to collide. For example, there - // could be both "src/index.js" and "../src/index.js" as entry points. - dotDotCount := 0 - for strings.HasPrefix(relDir[dotDotCount*3:], "../") { - dotDotCount++ - } - if dotDotCount > 0 { - // The use of "_.._" here is somewhat arbitrary but it is unlikely to - // collide with a folder named by a human and it works on Windows - // (Windows doesn't like names that end with a "."). And not starting - // with a "." means that it will not be hidden on Unix. - relDir = strings.Repeat("_.._/", dotDotCount) + relDir[dotDotCount*3:] - } - for strings.HasSuffix(relDir, "/") { - relDir = relDir[:len(relDir)-1] - } - relDir = "/" + relDir - if strings.HasSuffix(relDir, "/.") { - relDir = relDir[:len(relDir)-1] - } - } - - // Strip the file extension if the output path is an input file - if customFilePath == "" { - ext := fs.Ext(baseName) - baseName = baseName[:len(baseName)-len(ext)] - } - return -} - -func (c *linkerContext) computeCrossChunkDependencies(chunks []chunkInfo) { - c.timer.Begin("Compute cross-chunk dependencies") - defer c.timer.End("Compute cross-chunk dependencies") - - jsChunks := 0 - for _, chunk := range chunks { - if _, ok := chunk.chunkRepr.(*chunkReprJS); ok { - jsChunks++ - } - } - if jsChunks < 2 { - // No need to compute cross-chunk dependencies if there can't be any - return - } - - type chunkMeta struct { - imports map[js_ast.Ref]bool - exports map[js_ast.Ref]bool - dynamicImports map[int]bool - } - - chunkMetas := make([]chunkMeta, len(chunks)) - - // For each chunk, see what symbols it uses from other chunks. Do this in - // parallel because it's the most expensive part of this function. - waitGroup := sync.WaitGroup{} - waitGroup.Add(len(chunks)) - for chunkIndex, chunk := range chunks { - go func(chunkIndex int, chunk chunkInfo) { - chunkMeta := &chunkMetas[chunkIndex] - imports := make(map[js_ast.Ref]bool) - chunkMeta.imports = imports - chunkMeta.exports = make(map[js_ast.Ref]bool) - - // Go over each file in this chunk - for sourceIndex := range chunk.filesWithPartsInChunk { - // Go over each part in this file that's marked for inclusion in this chunk - switch repr := c.graph.Files[sourceIndex].InputFile.Repr.(type) { - case *graph.JSRepr: - for partIndex, partMeta := range repr.AST.Parts { - if !partMeta.IsLive { - continue - } - part := &repr.AST.Parts[partIndex] - - // Rewrite external dynamic imports to point to the chunk for that entry point - for _, importRecordIndex := range part.ImportRecordIndices { - record := &repr.AST.ImportRecords[importRecordIndex] - if record.SourceIndex.IsValid() && c.isExternalDynamicImport(record, sourceIndex) { - otherChunkIndex := c.graph.Files[record.SourceIndex.GetIndex()].EntryPointChunkIndex - record.Path.Text = chunks[otherChunkIndex].uniqueKey - record.SourceIndex = ast.Index32{} - - // Track this cross-chunk dynamic import so we make sure to - // include its hash when we're calculating the hashes of all - // dependencies of this chunk. - if int(otherChunkIndex) != chunkIndex { - if chunkMeta.dynamicImports == nil { - chunkMeta.dynamicImports = make(map[int]bool) - } - chunkMeta.dynamicImports[int(otherChunkIndex)] = true - } - } - } - - // Remember what chunk each top-level symbol is declared in. Symbols - // with multiple declarations such as repeated "var" statements with - // the same name should already be marked as all being in a single - // chunk. In that case this will overwrite the same value below which - // is fine. - for _, declared := range part.DeclaredSymbols { - if declared.IsTopLevel { - c.graph.Symbols.Get(declared.Ref).ChunkIndex = ast.MakeIndex32(uint32(chunkIndex)) - } - } - - // Record each symbol used in this part. This will later be matched up - // with our map of which chunk a given symbol is declared in to - // determine if the symbol needs to be imported from another chunk. - for ref := range part.SymbolUses { - symbol := c.graph.Symbols.Get(ref) - - // Ignore unbound symbols, which don't have declarations - if symbol.Kind == js_ast.SymbolUnbound { - continue - } - - // Ignore symbols that are going to be replaced by undefined - if symbol.ImportItemStatus == js_ast.ImportItemMissing { - continue - } - - // If this is imported from another file, follow the import - // reference and reference the symbol in that file instead - if importData, ok := repr.Meta.ImportsToBind[ref]; ok { - ref = importData.Ref - symbol = c.graph.Symbols.Get(ref) - } else if repr.Meta.Wrap == graph.WrapCJS && ref != repr.AST.WrapperRef { - // The only internal symbol that wrapped CommonJS files export - // is the wrapper itself. - continue - } - - // If this is an ES6 import from a CommonJS file, it will become a - // property access off the namespace symbol instead of a bare - // identifier. In that case we want to pull in the namespace symbol - // instead. The namespace symbol stores the result of "require()". - if symbol.NamespaceAlias != nil { - ref = symbol.NamespaceAlias.NamespaceRef - } - - // We must record this relationship even for symbols that are not - // imports. Due to code splitting, the definition of a symbol may - // be moved to a separate chunk than the use of a symbol even if - // the definition and use of that symbol are originally from the - // same source file. - imports[ref] = true - } - } - } - } - - // Include the exports if this is an entry point chunk - if chunk.isEntryPoint { - if repr, ok := c.graph.Files[chunk.sourceIndex].InputFile.Repr.(*graph.JSRepr); ok { - if repr.Meta.Wrap != graph.WrapCJS { - for _, alias := range repr.Meta.SortedAndFilteredExportAliases { - export := repr.Meta.ResolvedExports[alias] - targetRef := export.Ref - - // If this is an import, then target what the import points to - if importData, ok := c.graph.Files[export.SourceIndex].InputFile.Repr.(*graph.JSRepr).Meta.ImportsToBind[targetRef]; ok { - targetRef = importData.Ref - } - - // If this is an ES6 import from a CommonJS file, it will become a - // property access off the namespace symbol instead of a bare - // identifier. In that case we want to pull in the namespace symbol - // instead. The namespace symbol stores the result of "require()". - if symbol := c.graph.Symbols.Get(targetRef); symbol.NamespaceAlias != nil { - targetRef = symbol.NamespaceAlias.NamespaceRef - } - - imports[targetRef] = true - } - } - - // Ensure "exports" is included if the current output format needs it - if repr.Meta.ForceIncludeExportsForEntryPoint { - imports[repr.AST.ExportsRef] = true - } - - // Include the wrapper if present - if repr.Meta.Wrap != graph.WrapNone { - imports[repr.AST.WrapperRef] = true - } - } - } - - waitGroup.Done() - }(chunkIndex, chunk) - } - waitGroup.Wait() - - // Mark imported symbols as exported in the chunk from which they are declared - for chunkIndex := range chunks { - chunk := &chunks[chunkIndex] - chunkRepr, ok := chunk.chunkRepr.(*chunkReprJS) - if !ok { - continue - } - chunkMeta := chunkMetas[chunkIndex] - - // Find all uses in this chunk of symbols from other chunks - chunkRepr.importsFromOtherChunks = make(map[uint32]crossChunkImportItemArray) - for importRef := range chunkMeta.imports { - // Ignore uses that aren't top-level symbols - if otherChunkIndex := c.graph.Symbols.Get(importRef).ChunkIndex; otherChunkIndex.IsValid() { - if otherChunkIndex := otherChunkIndex.GetIndex(); otherChunkIndex != uint32(chunkIndex) { - chunkRepr.importsFromOtherChunks[otherChunkIndex] = - append(chunkRepr.importsFromOtherChunks[otherChunkIndex], crossChunkImportItem{ref: importRef}) - chunkMetas[otherChunkIndex].exports[importRef] = true - } - } - } - - // If this is an entry point, make sure we import all chunks belonging to - // this entry point, even if there are no imports. We need to make sure - // these chunks are evaluated for their side effects too. - if chunk.isEntryPoint { - for otherChunkIndex, otherChunk := range chunks { - if _, ok := otherChunk.chunkRepr.(*chunkReprJS); ok && chunkIndex != otherChunkIndex && otherChunk.entryBits.HasBit(chunk.entryPointBit) { - imports := chunkRepr.importsFromOtherChunks[uint32(otherChunkIndex)] - chunkRepr.importsFromOtherChunks[uint32(otherChunkIndex)] = imports - } - } - } - - // Make sure we also track dynamic cross-chunk imports. These need to be - // tracked so we count them as dependencies of this chunk for the purpose - // of hash calculation. - if chunkMeta.dynamicImports != nil { - sortedDynamicImports := make([]int, 0, len(chunkMeta.dynamicImports)) - for chunkIndex := range chunkMeta.dynamicImports { - sortedDynamicImports = append(sortedDynamicImports, chunkIndex) - } - sort.Ints(sortedDynamicImports) - for _, chunkIndex := range sortedDynamicImports { - chunk.crossChunkImports = append(chunk.crossChunkImports, chunkImport{ - importKind: ast.ImportDynamic, - chunkIndex: uint32(chunkIndex), - }) - } - } - } - - // Generate cross-chunk exports. These must be computed before cross-chunk - // imports because of export alias renaming, which must consider all export - // aliases simultaneously to avoid collisions. - for chunkIndex := range chunks { - chunk := &chunks[chunkIndex] - chunkRepr, ok := chunk.chunkRepr.