add ability to set up a webapp

cmd/cli/webapp.go

@@ -0,0 +1,214 @@
+package main
+
+import (
+	_ "embed"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+//go:embed templates/vue/AboutView.vue.tmpl
+var aboutViewTemplate string
+
+//go:embed templates/vue/HomeView.vue.tmpl
+var homeViewTemplate string
+
+func setupWebapp(name string) error {
+	fmt.Println("Setting up webapp with Vue 3, TypeScript, Vue Router, Pinia, and ESLint with Prettier")
+	cmd := exec.Command("npm", "create", "vue@latest", "--", "--ts", "--router", "--pinia", "--eslint-with-prettier", name)
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("error setting up webapp | %w", err)
+	}
+
+	fmt.Println("Switching to the new directory")
+	// cd into the new directory
+	err = os.Chdir(name)
+	if err != nil {
+		return fmt.Errorf("error changing directory | %w", err)
+	}
+
+	fmt.Println("Installing base dependencies")
+	// install all dependencies and format the code
+	cmd = exec.Command("npm", "install", "&&", "npm", "run", "format")
+	err = cmd.Run()
+	if err != nil {
+		return fmt.Errorf("error changing directory | %w", err)
+	}
+
+	// make src/assets/base.css and src/assets/main.css mostly empty files
+	err = os.WriteFile("src/assets/base.css", []byte(""), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing base.css | %w", err)
+	}
+	err = os.WriteFile("src/assets/main.css", []byte("@import './base.css';"), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing main.css | %w", err)
+	}
+
+	fmt.Println("Setting up Tailwind CSS")
+	err = setupTailwind()
+	if err != nil {
+		return fmt.Errorf("error setting up tailwind | %w", err)
+	}
+
+	// clean up the default example files
+	err = removeListOfFiles([]string{
+		"src/components/HelloWorld.vue",
+		"src/components/TheWelcome.vue",
+		"src/components/WelcomeItem.vue",
+		"src/views/AboutView.vue", // replace with new AboutView.vue
+		"src/components/icons/IconCommunity.vue",
+		"src/components/icons/IconDocumentation.vue",
+		"src/components/icons/IconEcosystem.vue",
+		"src/components/icons/IconSupport.vue",
+		"src/components/icons/IconTooling.vue",
+		"src/assets/logo.svg",
+	})
+
+	// create a new about view from the aboutViewTemplate
+	err = os.WriteFile("src/views/AboutView.vue", []byte(aboutViewTemplate), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing new AboutView.vue | %w", err)
+	}
+	// create a new home view from the homeViewTemplate
+	err = os.WriteFile("src/views/HomeView.vue", []byte(homeViewTemplate), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing new HomeView.vue | %w", err)
+	}
+
+	fmt.Println("Exiting the new directory")
+	err = os.Chdir("..")
