New version

npmproxy.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/trading-peter/gowebbuild/npmproxy"
+	"github.com/urfave/cli/v2"
+)
+
+func proxyAction(ctx *cli.Context) error {
+	cfgPath, err := filepath.Abs(ctx.String("c"))
+
+	if err != nil {
+		return err
+	}
+
+	projectDir := filepath.Dir(cfgPath)
+	os.Chdir(projectDir)
+	opts := readCfg(cfgPath)
+
+	return runProxy(ctx.Context, projectDir, opts)
+}
+
+func runProxy(ctx context.Context, projectDir string, opts []options) error {
+	overrides := []NpmProxyOverride{}
+
+	for _, o := range opts {
+		overrides = append(overrides, o.NpmProxy.Overrides...)
+	}
+
+	if len(overrides) == 0 {
+		return nil
+	}
+
+	fmt.Printf("Found %d npm overrides. Starting proxy server.\n", len(overrides))
+
+	// if fs.IsFile(filepath.Join(projectDir, ".npmrc")) {
+	// 	return fmt.Errorf(".npmrc file already exists in project root.")
+	// }
+
+	freePort := findFreePort(10000, 20000)
+	freePortInternal := findFreePort(20001, 30000)
+
+	if freePort == -1 || freePortInternal == -1 {
+		return fmt.Errorf("Failed to find free ports for proxy setup.")
+	}
+
+	list := []npmproxy.Override{}
+	npmrcRules := []string{
+		";CREATED BY GOWEBBUILD. DO NOT EDIT.",
+		";This file is used by the npm proxy server.",
+		";It is used to override the default registry for specific package namespaces.",
+		";This file will be removed after the proxy server is stopped.",
+	}
+
+	for _, o := range overrides {
+		list = append(list, npmproxy.Override{
+			Namespace:   o.Namespace,
+			Upstream:    o.Upstream,
+			PackageRoot: o.PackageRoot,
+		})
+
+		npmrcRules = append(npmrcRules, fmt.Sprintf("%s:registry=http://localhost:%d", o.Namespace, freePort))
+	}
+
+	err := os.WriteFile(filepath.Join(projectDir, ".npmrc"), []byte(strings.Join(npmrcRules, "\n")), 0644)
+	if err != nil {
+		return err
+	}
+
+	defer os.Remove(filepath.Join(projectDir, ".npmrc"))
+
+	proxy := npmproxy.New(
+		list,
+		projectDir,
+		npmproxy.WithPort(freePort),
+		npmproxy.WithInternalPort(freePortInternal),
+	)
+
+	proxy.Start(ctx)
+	fmt.Println("Stopped npm proxy server")
+	return nil
+}