(*chunkReprJS) - if !ok { - continue - } - - chunkRepr.exportsToOtherChunks = make(map[js_ast.Ref]string) - switch c.options.OutputFormat { - case config.FormatESModule: - r := renamer.ExportRenamer{} - var items []js_ast.ClauseItem - for _, export := range c.sortedCrossChunkExportItems(chunkMetas[chunkIndex].exports) { - var alias string - if c.options.MinifyIdentifiers { - alias = r.NextMinifiedName() - } else { - alias = r.NextRenamedName(c.graph.Symbols.Get(export.Ref).OriginalName) - } - items = append(items, js_ast.ClauseItem{Name: js_ast.LocRef{Ref: export.Ref}, Alias: alias}) - chunkRepr.exportsToOtherChunks[export.Ref] = alias - } - if len(items) > 0 { - chunkRepr.crossChunkSuffixStmts = []js_ast.Stmt{{Data: &js_ast.SExportClause{ - Items: items, - }}} - } - - default: - panic("Internal error") - } - } - - // Generate cross-chunk imports. These must be computed after cross-chunk - // exports because the export aliases must already be finalized so they can - // be embedded in the generated import statements. - for chunkIndex := range chunks { - chunk := &chunks[chunkIndex] - chunkRepr, ok := chunk.chunkRepr.(*chunkReprJS) - if !ok { - continue - } - - var crossChunkPrefixStmts []js_ast.Stmt - - for _, crossChunkImport := range c.sortedCrossChunkImports(chunks, chunkRepr.importsFromOtherChunks) { - switch c.options.OutputFormat { - case config.FormatESModule: - var items []js_ast.ClauseItem - for _, item := range crossChunkImport.sortedImportItems { - items = append(items, js_ast.ClauseItem{Name: js_ast.LocRef{Ref: item.ref}, Alias: item.exportAlias}) - } - importRecordIndex := uint32(len(chunk.crossChunkImports)) - chunk.crossChunkImports = append(chunk.crossChunkImports, chunkImport{ - importKind: ast.ImportStmt, - chunkIndex: crossChunkImport.chunkIndex, - }) - if len(items) > 0 { - // "import {a, b} from './chunk.js'" - crossChunkPrefixStmts = append(crossChunkPrefixStmts, js_ast.Stmt{Data: &js_ast.SImport{ - Items: &items, - ImportRecordIndex: importRecordIndex, - }}) - } else { - // "import './chunk.js'" - crossChunkPrefixStmts = append(crossChunkPrefixStmts, js_ast.Stmt{Data: &js_ast.SImport{ - ImportRecordIndex: importRecordIndex, - }}) - } - - default: - panic("Internal error") - } - } - - chunkRepr.crossChunkPrefixStmts = crossChunkPrefixStmts - } -} - -type crossChunkImport struct { - chunkIndex uint32 - sortedImportItems crossChunkImportItemArray -} - -// This type is just so we can use Go's native sort function -type crossChunkImportArray []crossChunkImport - -func (a crossChunkImportArray) Len() int { return len(a) } -func (a crossChunkImportArray) Swap(i int, j int) { a[i], a[j] = a[j], a[i] } - -func (a crossChunkImportArray) Less(i int, j int) bool { - return a[i].chunkIndex < a[j].chunkIndex -} - -// Sort cross-chunk imports by chunk name for determinism -func (c *linkerContext) sortedCrossChunkImports(chunks []chunkInfo, importsFromOtherChunks map[uint32]crossChunkImportItemArray) crossChunkImportArray { - result := make(crossChunkImportArray, 0, len(importsFromOtherChunks)) - - for otherChunkIndex, importItems := range importsFromOtherChunks { - // Sort imports from a single chunk by alias for determinism - otherChunk := &chunks[otherChunkIndex] - exportsToOtherChunks := otherChunk.chunkRepr.(*chunkReprJS).exportsToOtherChunks - for i, item := range importItems { - importItems[i].exportAlias = exportsToOtherChunks[item.ref] - } - sort.Sort(importItems) - result = append(result, crossChunkImport{ - chunkIndex: otherChunkIndex, - sortedImportItems: importItems, - }) - } - - sort.Sort(result) - return result -} - -type crossChunkImportItem struct { - ref js_ast.Ref - exportAlias string -} - -// This type is just so we can use Go's native sort function -type crossChunkImportItemArray []crossChunkImportItem - -func (a crossChunkImportItemArray) Len() int { return len(a) } -func (a crossChunkImportItemArray) Swap(i int, j int) { a[i], a[j] = a[j], a[i] } - -func (a crossChunkImportItemArray) Less(i int, j int) bool { - return a[i].exportAlias < a[j].exportAlias -} - -// The sort order here is arbitrary but needs to be consistent between builds. -// The InnerIndex should be stable because the parser for a single file is -// single-threaded and deterministically assigns out InnerIndex values -// sequentially. But the SourceIndex should be unstable because the main thread -// assigns out source index values sequentially to newly-discovered dependencies -// in a multi-threaded producer/consumer relationship. So instead we use the -// index of the source in the DFS order over all entry points for stability. -type stableRef struct { - StableSourceIndex uint32 - Ref js_ast.Ref -} - -// This type is just so we can use Go's native sort function -type stableRefArray []stableRef - -func (a stableRefArray) Len() int { return len(a) } -func (a stableRefArray) Swap(i int, j int) { a[i], a[j] = a[j], a[i] } -func (a stableRefArray) Less(i int, j int) bool { - ai, aj := a[i], a[j] - return ai.StableSourceIndex < aj.StableSourceIndex || - (ai.StableSourceIndex == aj.StableSourceIndex && ai.Ref.InnerIndex < aj.Ref.InnerIndex) -} - -// Sort cross-chunk exports by chunk name for determinism -func (c *linkerContext) sortedCrossChunkExportItems(exportRefs map[js_ast.Ref]bool) stableRefArray { - result := make(stableRefArray, 0, len(exportRefs)) - for ref := range exportRefs { - result = append(result, stableRef{ - StableSourceIndex: c.graph.StableSourceIndices[ref.SourceIndex], - Ref: ref, - }) - } - sort.Sort(result) - return result -} - -func (c *linkerContext) scanImportsAndExports() { - c.timer.Begin("Scan imports and exports") - defer c.timer.End("Scan imports and exports") - - // Step 1: Figure out what modules must be CommonJS - c.timer.Begin("Step 1") - for _, sourceIndex := range c.graph.ReachableFiles { - file := &c.graph.Files[sourceIndex] - switch repr := file.InputFile.Repr.(type) { - case *graph.CSSRepr: - // Inline URLs for non-CSS files into the CSS file - var additionalFiles []graph.OutputFile - for importRecordIndex := range repr.AST.ImportRecords { - if record := &repr.AST.ImportRecords[importRecordIndex]; record.SourceIndex.IsValid() { - otherFile := &c.graph.Files[record.SourceIndex.GetIndex()] - if otherRepr, ok := otherFile.InputFile.Repr.(*graph.JSRepr); ok { - record.Path.Text = otherRepr.AST.URLForCSS - record.Path.Namespace = "" - record.SourceIndex = ast.Index32{} - - // Copy the additional files to the output directory - additionalFiles = append(additionalFiles, otherFile.InputFile.AdditionalFiles...) - } - } - } - file.InputFile.AdditionalFiles = additionalFiles - - case *graph.JSRepr: - for importRecordIndex := range repr.AST.ImportRecords { - record := &repr.AST.ImportRecords[importRecordIndex] - if !record.SourceIndex.IsValid() { - continue - } - - otherFile := &c.graph.Files[record.SourceIndex.GetIndex()] - otherRepr := otherFile.InputFile.Repr.(*graph.JSRepr) - - switch record.Kind { - case ast.ImportStmt: - // Importing using ES6 syntax from a file without any ES6 syntax - // causes that module to be considered CommonJS-style, even if it - // doesn't have any CommonJS exports. - // - // That means the ES6 imports will become undefined instead of - // causing errors. This is for compatibility with older CommonJS- - // style bundlers. - // - // We emit a warning in this case but try to avoid turning the module - // into a CommonJS module if possible. This is possible with named - // imports (the module stays an ECMAScript module but the imports are - // rewritten with undefined) but is not possible with star or default - // imports: - // - // import * as ns from './empty-file' - // import defVal from './empty-file' - // console.log(ns, defVal) - // - // In that case the module *is* considered a CommonJS module because - // the namespace object must be created. - if (record.ContainsImportStar || record.ContainsDefaultAlias) && otherRepr.AST.ExportsKind == js_ast.ExportsNone && !otherRepr.AST.HasLazyExport { - otherRepr.Meta.Wrap = graph.WrapCJS - otherRepr.AST.ExportsKind = js_ast.ExportsCommonJS - } - - case ast.ImportRequire: - // Files that are imported with require() must be CommonJS modules - if otherRepr.AST.ExportsKind == js_ast.ExportsESM { - otherRepr.Meta.Wrap = graph.WrapESM - } else { - otherRepr.Meta.Wrap = graph.WrapCJS - otherRepr.AST.ExportsKind = js_ast.ExportsCommonJS - } - - case ast.ImportDynamic: - if !c.options.CodeSplitting { - // If we're not splitting, then import() is just a require() that - // returns a promise, so the imported file must be a CommonJS module - if otherRepr.AST.ExportsKind == js_ast.ExportsESM { - otherRepr.Meta.Wrap = graph.WrapESM - } else { - otherRepr.Meta.Wrap = graph.WrapCJS - otherRepr.AST.ExportsKind = js_ast.ExportsCommonJS - } - } - } - } - - // If the output format doesn't have an implicit CommonJS wrapper, any file - // that uses CommonJS features will need to be wrapped, even though the - // resulting wrapper won't be invoked by other files. An exception is made - // for entry point files in CommonJS format (or when in pass-through mode). - if repr.AST.ExportsKind == js_ast.ExportsCommonJS && (!file.IsEntryPoint() || - c.options.OutputFormat == config.FormatIIFE || c.options.OutputFormat == config.FormatESModule) { - repr.Meta.Wrap = graph.WrapCJS - } - } - } - c.timer.End("Step 1") - - // Step 2: Propagate dynamic export status for export star statements that - // are re-exports from a module whose exports are not statically analyzable. - // In this case the export star must be evaluated at run time instead of at - // bundle time. - c.timer.Begin("Step 2") - for _, sourceIndex := range c.graph.ReachableFiles { - repr, ok := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - if !ok { - continue - } - - if repr.Meta.Wrap != graph.WrapNone { - c.recursivelyWrapDependencies(sourceIndex) - } - - if len(repr.AST.ExportStarImportRecords) > 0 { - visited := make(map[uint32]bool) - c.hasDynamicExportsDueToExportStar(sourceIndex, visited) - } - - // Even if the output file is CommonJS-like, we may still need to wrap - // CommonJS-style files. Any file that imports a CommonJS-style file will - // cause that file to need to be wrapped. This is because the import - // method, whatever it is, will need to invoke the wrapper. Note that - // this can include entry points (e.g. an entry point that imports a file - // that imports that entry point). - for _, record := range repr.AST.ImportRecords { - if record.SourceIndex.IsValid() { - otherRepr := c.graph.Files[record.SourceIndex.GetIndex()].InputFile.Repr.