+	if err != nil {
+		return fmt.Errorf("error changing directory | %w", err)
+	}
+
+	return nil
+}
+
+func setupTailwind() error {
+	// check that there is a vite.config.ts file and a package.json file
+	_, err := os.Stat("vite.config.ts")
+	if err != nil {
+		return fmt.Errorf("error checking for vite.config.ts | %w", err)
+	}
+	_, err = os.Stat("package.json")
+	if err != nil {
+		return fmt.Errorf("error checking for package.json | %w", err)
+	}
+
+	cmd := exec.Command("npm", "install", "tailwindcss", "@tailwindcss/vite")
+	err = cmd.Run()
+	if err != nil {
+		return fmt.Errorf("error installing tailwindcss | %w", err)
+	}
+
+	// In the vite.config.ts insert the following code after the last import statement `import tailwindcss from '@tailwindcss/vite'`
+	err = insertImportStatement("import tailwindcss from '@tailwindcss/vite'", "vite.config.ts")
+	if err != nil {
+		return fmt.Errorf("error inserting import statement | %w", err)
+	}
+
+	// In the vite.config.ts insert the following code after the last plugin usage `tailwindcss(),`
+	err = insertPluginUsage("    tailwindcss(),", "vite.config.ts")
+	if err != nil {
+		return fmt.Errorf("error inserting plugin usage | %w", err)
+	}
+
+	// in the base.css file add an @import statement for tailwind
+	// check that './src/assets/base.css' exists
+	_, err = os.Stat("./src/assets/base.css")
+	if err != nil {
+		return fmt.Errorf("error checking for base.css | %w", err)
+	}
+	err = insertAtTopLineOfFile("@import \"tailwindcss\";", "./src/assets/base.css")
+	if err != nil {
+		return fmt.Errorf("error inserting import statement | %w", err)
+	}
+	return nil
+}
+
+func insertImportStatement(importStatement string, filename string) error {
+	fileContent, err := os.ReadFile(fmt.Sprintf(".%c%s", os.PathSeparator, filename))
+	if err != nil {
+		return fmt.Errorf("error reading %s | %w", filename, err)
+	}
+
+	fileLines := strings.Split(strings.ReplaceAll(string(fileContent), "\r\n", "\n"), "\n")
+	lastImportIndex := -1
+	// finds the last import statement in the file and appends after that one
+	for i, line := range fileLines {
+		if strings.HasPrefix(line, "import") {
+			lastImportIndex = i
+		}
+	}
+	if lastImportIndex != -1 {
+		fileLines = append(fileLines[:lastImportIndex+1], append([]string{importStatement}, fileLines[lastImportIndex+1:]...)...)
+	} else {
+		// add the import to the top of the file
+		fileLines = append([]string{importStatement}, fileLines...)
+	}
+
+	err = os.WriteFile(filename, []byte(strings.Join(fileLines, "\n")), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing vite.config.ts | %w", err)
+	}
+	return nil
+}
+
+func insertPluginUsage(pluginUsage string, filename string) error {
+	fileContent, err := os.ReadFile(fmt.Sprintf(".%c%s", os.PathSeparator, filename))
+	if err != nil {
+		return fmt.Errorf("error reading %s | %w", filename, err)
+	}
+
+	fileLines := strings.Split(strings.ReplaceAll(string(fileContent), "\r\n", "\n"), "\n")
+	startOfPluginsIndex := -1
+	// finds the `plugins: [` line in the file and appends after that one
+	for i, line := range fileLines {
+		if strings.Contains(line, "plugins: [") {
+			startOfPluginsIndex = i
+		}
+	}
+	if startOfPluginsIndex != -1 {
+		fileLines = append(fileLines[:startOfPluginsIndex+1], append([]string{pluginUsage}, fileLines[startOfPluginsIndex+1:]...)...)
+	} else {
+		// add the import to the top of the file
+		fileLines = append([]string{pluginUsage}, fileLines...)
+	}
+
+	err = os.WriteFile(filename, []byte(strings.Join(fileLines, "\n")), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing vite.config.ts | %w", err)
+	}
+	return nil
+}
+
+func insertAtTopLineOfFile(content string, filename string) error {
+	fileContent, err := os.ReadFile(fmt.Sprintf(".%c%s", os.PathSeparator, filename))
+	if err != nil {
+		return fmt.Errorf("error reading %s | %w", filename, err)
+	}
+
+	fileLines := strings.Split(strings.ReplaceAll(string(fileContent), "\r\n", "\n"), "\n")
+	fileLines = append([]string{content}, fileLines...)
+
+	err = os.WriteFile(filename, []byte(strings.Join(fileLines, "\n")), 0644)
+	if err != nil {
+		return fmt.Errorf("error writing vite.config.ts | %w", err)
+	}
+	return nil
+}
+
+func removeListOfFiles(files []string) error {
+
+	for _, file := range files {
+		err := os.Remove(file)
+		if err != nil {
+			return fmt.Errorf("error removing %s | %w", file, err)
+		}
+	}
+
+	return nil
+}