Add template support.

templates.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	_ "embed"
+	"fmt"
+	"os"
+	"path/filepath"
+	"text/template"
+
+	"github.com/Iilun/survey/v2"
+	"github.com/kataras/golog"
+	"github.com/urfave/cli/v2"
+)
+
+//go:embed templates/tpl.gowebbuild.yaml
+var sampleConfig string
+
+//go:embed templates/docker_image.sh
+var dockerImage string
+
+//go:embed templates/Dockerfile
+var dockerFile string
+
+var qs = []*survey.Question{
+	{
+		Name: "tpl",
+		Prompt: &survey.Select{
+			Message: "Choose a template:",
+			Options: []string{".gowebbuild.yaml", "docker_image.sh", "Dockerfile"},
+			Default: "docker_image.sh",
+		},
+	},
+}
+
+func tplAction(ctx *cli.Context) error {
+	cfgPath, err := filepath.Abs(ctx.String("c"))
+
+	if err != nil {
+		return err
+	}
+
+	os.Chdir(filepath.Dir(cfgPath))
+
+	answers := struct {
+		Template string `survey:"tpl"`
+	}{}
+
+	err = survey.Ask(qs, &answers)
+	if err != nil {
+		return err
+	}
+
+	var tpl string
+	var fileName string
+
+	switch answers.Template {
+	case ".gowebbuild.yaml":
+		tpl = sampleConfig
+		fileName = ".gowebbuild.yaml"
+	case "docker_image.sh":
+		tpl = dockerImage
+		fileName = "docker_image.sh"
+	case "Dockerfile":
+		tpl = dockerFile
+		fileName = "Dockerfile"
+	default:
+		golog.Fatal("Invalid template")
+	}
+
+	if isFile(fileName) {
+		fmt.Printf("File \"%s\" already exists.\n", fileName)
+		return nil
+	}
+
+	outFile, err := os.Create(fileName)
+	if err != nil {
+		return err
+	}
+
+	defer outFile.Close()
+
+	context := map[string]string{
+		"ProjectFolderName": filepath.Base(filepath.Dir(cfgPath)),
+	}
+
+	if moduleName, err := getGoModuleName(filepath.Dir(cfgPath)); err == nil {
+		context["GoModuleName"] = moduleName
+	}
+
+	err = template.Must(template.New("tpl").Parse(tpl)).Execute(outFile, context)
+
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Created \"%s\" in project root.\n", fileName)
+
+	return nil
+}