(*graph.JSRepr) - if otherRepr.AST.ExportsKind == js_ast.ExportsCommonJS { - c.recursivelyWrapDependencies(record.SourceIndex.GetIndex()) - } - } - } - } - c.timer.End("Step 2") - - // Step 3: Resolve "export * from" statements. This must be done after we - // discover all modules that can have dynamic exports because export stars - // are ignored for those modules. - c.timer.Begin("Step 3") - exportStarStack := make([]uint32, 0, 32) - for _, sourceIndex := range c.graph.ReachableFiles { - repr, ok := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - if !ok { - continue - } - - // Expression-style loaders defer code generation until linking. Code - // generation is done here because at this point we know that the - // "ExportsKind" field has its final value and will not be changed. - if repr.AST.HasLazyExport { - c.generateCodeForLazyExport(sourceIndex) - } - - // Propagate exports for export star statements - if len(repr.AST.ExportStarImportRecords) > 0 { - c.addExportsForExportStar(repr.Meta.ResolvedExports, sourceIndex, exportStarStack) - } - - // Also add a special export so import stars can bind to it. This must be - // done in this step because it must come after CommonJS module discovery - // but before matching imports with exports. - repr.Meta.ResolvedExportStar = &graph.ExportData{ - Ref: repr.AST.ExportsRef, - SourceIndex: sourceIndex, - } - } - c.timer.End("Step 3") - - // Step 4: Match imports with exports. This must be done after we process all - // export stars because imports can bind to export star re-exports. - c.timer.Begin("Step 4") - for _, sourceIndex := range c.graph.ReachableFiles { - file := &c.graph.Files[sourceIndex] - repr, ok := file.InputFile.Repr.(*graph.JSRepr) - if !ok { - continue - } - - if len(repr.AST.NamedImports) > 0 { - c.matchImportsWithExportsForFile(uint32(sourceIndex)) - } - - // If we're exporting as CommonJS and this file was originally CommonJS, - // then we'll be using the actual CommonJS "exports" and/or "module" - // symbols. In that case make sure to mark them as such so they don't - // get minified. - if file.IsEntryPoint() && repr.AST.ExportsKind == js_ast.ExportsCommonJS && repr.Meta.Wrap == graph.WrapNone && - (c.options.OutputFormat == config.FormatPreserve || c.options.OutputFormat == config.FormatCommonJS) { - exportsRef := js_ast.FollowSymbols(c.graph.Symbols, repr.AST.ExportsRef) - moduleRef := js_ast.FollowSymbols(c.graph.Symbols, repr.AST.ModuleRef) - c.graph.Symbols.Get(exportsRef).Kind = js_ast.SymbolUnbound - c.graph.Symbols.Get(moduleRef).Kind = js_ast.SymbolUnbound - } else if repr.Meta.ForceIncludeExportsForEntryPoint || repr.AST.ExportsKind != js_ast.ExportsCommonJS { - repr.Meta.NeedsExportsVariable = true - } - - // Create the wrapper part for wrapped files. This is needed by a later step. - c.createWrapperForFile(uint32(sourceIndex)) - } - c.timer.End("Step 4") - - // Step 5: Create namespace exports for every file. This is always necessary - // for CommonJS files, and is also necessary for other files if they are - // imported using an import star statement. - c.timer.Begin("Step 5") - waitGroup := sync.WaitGroup{} - for _, sourceIndex := range c.graph.ReachableFiles { - repr, ok := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - if !ok { - continue - } - - // This is the slowest step and is also parallelizable, so do this in parallel. - waitGroup.Add(1) - go func(sourceIndex uint32, repr *graph.JSRepr) { - // Now that all exports have been resolved, sort and filter them to create - // something we can iterate over later. - aliases := make([]string, 0, len(repr.Meta.ResolvedExports)) - nextAlias: - for alias, export := range repr.Meta.ResolvedExports { - // Re-exporting multiple symbols with the same name causes an ambiguous - // export. These names cannot be used and should not end up in generated code. - otherRepr := c.graph.Files[export.SourceIndex].InputFile.Repr.(*graph.JSRepr) - if len(export.PotentiallyAmbiguousExportStarRefs) > 0 { - mainRef := export.Ref - if imported, ok := otherRepr.Meta.ImportsToBind[export.Ref]; ok { - mainRef = imported.Ref - } - for _, ambiguousExport := range export.PotentiallyAmbiguousExportStarRefs { - ambiguousRepr := c.graph.Files[ambiguousExport.SourceIndex].InputFile.Repr.(*graph.JSRepr) - ambiguousRef := ambiguousExport.Ref - if imported, ok := ambiguousRepr.Meta.ImportsToBind[ambiguousExport.Ref]; ok { - ambiguousRef = imported.Ref - } - if mainRef != ambiguousRef { - continue nextAlias - } - } - } - - // Ignore re-exported imports in TypeScript files that failed to be - // resolved. These are probably just type-only imports so the best thing to - // do is to silently omit them from the export list. - if otherRepr.Meta.IsProbablyTypeScriptType[export.Ref] { - continue - } - - aliases = append(aliases, alias) - } - sort.Strings(aliases) - repr.Meta.SortedAndFilteredExportAliases = aliases - - // Export creation uses "sortedAndFilteredExportAliases" so this must - // come second after we fill in that array - c.createExportsForFile(uint32(sourceIndex)) - - waitGroup.Done() - }(sourceIndex, repr) - } - waitGroup.Wait() - c.timer.End("Step 5") - - // Step 6: Bind imports to exports. This adds non-local dependencies on the - // parts that declare the export to all parts that use the import. Also - // generate wrapper parts for wrapped files. - c.timer.Begin("Step 6") - for _, sourceIndex := range c.graph.ReachableFiles { - file := &c.graph.Files[sourceIndex] - repr, ok := file.InputFile.Repr.(*graph.JSRepr) - if !ok { - continue - } - - // Pre-generate symbols for re-exports CommonJS symbols in case they - // are necessary later. This is done now because the symbols map cannot be - // mutated later due to parallelism. - if file.IsEntryPoint() && c.options.OutputFormat == config.FormatESModule { - copies := make([]js_ast.Ref, len(repr.Meta.SortedAndFilteredExportAliases)) - for i, alias := range repr.Meta.SortedAndFilteredExportAliases { - copies[i] = c.graph.GenerateNewSymbol(sourceIndex, js_ast.SymbolOther, "export_"+alias) - } - repr.Meta.CJSExportCopies = copies - } - - // Use "init_*" for ESM wrappers instead of "require_*" - if repr.Meta.Wrap == graph.WrapESM { - c.graph.Symbols.Get(repr.AST.WrapperRef).OriginalName = "init_" + file.InputFile.Source.IdentifierName - } - - // If this isn't CommonJS, then rename the unused "exports" and "module" - // variables to avoid them causing the identically-named variables in - // actual CommonJS files from being renamed. This is purely about - // aesthetics and is not about correctness. This is done here because by - // this point, we know the CommonJS status will not change further. - if repr.Meta.Wrap != graph.WrapCJS && repr.AST.ExportsKind != js_ast.ExportsCommonJS { - name := file.InputFile.Source.IdentifierName - c.graph.Symbols.Get(repr.AST.ExportsRef).OriginalName = name + "_exports" - c.graph.Symbols.Get(repr.AST.ModuleRef).OriginalName = name + "_module" - } - - // Include the "__export" symbol from the runtime if it was used in the - // previous step. The previous step can't do this because it's running in - // parallel and can't safely mutate the "importsToBind" map of another file. - if repr.Meta.NeedsExportSymbolFromRuntime { - runtimeRepr := c.graph.Files[runtime.SourceIndex].InputFile.Repr.(*graph.JSRepr) - exportRef := runtimeRepr.AST.ModuleScope.Members["__export"].Ref - c.graph.GenerateSymbolImportAndUse(sourceIndex, js_ast.NSExportPartIndex, exportRef, 1, runtime.SourceIndex) - } - - for importRef, importData := range repr.Meta.ImportsToBind { - resolvedRepr := c.graph.Files[importData.SourceIndex].InputFile.Repr.(*graph.JSRepr) - partsDeclaringSymbol := resolvedRepr.TopLevelSymbolToParts(importData.Ref) - - for _, partIndex := range repr.AST.NamedImports[importRef].LocalPartsWithUses { - part := &repr.AST.Parts[partIndex] - - // Depend on the file containing the imported symbol - for _, resolvedPartIndex := range partsDeclaringSymbol { - part.Dependencies = append(part.Dependencies, js_ast.Dependency{ - SourceIndex: importData.SourceIndex, - PartIndex: resolvedPartIndex, - }) - } - - // Also depend on any files that re-exported this symbol in between the - // file containing the import and the file containing the imported symbol - part.Dependencies = append(part.Dependencies, importData.ReExports...) - } - - // Merge these symbols so they will share the same name - js_ast.MergeSymbols(c.graph.Symbols, importRef, importData.Ref) - } - - // If this is an entry point, depend on all exports so they are included - if file.IsEntryPoint() { - var dependencies []js_ast.Dependency - - for _, alias := range repr.Meta.SortedAndFilteredExportAliases { - export := repr.Meta.ResolvedExports[alias] - targetSourceIndex := export.SourceIndex - targetRef := export.Ref - - // If this is an import, then target what the import points to - targetRepr := c.graph.Files[targetSourceIndex].InputFile.Repr.(*graph.JSRepr) - if importData, ok := targetRepr.Meta.ImportsToBind[targetRef]; ok { - targetSourceIndex = importData.SourceIndex - targetRef = importData.Ref - targetRepr = c.graph.Files[targetSourceIndex].InputFile.Repr.(*graph.JSRepr) - dependencies = append(dependencies, importData.ReExports...) - } - - // Pull in all declarations of this symbol - for _, partIndex := range targetRepr.TopLevelSymbolToParts(targetRef) { - dependencies = append(dependencies, js_ast.Dependency{ - SourceIndex: targetSourceIndex, - PartIndex: partIndex, - }) - } - } - - // Ensure "exports" is included if the current output format needs it - if repr.Meta.ForceIncludeExportsForEntryPoint { - dependencies = append(dependencies, js_ast.Dependency{ - SourceIndex: sourceIndex, - PartIndex: js_ast.NSExportPartIndex, - }) - } - - // Include the wrapper if present - if repr.Meta.Wrap != graph.WrapNone { - dependencies = append(dependencies, js_ast.Dependency{ - SourceIndex: sourceIndex, - PartIndex: repr.Meta.WrapperPartIndex.GetIndex(), - }) - } - - // Represent these constraints with a dummy part - entryPointPartIndex := c.graph.AddPartToFile(sourceIndex, js_ast.Part{ - Dependencies: dependencies, - CanBeRemovedIfUnused: false, - }) - repr.Meta.EntryPointPartIndex = ast.MakeIndex32(entryPointPartIndex) - - // Pull in the "__toCommonJS" symbol if we need it due to being an entry point - if repr.Meta.ForceIncludeExportsForEntryPoint { - c.graph.GenerateRuntimeSymbolImportAndUse(sourceIndex, entryPointPartIndex, "__toCommonJS", 1) - } - } - - // Encode import-specific constraints in the dependency graph - for partIndex, part := range repr.AST.Parts { - toESMUses := uint32(0) - toCommonJSUses := uint32(0) - runtimeRequireUses := uint32(0) - - // Imports of wrapped files must depend on the wrapper - for _, importRecordIndex := range part.ImportRecordIndices { - record := &repr.AST.ImportRecords[importRecordIndex] - - // Don't follow external imports (this includes import() expressions) - if !record.SourceIndex.IsValid() || c.isExternalDynamicImport(record, sourceIndex) { - // This is an external import. Check if it will be a "require()" call. - if record.Kind == ast.ImportRequire || !c.options.OutputFormat.KeepES6ImportExportSyntax() || - (record.Kind == ast.ImportDynamic && c.options.UnsupportedJSFeatures.Has(compat.DynamicImport)) { - // We should use "__require" instead of "require" if we're not - // generating a CommonJS output file, since it won't exist otherwise - if config.ShouldCallRuntimeRequire(c.options.Mode, c.options.OutputFormat) { - record.CallRuntimeRequire = true - runtimeRequireUses++ - } - - // It needs the "__toESM" wrapper if it wasn't originally a - // CommonJS import (i.e. it wasn't a "require()" call). - if record.Kind != ast.ImportRequire { - record.WrapWithToESM = true - toESMUses++ - } - } - continue - } - - otherSourceIndex := record.SourceIndex.GetIndex() - otherRepr := c.graph.Files[otherSourceIndex].InputFile.Repr.(*graph.JSRepr) - - if otherRepr.Meta.Wrap != graph.WrapNone { - // Depend on the automatically-generated require wrapper symbol - wrapperRef := otherRepr.AST.WrapperRef - c.graph.GenerateSymbolImportAndUse(sourceIndex, uint32(partIndex), wrapperRef, 1, otherSourceIndex) - - // This is an ES6 import of a CommonJS module, so it needs the - // "__toESM" wrapper as long as it's not a bare "require()" - if record.Kind != ast.ImportRequire && otherRepr.AST.ExportsKind == js_ast.ExportsCommonJS { - record.WrapWithToESM = true - toESMUses++ - } - - // If this is an ESM wrapper, also depend on the exports object - // since the final code will contain an inline reference to it. - // This must be done for "require()" and "import()" expressions - // but does not need to be done for "import" statements since - // those just cause us to reference the exports directly. - if otherRepr.Meta.Wrap == graph.WrapESM && record.Kind != ast.ImportStmt { - c.graph.GenerateSymbolImportAndUse(sourceIndex, uint32(partIndex), otherRepr.AST.ExportsRef, 1, otherSourceIndex) - - // If this is a "require()" call, then we should add the - // "__esModule" marker to behave as if the module was converted - // from ESM to CommonJS. This is done via a wrapper instead of - // by modifying the exports object itself because the same ES - // module may be simultaneously imported and required, and the - // importing code should not see "__esModule" while the requiring - // code should see "__esModule". This is an extremely complex - // and subtle set of bundler interop issues. See for example - // https://github.com/evanw/esbuild/issues/1591. - if record.Kind == ast.ImportRequire { - record.WrapWithToCJS = true - toCommonJSUses++ - } - } - } else if record.Kind == ast.ImportStmt && otherRepr.AST.ExportsKind == js_ast.ExportsESMWithDynamicFallback { - // This is an import of a module that has a dynamic export fallback - // object. In that case we need to depend on that object in case - // something ends up needing to use it later. This could potentially - // be omitted in some cases with more advanced analysis if this - // dynamic export fallback object doesn't end up being needed. - c.graph.GenerateSymbolImportAndUse(sourceIndex, uint32(partIndex), otherRepr.AST.ExportsRef, 1, otherSourceIndex) - } - } - - // If there's an ES6 import of a non-ES6 module, then we're going to need the - // "__toESM" symbol from the runtime to wrap the result of "require()" - c.graph.GenerateRuntimeSymbolImportAndUse(sourceIndex, uint32(partIndex), "__toESM", toESMUses) - - // If there's a CommonJS require of an ES6 module, then we're going to need the - // "__toCommonJS" symbol from the runtime to wrap the exports object - c.graph.GenerateRuntimeSymbolImportAndUse(sourceIndex, uint32(partIndex), "__toCommonJS", toCommonJSUses) - - // If there are unbundled calls to "require()" and we're not generating - // code for node, then substitute a "__require" wrapper for "require". - c.graph.GenerateRuntimeSymbolImportAndUse(sourceIndex, uint32(partIndex), "__require", runtimeRequireUses) - - // If there's an ES6 export star statement of a non-ES6 module, then we're - // going to need the "__reExport" symbol from the runtime - reExportUses := uint32(0) - for _, importRecordIndex := range repr.AST.ExportStarImportRecords { - record := &repr.AST.ImportRecords[importRecordIndex] - - // Is this export star evaluated at run time? - happensAtRunTime := !record.SourceIndex.IsValid() && (!file.IsEntryPoint() || !c.options.OutputFormat.KeepES6ImportExportSyntax()) - if record.SourceIndex.IsValid() { - otherSourceIndex := record.SourceIndex.GetIndex() - otherRepr := c.graph.Files[otherSourceIndex].InputFile.Repr.(*graph.JSRepr) - if otherSourceIndex != sourceIndex && otherRepr.AST.ExportsKind.IsDynamic() { - happensAtRunTime = true - } - if otherRepr.AST.ExportsKind == js_ast.ExportsESMWithDynamicFallback { - // This looks like "__reExport(exports_a, exports_b)". Make sure to - // pull in the "exports_b" symbol into this export star. This matters - // in code splitting situations where the "export_b" symbol might live - // in a different chunk than this export star. - c.graph.GenerateSymbolImportAndUse(sourceIndex, uint32(partIndex), otherRepr.AST.ExportsRef, 1, otherSourceIndex) - } - } - if happensAtRunTime { - // Depend on this file's "exports" object for the first argument to "__reExport" - c.graph.GenerateSymbolImportAndUse(sourceIndex, uint32(partIndex), repr.AST.ExportsRef, 1, sourceIndex) - record.CallsRunTimeReExportFn = true - repr.AST.UsesExportsRef = true - reExportUses++ - } - } - c.graph.GenerateRuntimeSymbolImportAndUse(sourceIndex, uint32(partIndex), "__reExport", reExportUses) - } - } - c.timer.End("Step 6") -} - -func (c *linkerContext) generateCodeForLazyExport(sourceIndex uint32) { - file := &c.graph.Files[sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - - // Grab the lazy expression - if len(repr.AST.Parts) < 1 { - panic("Internal error") - } - part := &repr.AST.Parts[1] - if len(part.Stmts) != 1 { - panic("Internal error") - } - lazy, ok := part.Stmts[0].Data.(*js_ast.SLazyExport) - if !ok { - panic("Internal error") - } - - // Use "module.exports = value" for CommonJS-style modules - if repr.AST.ExportsKind == js_ast.ExportsCommonJS { - part.Stmts = []js_ast.Stmt{js_ast.AssignStmt( - js_ast.Expr{Loc: lazy.Value.Loc, Data: &js_ast.EDot{ - Target: js_ast.Expr{Loc: lazy.Value.Loc, Data: &js_ast.EIdentifier{Ref: repr.AST.ModuleRef}}, - Name: "exports", - NameLoc: lazy.Value.Loc, - }}, - lazy.Value, - )} - c.graph.GenerateSymbolImportAndUse(sourceIndex, 0, repr.AST.ModuleRef, 1, sourceIndex) - return - } - - // Otherwise, generate ES6 export statements. These are added as additional - // parts so they can be tree shaken individually. - part.Stmts = nil - - type prevExport struct { - ref js_ast.Ref - partIndex uint32 - } - - generateExport := func(name string, alias string, value js_ast.Expr) prevExport { - // Generate a new symbol - ref := c.graph.GenerateNewSymbol(sourceIndex, js_ast.SymbolOther, name) - - // Generate an ES6 export - var stmt js_ast.Stmt - if alias == "default" { - stmt = js_ast.Stmt{Loc: value.Loc, Data: &js_ast.SExportDefault{ - DefaultName: js_ast.LocRef{Loc: value.Loc, Ref: ref}, - Value: js_ast.Stmt{Loc: value.Loc, Data: &js_ast.SExpr{Value: value}}, - }} - } else { - stmt = js_ast.Stmt{Loc: value.Loc, Data: &js_ast.SLocal{ - IsExport: true, - Decls: []js_ast.Decl{{ - Binding: js_ast.Binding{Loc: value.Loc, Data: &js_ast.BIdentifier{Ref: ref}}, - ValueOrNil: value, - }}, - }} - } - - // Link the export into the graph for tree shaking - partIndex := c.graph.AddPartToFile(sourceIndex, js_ast.Part{ - Stmts: []js_ast.Stmt{stmt}, - DeclaredSymbols: []js_ast.DeclaredSymbol{{Ref: ref, IsTopLevel: true}}, - CanBeRemovedIfUnused: true, - }) - c.graph.GenerateSymbolImportAndUse(sourceIndex, partIndex, repr.AST.ModuleRef, 1, sourceIndex) - repr.Meta.ResolvedExports[alias] = graph.ExportData{Ref: ref, SourceIndex: sourceIndex} - return prevExport{ref: ref, partIndex: partIndex} - } - - // Unwrap JSON objects into separate top-level variables - var prevExports []js_ast.Ref - jsonValue := lazy.Value - if object, ok := jsonValue.Data.(*js_ast.EObject); ok { - clone := *object - clone.Properties = append(make([]js_ast.Property, 0, len(clone.Properties)), clone.Properties...) - for i, property := range clone.Properties { - if str, ok := property.Key.Data.(*js_ast.EString); ok && - (!file.IsEntryPoint() || js_lexer.IsIdentifierUTF16(str.Value) || - !c.options.UnsupportedJSFeatures.Has(compat.ArbitraryModuleNamespaceNames)) { - name := js_lexer.UTF16ToString(str.Value) - exportRef := generateExport(name, name, property.ValueOrNil).ref - prevExports = append(prevExports, exportRef) - clone.Properties[i].ValueOrNil = js_ast.Expr{Loc: property.Key.Loc, Data: &js_ast.EIdentifier{Ref: exportRef}} - } - } - jsonValue.Data = &clone - } - - // Generate the default export - finalExportPartIndex := generateExport(file.InputFile.Source.IdentifierName+"_default", "default", jsonValue).partIndex - - // The default export depends on all of the previous exports - for _, exportRef := range prevExports { - c.graph.GenerateSymbolImportAndUse(sourceIndex, finalExportPartIndex, exportRef, 1, sourceIndex) - } -} - -func (c *linkerContext) createExportsForFile(sourceIndex uint32) { - //////////////////////////////////////////////////////////////////////////////// - // WARNING: This method is run in parallel over all files. Do not mutate data - // for other files within this method or you will create a data race. - //////////////////////////////////////////////////////////////////////////////// - - file := &c.graph.Files[sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - - // Generate a getter per export - properties := []js_ast.Property{} - nsExportDependencies := []js_ast.Dependency{} - nsExportSymbolUses := make(map[js_ast.Ref]js_ast.SymbolUse) - for _, alias := range repr.Meta.SortedAndFilteredExportAliases { - export := repr.Meta.ResolvedExports[alias] - - // If this is an export of an import, reference the symbol that the import - // was eventually resolved to. We need to do this because imports have - // already been resolved by this point, so we can't generate a new import - // and have that be resolved later. - if importData, ok := c.graph.Files[export.SourceIndex].InputFile.Repr.(*graph.JSRepr).Meta.ImportsToBind[export.Ref]; ok { - export.Ref = importData.Ref - export.SourceIndex = importData.SourceIndex - nsExportDependencies = append(nsExportDependencies, importData.ReExports...) - } - - // Exports of imports need EImportIdentifier in case they need to be re- - // written to a property access later on - var value js_ast.Expr - if c.graph.Symbols.Get(export.Ref).NamespaceAlias != nil { - value = js_ast.Expr{Data: &js_ast.EImportIdentifier{Ref: export.Ref}} - } else { - value = js_ast.Expr{Data: &js_ast.EIdentifier{Ref: export.Ref}} - } - - // Add a getter property - var getter js_ast.Expr - body := js_ast.FnBody{Stmts: []js_ast.Stmt{{Loc: value.Loc, Data: &js_ast.SReturn{ValueOrNil: value}}}} - if c.options.UnsupportedJSFeatures.Has(compat.Arrow) { - getter = js_ast.Expr{Data: &js_ast.EFunction{Fn: js_ast.Fn{Body: body}}} - } else { - getter = js_ast.Expr{Data: &js_ast.EArrow{PreferExpr: true, Body: body}} - } - properties = append(properties, js_ast.Property{ - Key: js_ast.Expr{Data: &js_ast.EString{Value: js_lexer.StringToUTF16(alias)}}, - ValueOrNil: getter, - }) - nsExportSymbolUses[export.Ref] = js_ast.SymbolUse{CountEstimate: 1} - - // Make sure the part that declares the export is included - for _, partIndex := range c.graph.Files[export.SourceIndex].InputFile.Repr.(*graph.JSRepr).TopLevelSymbolToParts(export.Ref) { - // Use a non-local dependency since this is likely from a different - // file if it came in through an export star - nsExportDependencies = append(nsExportDependencies, js_ast.Dependency{ - SourceIndex: export.SourceIndex, - PartIndex: partIndex, - }) - } - } - - declaredSymbols := []js_ast.DeclaredSymbol{} - var nsExportStmts []js_ast.Stmt - - // Prefix this part with "var exports = {}" if this isn't a CommonJS entry point - if repr.Meta.NeedsExportsVariable { - nsExportStmts = append(nsExportStmts, js_ast.Stmt{Data: &js_ast.SLocal{Decls: []js_ast.Decl{{ - Binding: js_ast.Binding{Data: &js_ast.BIdentifier{Ref: repr.AST.ExportsRef}}, - ValueOrNil: js_ast.Expr{Data: &js_ast.EObject{}}, - }}}}) - declaredSymbols = append(declaredSymbols, js_ast.DeclaredSymbol{ - Ref: repr.AST.ExportsRef, - IsTopLevel: true, - }) - } - - // "__export(exports, { foo: () => foo })" - exportRef := js_ast.InvalidRef - if len(properties) > 0 { - runtimeRepr := c.graph.Files[runtime.SourceIndex].InputFile.Repr.(*graph.JSRepr) - exportRef = runtimeRepr.AST.ModuleScope.Members["__export"].Ref - nsExportStmts = append(nsExportStmts, js_ast.Stmt{Data: &js_ast.SExpr{Value: js_ast.Expr{Data: &js_ast.ECall{ - Target: js_ast.Expr{Data: &js_ast.EIdentifier{Ref: exportRef}}, - Args: []js_ast.Expr{ - {Data: &js_ast.EIdentifier{Ref: repr.AST.ExportsRef}}, - {Data: &js_ast.EObject{ - Properties: properties, - }}, - }, - }}}}) - - // Make sure this file depends on the "__export" symbol - for _, partIndex := range runtimeRepr.TopLevelSymbolToParts(exportRef) { - nsExportDependencies = append(nsExportDependencies, js_ast.Dependency{ - SourceIndex: runtime.SourceIndex, - PartIndex: partIndex, - }) - } - - // Make sure the CommonJS closure, if there is one, includes "exports" - repr.AST.UsesExportsRef = true - } - - // No need to generate a part if it'll be empty - if len(nsExportStmts) > 0 { - // Initialize the part that was allocated for us earlier. The information - // here will be used after this during tree shaking. - repr.AST.Parts[js_ast.NSExportPartIndex] = js_ast.Part{ - Stmts: nsExportStmts, - SymbolUses: nsExportSymbolUses, - Dependencies: nsExportDependencies, - DeclaredSymbols: declaredSymbols, - - // This can be removed if nothing uses it - CanBeRemovedIfUnused: true, - - // Make sure this is trimmed if unused even if tree shaking is disabled - ForceTreeShaking: true, - } - - // Pull in the "__export" symbol if it was used - if exportRef != js_ast.InvalidRef { - repr.Meta.NeedsExportSymbolFromRuntime = true - } - } -} - -func (c *linkerContext) createWrapperForFile(sourceIndex uint32) { - repr := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - - switch repr.Meta.Wrap { - // If this is a CommonJS file, we're going to need to generate a wrapper - // for the CommonJS closure. That will end up looking something like this: - // - // var require_foo = __commonJS((exports, module) => { - // ... - // }); - // - // However, that generation is special-cased for various reasons and is - // done later on. Still, we're going to need to ensure that this file - // both depends on the "__commonJS" symbol and declares the "require_foo" - // symbol. Instead of special-casing this during the reachablity analysis - // below, we just append a dummy part to the end of the file with these - // dependencies and let the general-purpose reachablity analysis take care - // of it. - case graph.WrapCJS: - runtimeRepr := c.graph.Files[runtime.SourceIndex].InputFile.Repr.(*graph.JSRepr) - commonJSParts := runtimeRepr.TopLevelSymbolToParts(c.cjsRuntimeRef) - - // Generate the dummy part - dependencies := make([]js_ast.Dependency, len(commonJSParts)) - for i, partIndex := range commonJSParts { - dependencies[i] = js_ast.Dependency{ - SourceIndex: runtime.SourceIndex, - PartIndex: partIndex, - } - } - partIndex := c.graph.AddPartToFile(sourceIndex, js_ast.Part{ - SymbolUses: map[js_ast.Ref]js_ast.SymbolUse{ - repr.AST.WrapperRef: {CountEstimate: 1}, - }, - DeclaredSymbols: []js_ast.DeclaredSymbol{ - {Ref: repr.AST.ExportsRef, IsTopLevel: true}, - {Ref: repr.AST.ModuleRef, IsTopLevel: true}, - {Ref: repr.AST.WrapperRef, IsTopLevel: true}, - }, - Dependencies: dependencies, - }) - repr.Meta.WrapperPartIndex = ast.MakeIndex32(partIndex) - c.graph.GenerateSymbolImportAndUse(sourceIndex, partIndex, c.cjsRuntimeRef, 1, runtime.SourceIndex) - - // If this is a lazily-initialized ESM file, we're going to need to - // generate a wrapper for the ESM closure. That will end up looking - // something like this: - // - // var init_foo = __esm(() => { - // ... - // }); - // - // This depends on the "__esm" symbol and declares the "init_foo" symbol - // for similar reasons to the CommonJS closure above. - case graph.WrapESM: - runtimeRepr := c.graph.Files[runtime.SourceIndex].InputFile.Repr.(*graph.JSRepr) - esmParts := runtimeRepr.TopLevelSymbolToParts(c.esmRuntimeRef) - - // Generate the dummy part - dependencies := make([]js_ast.Dependency, len(esmParts)) - for i, partIndex := range esmParts { - dependencies[i] = js_ast.Dependency{ - SourceIndex: runtime.SourceIndex, - PartIndex: partIndex, - } - } - partIndex := c.graph.AddPartToFile(sourceIndex, js_ast.Part{ - SymbolUses: map[js_ast.Ref]js_ast.SymbolUse{ - repr.AST.WrapperRef: {CountEstimate: 1}, - }, - DeclaredSymbols: []js_ast.DeclaredSymbol{ - {Ref: repr.AST.WrapperRef, IsTopLevel: true}, - }, - Dependencies: dependencies, - }) - repr.Meta.WrapperPartIndex = ast.MakeIndex32(partIndex) - c.graph.GenerateSymbolImportAndUse(sourceIndex, partIndex, c.esmRuntimeRef, 1, runtime.SourceIndex) - } -} - -func (c *linkerContext) matchImportsWithExportsForFile(sourceIndex uint32) { - file := &c.graph.Files[sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - - // Sort imports for determinism. Otherwise our unit tests will randomly - // fail sometimes when error messages are reordered. - sortedImportRefs := make([]int, 0, len(repr.AST.NamedImports)) - for ref := range repr.AST.NamedImports { - sortedImportRefs = append(sortedImportRefs, int(ref.InnerIndex)) - } - sort.Ints(sortedImportRefs) - - // Pair imports with their matching exports - for _, innerIndex := range sortedImportRefs { - // Re-use memory for the cycle detector - c.cycleDetector = c.cycleDetector[:0] - - importRef := js_ast.Ref{SourceIndex: sourceIndex, InnerIndex: uint32(innerIndex)} - result, reExports := c.matchImportWithExport(importTracker{sourceIndex: sourceIndex, importRef: importRef}, nil) - switch result.kind { - case matchImportIgnore: - - case matchImportNormal: - repr.Meta.ImportsToBind[importRef] = graph.ImportData{ - ReExports: reExports, - SourceIndex: result.sourceIndex, - Ref: result.ref, - } - - case matchImportNamespace: - c.graph.Symbols.Get(importRef).NamespaceAlias = &js_ast.NamespaceAlias{ - NamespaceRef: result.namespaceRef, - Alias: result.alias, - } - - case matchImportNormalAndNamespace: - repr.Meta.ImportsToBind[importRef] = graph.ImportData{ - ReExports: reExports, - SourceIndex: result.sourceIndex, - Ref: result.ref, - } - - c.graph.Symbols.Get(importRef).NamespaceAlias = &js_ast.NamespaceAlias{ - NamespaceRef: result.namespaceRef, - Alias: result.alias, - } - - case matchImportCycle: - namedImport := repr.AST.NamedImports[importRef] - c.log.Add(logger.Error, file.LineColumnTracker(), js_lexer.RangeOfIdentifier(file.InputFile.Source, namedImport.AliasLoc), - fmt.Sprintf("Detected cycle while resolving import %q", namedImport.Alias)) - - case matchImportProbablyTypeScriptType: - repr.Meta.IsProbablyTypeScriptType[importRef] = true - - case matchImportAmbiguous: - namedImport := repr.AST.NamedImports[importRef] - r := js_lexer.RangeOfIdentifier(file.InputFile.Source, namedImport.AliasLoc) - var notes []logger.MsgData - - // Provide the locations of both ambiguous exports if possible - if result.nameLoc.Start != 0 && result.otherNameLoc.Start != 0 { - a := c.graph.Files[result.sourceIndex] - b := c.graph.Files[result.otherSourceIndex] - ra := js_lexer.RangeOfIdentifier(a.InputFile.Source, result.nameLoc) - rb := js_lexer.RangeOfIdentifier(b.InputFile.Source, result.otherNameLoc) - notes = []logger.MsgData{ - a.LineColumnTracker().MsgData(ra, "One matching export is here:"), - b.LineColumnTracker().MsgData(rb, "Another matching export is here:"), - } - } - - symbol := c.graph.Symbols.Get(importRef) - if symbol.ImportItemStatus == js_ast.ImportItemGenerated { - // This is a warning instead of an error because although it appears - // to be a named import, it's actually an automatically-generated - // named import that was originally a property access on an import - // star namespace object. Normally this property access would just - // resolve to undefined at run-time instead of failing at binding- - // time, so we emit a warning and rewrite the value to the literal - // "undefined" instead of emitting an error. - symbol.ImportItemStatus = js_ast.ImportItemMissing - msg := fmt.Sprintf("Import %q will always be undefined because there are multiple matching exports", namedImport.Alias) - c.log.AddWithNotes(logger.Warning, file.LineColumnTracker(), r, msg, notes) - } else { - msg := fmt.Sprintf("Ambiguous import %q has multiple matching exports", namedImport.Alias) - c.log.AddWithNotes(logger.Error, file.LineColumnTracker(), r, msg, notes) - } - } - } -} - -type matchImportKind uint8 - -const ( - // The import is either external or undefined - matchImportIgnore matchImportKind = iota - - // "sourceIndex" and "ref" are in use - matchImportNormal - - // "namespaceRef" and "alias" are in use - matchImportNamespace - - // Both "matchImportNormal" and "matchImportNamespace" - matchImportNormalAndNamespace - - // The import could not be evaluated due to a cycle - matchImportCycle - - // The import is missing but came from a TypeScript file - matchImportProbablyTypeScriptType - - // The import resolved to multiple symbols via "export * from" - matchImportAmbiguous -) - -type matchImportResult struct { - kind matchImportKind - namespaceRef js_ast.Ref - alias string - sourceIndex uint32 - nameLoc logger.Loc // Optional, goes with sourceIndex, ignore if zero - otherSourceIndex uint32 - otherNameLoc logger.Loc // Optional, goes with otherSourceIndex, ignore if zero - ref js_ast.Ref -} - -func (c *linkerContext) matchImportWithExport( - tracker importTracker, reExportsIn []js_ast.Dependency, -) (result matchImportResult, reExports []js_ast.Dependency) { - var ambiguousResults []matchImportResult - reExports = reExportsIn - -loop: - for { - // Make sure we avoid infinite loops trying to resolve cycles: - // - // // foo.js - // export {a as b} from './foo.js' - // export {b as c} from './foo.js' - // export {c as a} from './foo.js' - // - // This uses a O(n^2) array scan instead of a O(n) map because the vast - // majority of cases have one or two elements and Go arrays are cheap to - // reuse without allocating. - for _, previousTracker := range c.cycleDetector { - if tracker == previousTracker { - result = matchImportResult{kind: matchImportCycle} - break loop - } - } - c.cycleDetector = append(c.cycleDetector, tracker) - - // Resolve the import by one step - nextTracker, status, potentiallyAmbiguousExportStarRefs := c.advanceImportTracker(tracker) - switch status { - case importCommonJS, importCommonJSWithoutExports, importExternal, importDisabled: - if status == importExternal && c.options.OutputFormat.KeepES6ImportExportSyntax() { - // Imports from external modules should not be converted to CommonJS - // if the output format preserves the original ES6 import statements - break - } - - // If it's a CommonJS or external file, rewrite the import to a - // property access. Don't do this if the namespace reference is invalid - // though. This is the case for star imports, where the import is the - // namespace. - trackerFile := &c.graph.Files[tracker.sourceIndex] - namedImport := trackerFile.InputFile.Repr.(*graph.JSRepr).AST.NamedImports[tracker.importRef] - if namedImport.NamespaceRef != js_ast.InvalidRef { - if result.kind == matchImportNormal { - result.kind = matchImportNormalAndNamespace - result.namespaceRef = namedImport.NamespaceRef - result.alias = namedImport.Alias - } else { - result = matchImportResult{ - kind: matchImportNamespace, - namespaceRef: namedImport.NamespaceRef, - alias: namedImport.Alias, - } - } - } - - // Warn about importing from a file that is known to not have any exports - if status == importCommonJSWithoutExports { - symbol := c.graph.Symbols.Get(tracker.importRef) - symbol.ImportItemStatus = js_ast.ImportItemMissing - c.log.Add(logger.Warning, - trackerFile.LineColumnTracker(), - js_lexer.RangeOfIdentifier(trackerFile.InputFile.Source, namedImport.AliasLoc), - fmt.Sprintf("Import %q will always be undefined because the file %q has no exports", - namedImport.Alias, c.graph.Files[nextTracker.sourceIndex].InputFile.Source.PrettyPath)) - } - - case importDynamicFallback: - // If it's a file with dynamic export fallback, rewrite the import to a property access - trackerFile := &c.graph.Files[tracker.sourceIndex] - namedImport := trackerFile.InputFile.Repr.(*graph.JSRepr).AST.NamedImports[tracker.importRef] - if result.kind == matchImportNormal { - result.kind = matchImportNormalAndNamespace - result.namespaceRef = nextTracker.importRef - result.alias = namedImport.Alias - } else { - result = matchImportResult{ - kind: matchImportNamespace, - namespaceRef: nextTracker.importRef, - alias: namedImport.Alias, - } - } - - case importNoMatch: - symbol := c.graph.Symbols.Get(tracker.importRef) - trackerFile := &c.graph.Files[tracker.sourceIndex] - namedImport := trackerFile.InputFile.Repr.(*graph.JSRepr).AST.NamedImports[tracker.importRef] - r := js_lexer.RangeOfIdentifier(trackerFile.InputFile.Source, namedImport.AliasLoc) - - // Report mismatched imports and exports - if symbol.ImportItemStatus == js_ast.ImportItemGenerated { - // This is a warning instead of an error because although it appears - // to be a named import, it's actually an automatically-generated - // named import that was originally a property access on an import - // star namespace object. Normally this property access would just - // resolve to undefined at run-time instead of failing at binding- - // time, so we emit a warning and rewrite the value to the literal - // "undefined" instead of emitting an error. - symbol.ImportItemStatus = js_ast.ImportItemMissing - c.log.Add(logger.Warning, trackerFile.LineColumnTracker(), r, fmt.Sprintf( - "Import %q will always be undefined because there is no matching export in %q", - namedImport.Alias, c.graph.Files[nextTracker.sourceIndex].InputFile.Source.PrettyPath)) - } else { - c.log.Add(logger.Error, trackerFile.LineColumnTracker(), r, fmt.Sprintf("No matching export in %q for import %q", - c.graph.Files[nextTracker.sourceIndex].InputFile.Source.PrettyPath, namedImport.Alias)) - } - - case importProbablyTypeScriptType: - // Omit this import from any namespace export code we generate for - // import star statements (i.e. "import * as ns from 'path'") - result = matchImportResult{kind: matchImportProbablyTypeScriptType} - - case importFound: - // If there are multiple ambiguous results due to use of "export * from" - // statements, trace them all to see if they point to different things. - for _, ambiguousTracker := range potentiallyAmbiguousExportStarRefs { - // If this is a re-export of another import, follow the import - if _, ok := c.graph.Files[ambiguousTracker.SourceIndex].InputFile.Repr.(*graph.JSRepr).AST.NamedImports[ambiguousTracker.Ref]; ok { - // Save and restore the cycle detector to avoid mixing information - oldCycleDetector := c.cycleDetector - ambiguousResult, newReExportFiles := c.matchImportWithExport(importTracker{ - sourceIndex: ambiguousTracker.SourceIndex, - importRef: ambiguousTracker.Ref, - }, reExports) - c.cycleDetector = oldCycleDetector - ambiguousResults = append(ambiguousResults, ambiguousResult) - reExports = newReExportFiles - } else { - ambiguousResults = append(ambiguousResults, matchImportResult{ - kind: matchImportNormal, - sourceIndex: ambiguousTracker.SourceIndex, - ref: ambiguousTracker.Ref, - nameLoc: ambiguousTracker.NameLoc, - }) - } - } - - // Defer the actual binding of this import until after we generate - // namespace export code for all files. This has to be done for all - // import-to-export matches, not just the initial import to the final - // export, since all imports and re-exports must be merged together - // for correctness. - result = matchImportResult{ - kind: matchImportNormal, - sourceIndex: nextTracker.sourceIndex, - ref: nextTracker.importRef, - nameLoc: nextTracker.nameLoc, - } - - // Depend on the statement(s) that declared this import symbol in the - // original file - for _, resolvedPartIndex := range c.graph.Files[tracker.sourceIndex].InputFile.Repr.(*graph.JSRepr).TopLevelSymbolToParts(tracker.importRef) { - reExports = append(reExports, js_ast.Dependency{ - SourceIndex: tracker.sourceIndex, - PartIndex: resolvedPartIndex, - }) - } - - // If this is a re-export of another import, continue for another - // iteration of the loop to resolve that import as well - if _, ok := c.graph.Files[nextTracker.sourceIndex].InputFile.Repr.(*graph.JSRepr).AST.NamedImports[nextTracker.importRef]; ok { - tracker = nextTracker - continue - } - - default: - panic("Internal error") - } - - // Stop now if we didn't explicitly "continue" above - break - } - - // If there is a potential ambiguity, all results must be the same - for _, ambiguousResult := range ambiguousResults { - if ambiguousResult != result { - if result.kind == matchImportNormal && ambiguousResult.kind == matchImportNormal && - result.nameLoc.Start != 0 && ambiguousResult.nameLoc.Start != 0 { - return matchImportResult{ - kind: matchImportAmbiguous, - sourceIndex: result.sourceIndex, - nameLoc: result.nameLoc, - otherSourceIndex: ambiguousResult.sourceIndex, - otherNameLoc: ambiguousResult.nameLoc, - }, nil - } - return matchImportResult{kind: matchImportAmbiguous}, nil - } - } - - return -} - -func (c *linkerContext) recursivelyWrapDependencies(sourceIndex uint32) { - repr := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - if repr.Meta.DidWrapDependencies { - return - } - repr.Meta.DidWrapDependencies = true - - // Never wrap the runtime file since it always comes first - if sourceIndex == runtime.SourceIndex { - return - } - - // This module must be wrapped - if repr.Meta.Wrap == graph.WrapNone { - if repr.AST.ExportsKind == js_ast.ExportsCommonJS { - repr.Meta.Wrap = graph.WrapCJS - } else { - repr.Meta.Wrap = graph.WrapESM - } - } - - // All dependencies must also be wrapped - for _, record := range repr.AST.ImportRecords { - if record.SourceIndex.IsValid() { - c.recursivelyWrapDependencies(record.SourceIndex.GetIndex()) - } - } -} - -func (c *linkerContext) hasDynamicExportsDueToExportStar(sourceIndex uint32, visited map[uint32]bool) bool { - // Terminate the traversal now if this file already has dynamic exports - repr := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - if repr.AST.ExportsKind == js_ast.ExportsCommonJS || repr.AST.ExportsKind == js_ast.ExportsESMWithDynamicFallback { - return true - } - - // Avoid infinite loops due to cycles in the export star graph - if visited[sourceIndex] { - return false - } - visited[sourceIndex] = true - - // Scan over the export star graph - for _, importRecordIndex := range repr.AST.ExportStarImportRecords { - record := &repr.AST.ImportRecords[importRecordIndex] - - // This file has dynamic exports if the exported imports are from a file - // that either has dynamic exports directly or transitively by itself - // having an export star from a file with dynamic exports. - if (!record.SourceIndex.IsValid() && (!c.graph.Files[sourceIndex].IsEntryPoint() || !c.options.OutputFormat.KeepES6ImportExportSyntax())) || - (record.SourceIndex.IsValid() && record.SourceIndex.GetIndex() != sourceIndex && c.hasDynamicExportsDueToExportStar(record.SourceIndex.GetIndex(), visited)) { - repr.AST.ExportsKind = js_ast.ExportsESMWithDynamicFallback - return true - } - } - - return false -} - -func (c *linkerContext) addExportsForExportStar( - resolvedExports map[string]graph.ExportData, - sourceIndex uint32, - sourceIndexStack []uint32, -) { - // Avoid infinite loops due to cycles in the export star graph - for _, prevSourceIndex := range sourceIndexStack { - if prevSourceIndex == sourceIndex { - return - } - } - sourceIndexStack = append(sourceIndexStack, sourceIndex) - repr := c.graph.Files[sourceIndex].InputFile.Repr.(*graph.JSRepr) - - for _, importRecordIndex := range repr.AST.ExportStarImportRecords { - record := &repr.AST.ImportRecords[importRecordIndex] - if !record.SourceIndex.IsValid() { - // This will be resolved at run time instead - continue - } - otherSourceIndex := record.SourceIndex.GetIndex() - - // Export stars from a CommonJS module don't work because they can't be - // statically discovered. Just silently ignore them in this case. - // - // We could attempt to check whether the imported file still has ES6 - // exports even though it still uses CommonJS features. However, when - // doing this we'd also have to rewrite any imports of these export star - // re-exports as property accesses off of a generated require() call. - otherRepr := c.graph.Files[otherSourceIndex].InputFile.Repr.(*graph.JSRepr) - if otherRepr.AST.ExportsKind == js_ast.ExportsCommonJS { - // All exports will be resolved at run time instead - continue - } - - // Accumulate this file's exports - nextExport: - for alias, name := range otherRepr.AST.NamedExports { - // ES6 export star statements ignore exports named "default" - if alias == "default" { - continue - } - - // This export star is shadowed if any file in the stack has a matching real named export - for _, prevSourceIndex := range sourceIndexStack { - prevRepr := c.graph.Files[prevSourceIndex].InputFile.Repr.(*graph.JSRepr) - if _, ok := prevRepr.AST.NamedExports[alias]; ok { - continue nextExport - } - } - - if existing, ok := resolvedExports[alias]; !ok { - // Initialize the re-export - resolvedExports[alias] = graph.ExportData{ - Ref: name.Ref, - SourceIndex: otherSourceIndex, - NameLoc: name.AliasLoc, - } - - // Make sure the symbol is marked as imported so that code splitting - // imports it correctly if it ends up being shared with another chunk - repr.Meta.ImportsToBind[name.Ref] = graph.ImportData{ - Ref: name.Ref, - SourceIndex: otherSourceIndex, - } - } else if existing.SourceIndex != otherSourceIndex { - // Two different re-exports colliding makes it potentially ambiguous - existing.PotentiallyAmbiguousExportStarRefs = - append(existing.PotentiallyAmbiguousExportStarRefs, graph.ImportData{ - SourceIndex: otherSourceIndex, - Ref: name.Ref, - NameLoc: name.AliasLoc, - }) - resolvedExports[alias] = existing - } - } - - // Search further through this file's export stars - c.addExportsForExportStar(resolvedExports, otherSourceIndex, sourceIndexStack) - } -} - -type importTracker struct { - sourceIndex uint32 - nameLoc logger.Loc // Optional, goes with sourceIndex, ignore if zero - importRef js_ast.Ref -} - -type importStatus uint8 - -const ( - // The imported file has no matching export - importNoMatch importStatus = iota - - // The imported file has a matching export - importFound - - // The imported file is CommonJS and has unknown exports - importCommonJS - - // The import is missing but there is a dynamic fallback object - importDynamicFallback - - // The import was treated as a CommonJS import but the file is known to have no exports - importCommonJSWithoutExports - - // The imported file was disabled by mapping it to false in the "browser" - // field of package.json - importDisabled - - // The imported file is external and has unknown exports - importExternal - - // This is a missing re-export in a TypeScript file, so it's probably a type - importProbablyTypeScriptType -) - -func (c *linkerContext) advanceImportTracker(tracker importTracker) (importTracker, importStatus, []graph.ImportData) { - file := &c.graph.Files[tracker.sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - namedImport := repr.AST.NamedImports[tracker.importRef] - - // Is this an external file? - record := &repr.AST.ImportRecords[namedImport.ImportRecordIndex] - if !record.SourceIndex.IsValid() { - return importTracker{}, importExternal, nil - } - - // Is this a disabled file? - otherSourceIndex := record.SourceIndex.GetIndex() - if c.graph.Files[otherSourceIndex].InputFile.Source.KeyPath.IsDisabled() { - return importTracker{sourceIndex: otherSourceIndex, importRef: js_ast.InvalidRef}, importDisabled, nil - } - - // Is this a named import of a file without any exports? - otherRepr := c.graph.Files[otherSourceIndex].InputFile.Repr.(*graph.JSRepr) - if !namedImport.AliasIsStar && !otherRepr.AST.HasLazyExport && - // CommonJS exports - otherRepr.AST.ExportKeyword.Len == 0 && namedImport.Alias != "default" && - // ESM exports - !otherRepr.AST.UsesExportsRef && !otherRepr.AST.UsesModuleRef { - // Just warn about it and replace the import with "undefined" - return importTracker{sourceIndex: otherSourceIndex, importRef: js_ast.InvalidRef}, importCommonJSWithoutExports, nil - } - - // Is this a CommonJS file? - if otherRepr.AST.ExportsKind == js_ast.ExportsCommonJS { - return importTracker{sourceIndex: otherSourceIndex, importRef: js_ast.InvalidRef}, importCommonJS, nil - } - - // Match this import star with an export star from the imported file - if matchingExport := otherRepr.Meta.ResolvedExportStar; namedImport.AliasIsStar && matchingExport != nil { - // Check to see if this is a re-export of another import - return importTracker{ - sourceIndex: matchingExport.SourceIndex, - importRef: matchingExport.Ref, - nameLoc: matchingExport.NameLoc, - }, importFound, matchingExport.PotentiallyAmbiguousExportStarRefs - } - - // Match this import up with an export from the imported file - if matchingExport, ok := otherRepr.Meta.ResolvedExports[namedImport.Alias]; ok { - // Check to see if this is a re-export of another import - return importTracker{ - sourceIndex: matchingExport.SourceIndex, - importRef: matchingExport.Ref, - nameLoc: matchingExport.NameLoc, - }, importFound, matchingExport.PotentiallyAmbiguousExportStarRefs - } - - // Is this a file with dynamic exports? - if otherRepr.AST.ExportsKind == js_ast.ExportsESMWithDynamicFallback { - return importTracker{sourceIndex: otherSourceIndex, importRef: otherRepr.AST.ExportsRef}, importDynamicFallback, nil - } - - // Missing re-exports in TypeScript files are indistinguishable from types - if file.InputFile.Loader.IsTypeScript() && namedImport.IsExported { - return importTracker{}, importProbablyTypeScriptType, nil - } - - return importTracker{sourceIndex: otherSourceIndex}, importNoMatch, nil -} - -func (c *linkerContext) treeShakingAndCodeSplitting() { - // Tree shaking: Each entry point marks all files reachable from itself - c.timer.Begin("Tree shaking") - for _, entryPoint := range c.graph.EntryPoints() { - c.markFileLiveForTreeShaking(entryPoint.SourceIndex) - } - c.timer.End("Tree shaking") - - // Code splitting: Determine which entry points can reach which files. This - // has to happen after tree shaking because there is an implicit dependency - // between live parts within the same file. All liveness has to be computed - // first before determining which entry points can reach which files. - c.timer.Begin("Code splitting") - for i, entryPoint := range c.graph.EntryPoints() { - c.markFileReachableForCodeSplitting(entryPoint.SourceIndex, uint(i), 0) - } - c.timer.End("Code splitting") -} - -func (c *linkerContext) markFileReachableForCodeSplitting(sourceIndex uint32, entryPointBit uint, distanceFromEntryPoint uint32) { - file := &c.graph.Files[sourceIndex] - if !file.IsLive { - return - } - traverseAgain := false - - // Track the minimum distance to an entry point - if distanceFromEntryPoint < file.DistanceFromEntryPoint { - file.DistanceFromEntryPoint = distanceFromEntryPoint - traverseAgain = true - } - distanceFromEntryPoint++ - - // Don't mark this file more than once - if file.EntryBits.HasBit(entryPointBit) && !traverseAgain { - return - } - file.EntryBits.SetBit(entryPointBit) - - switch repr := file.InputFile.Repr.(type) { - case *graph.JSRepr: - // If the JavaScript stub for a CSS file is included, also include the CSS file - if repr.CSSSourceIndex.IsValid() { - c.markFileReachableForCodeSplitting(repr.CSSSourceIndex.GetIndex(), entryPointBit, distanceFromEntryPoint) - } - - // Traverse into all imported files - for _, record := range repr.AST.ImportRecords { - if record.SourceIndex.IsValid() && !c.isExternalDynamicImport(&record, sourceIndex) { - c.markFileReachableForCodeSplitting(record.SourceIndex.GetIndex(), entryPointBit, distanceFromEntryPoint) - } - } - - // Traverse into all dependencies of all parts in this file - for _, part := range repr.AST.Parts { - for _, dependency := range part.Dependencies { - if dependency.SourceIndex != sourceIndex { - c.markFileReachableForCodeSplitting(dependency.SourceIndex, entryPointBit, distanceFromEntryPoint) - } - } - } - - case *graph.CSSRepr: - // Traverse into all dependencies - for _, record := range repr.AST.ImportRecords { - if record.SourceIndex.IsValid() { - c.markFileReachableForCodeSplitting(record.SourceIndex.GetIndex(), entryPointBit, distanceFromEntryPoint) - } - } - } -} - -func (c *linkerContext) markFileLiveForTreeShaking(sourceIndex uint32) { - file := &c.graph.Files[sourceIndex] - - // Don't mark this file more than once - if file.IsLive { - return - } - file.IsLive = true - - switch repr := file.InputFile.Repr.(type) { - case *graph.JSRepr: - // If the JavaScript stub for a CSS file is included, also include the CSS file - if repr.CSSSourceIndex.IsValid() { - c.markFileLiveForTreeShaking(repr.CSSSourceIndex.GetIndex()) - } - - for partIndex, part := range repr.AST.Parts { - canBeRemovedIfUnused := part.CanBeRemovedIfUnused - - // Also include any statement-level imports - for _, importRecordIndex := range part.ImportRecordIndices { - record := &repr.AST.ImportRecords[importRecordIndex] - if record.Kind != ast.ImportStmt { - continue - } - - if record.SourceIndex.IsValid() { - otherSourceIndex := record.SourceIndex.GetIndex() - - // Don't include this module for its side effects if it can be - // considered to have no side effects - if otherFile := &c.graph.Files[otherSourceIndex]; otherFile.InputFile.SideEffects.Kind != graph.HasSideEffects && !c.options.IgnoreDCEAnnotations { - continue - } - - // Otherwise, include this module for its side effects - c.markFileLiveForTreeShaking(otherSourceIndex) - } - - // If we get here then the import was included for its side effects, so - // we must also keep this part - canBeRemovedIfUnused = false - } - - // Include all parts in this file with side effects, or just include - // everything if tree-shaking is disabled. Note that we still want to - // perform tree-shaking on the runtime even if tree-shaking is disabled. - if !canBeRemovedIfUnused || (!part.ForceTreeShaking && !c.options.TreeShaking && file.IsEntryPoint()) { - c.markPartLiveForTreeShaking(sourceIndex, uint32(partIndex)) - } - } - - case *graph.CSSRepr: - // Include all "@import" rules - for _, record := range repr.AST.ImportRecords { - if record.SourceIndex.IsValid() { - c.markFileLiveForTreeShaking(record.SourceIndex.GetIndex()) - } - } - } -} - -func (c *linkerContext) isExternalDynamicImport(record *ast.ImportRecord, sourceIndex uint32) bool { - return record.Kind == ast.ImportDynamic && c.graph.Files[record.SourceIndex.GetIndex()].IsEntryPoint() && record.SourceIndex.GetIndex() != sourceIndex -} - -func (c *linkerContext) markPartLiveForTreeShaking(sourceIndex uint32, partIndex uint32) { - file := &c.graph.Files[sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - part := &repr.AST.Parts[partIndex] - - // Don't mark this part more than once - if part.IsLive { - return - } - part.IsLive = true - - // Include the file containing this part - c.markFileLiveForTreeShaking(sourceIndex) - - // Also include any dependencies - for _, dep := range part.Dependencies { - c.markPartLiveForTreeShaking(dep.SourceIndex, dep.PartIndex) - } -} - -func sanitizeFilePathForVirtualModulePath(path string) string { - // Convert it to a safe file path. See: https://stackoverflow.com/a/31976060 - sb := strings.Builder{} - needsGap := false - for _, c := range path { - switch c { - case 0: - // These characters are forbidden on Unix and Windows - - case '<', '>', ':', '"', '|', '?', '*': - // These characters are forbidden on Windows - - default: - if c < 0x20 { - // These characters are forbidden on Windows - break - } - - // Turn runs of invalid characters into a '_' - if needsGap { - sb.WriteByte('_') - needsGap = false - } - - sb.WriteRune(c) - continue - } - - if sb.Len() > 0 { - needsGap = true - } - } - - // Make sure the name isn't empty - if sb.Len() == 0 { - return "_" - } - - // Note: An extension will be added to this base name, so there is no need to - // avoid forbidden file names such as ".." since ".js" is a valid file name. - return sb.String() -} - -// JavaScript modules are traversed in depth-first postorder. This is the -// order that JavaScript modules were evaluated in before the top-level await -// feature was introduced. -// -// A -// / \ -// B C -// \ / -// D -// -// If A imports B and then C, B imports D, and C imports D, then the JavaScript -// traversal order is D B C A. -// -// This function may deviate from ESM import order for dynamic imports (both -// "require()" and "import()"). This is because the import order is impossible -// to determine since the imports happen at run-time instead of compile-time. -// In this case we just pick an arbitrary but consistent order. -func (c *linkerContext) findImportedCSSFilesInJSOrder(entryPoint uint32) (order []uint32) { - visited := make(map[uint32]bool) - var visit func(uint32, ast.Index32) - - // Include this file and all files it imports - visit = func(sourceIndex uint32, importerIndex ast.Index32) { - if visited[sourceIndex] { - return - } - visited[sourceIndex] = true - file := &c.graph.Files[sourceIndex] - repr := file.InputFile.Repr.(*graph.JSRepr) - - // Iterate over each part in the file in order - for _, part := range repr.AST.Parts { - // Ignore dead code that has been removed from the bundle. Any code - // that's reachable from the entry point, even through lazy dynamic - // imports, could end up being activated by the bundle and needs its - // CSS to be included. This may change if/when code splitting is - // supported for CSS. - if !part.IsLive { - continue - } - - // Traverse any files imported by this part. Note that CommonJS calls - // to "require()" count as imports too, sort of as if the part has an - // ESM "import" statement in it. This may seem weird because ESM imports - // are a compile-time concept while CommonJS imports are a run-time - // concept. But we don't want to manipulate