Example #1
0
func main() {
	flags := flag.NewFlagSet("", flag.ContinueOnError)
	cmd := "help"
	var cmdArgs []string
	if err := flags.Parse(os.Args[1:]); err == nil && flags.NArg() != 0 {
		cmd = flags.Arg(0)
		cmdArgs = flags.Args()[1:]
		if cmd == "help" && flags.NArg() == 2 {
			cmd = flags.Arg(1)
			cmdArgs = []string{"--help"}
		}
	}

	options := &gbuild.Options{CreateMapFile: true}
	switch cmd {
	case "build":
		buildFlags := flag.NewFlagSet("build command", flag.ExitOnError)
		var pkgObj string
		buildFlags.StringVar(&pkgObj, "o", "", "output file")
		buildFlags.BoolVar(&options.Verbose, "v", false, "print the names of packages as they are compiled")
		buildFlags.BoolVar(&options.Watch, "w", false, "watch for changes to the source files")
		buildFlags.BoolVar(&options.Minify, "m", false, "minify generated code")
		buildFlags.Parse(cmdArgs)

		for {
			s := gbuild.NewSession(options)

			exitCode := handleError(func() error {
				if buildFlags.NArg() == 0 {
					return s.BuildDir(currentDirectory, currentDirectory, pkgObj)
				}

				if strings.HasSuffix(buildFlags.Arg(0), ".go") {
					for _, arg := range buildFlags.Args() {
						if !strings.HasSuffix(arg, ".go") {
							return fmt.Errorf("named files must be .go files")
						}
					}
					if pkgObj == "" {
						basename := filepath.Base(buildFlags.Arg(0))
						pkgObj = basename[:len(basename)-3] + ".js"
					}
					names := make([]string, buildFlags.NArg())
					for i, name := range buildFlags.Args() {
						name = filepath.ToSlash(name)
						names[i] = name
						if s.Watcher != nil {
							s.Watcher.Watch(filepath.ToSlash(name))
						}
					}
					if err := s.BuildFiles(buildFlags.Args(), pkgObj, currentDirectory); err != nil {
						return err
					}
					return nil
				}

				for _, pkgPath := range buildFlags.Args() {
					pkgPath = filepath.ToSlash(pkgPath)
					if s.Watcher != nil {
						s.Watcher.Watch(pkgPath)
					}
					buildPkg, err := gbuild.Import(pkgPath, 0, s.ArchSuffix())
					if err != nil {
						return err
					}
					pkg := &gbuild.PackageData{Package: buildPkg}
					if err := s.BuildPackage(pkg); err != nil {
						return err
					}
					if pkgObj == "" {
						pkgObj = filepath.Base(buildFlags.Arg(0)) + ".js"
					}
					if err := s.WriteCommandPackage(pkg, pkgObj); err != nil {
						return err
					}
				}
				return nil
			})

			if s.Watcher == nil {
				os.Exit(exitCode)
			}
			s.WaitForChange()
		}

	case "install":
		installFlags := flag.NewFlagSet("install command", flag.ExitOnError)
		installFlags.BoolVar(&options.Verbose, "v", false, "print the names of packages as they are compiled")
		installFlags.BoolVar(&options.Watch, "w", false, "watch for changes to the source files")
		installFlags.BoolVar(&options.Minify, "m", false, "minify generated code")
		installFlags.Parse(cmdArgs)

		for {
			s := gbuild.NewSession(options)

			exitCode := handleError(func() error {
				pkgs := installFlags.Args()
				if len(pkgs) == 0 {
					firstGopathWorkspace := filepath.SplitList(build.Default.GOPATH)[0] // TODO: The GOPATH workspace that contains the package source should be chosen.
					srcDir, err := filepath.EvalSymlinks(filepath.Join(firstGopathWorkspace, "src"))
					if err != nil {
						return err
					}
					if !strings.HasPrefix(currentDirectory, srcDir) {
						return fmt.Errorf("gopherjs install: no install location for directory %s outside GOPATH", currentDirectory)
					}
					pkgPath, err := filepath.Rel(srcDir, currentDirectory)
					if err != nil {
						return err
					}
					pkgs = []string{pkgPath}
				}
				for _, pkgPath := range pkgs {
					pkgPath = filepath.ToSlash(pkgPath)
					if _, err := s.ImportPackage(pkgPath); err != nil {
						return err
					}
					pkg := s.Packages[pkgPath]
					if err := s.WriteCommandPackage(pkg, pkg.PkgObj); err != nil {
						return err
					}
				}
				return nil
			})

			if s.Watcher == nil {
				os.Exit(exitCode)
			}
			s.WaitForChange()
		}

	case "run":
		runFlags := flag.NewFlagSet("run command", flag.ExitOnError)
		runFlags.Parse(cmdArgs)

		os.Exit(handleError(func() error {
			lastSourceArg := 0
			for {
				if !strings.HasSuffix(runFlags.Arg(lastSourceArg), ".go") {
					break
				}
				lastSourceArg++
			}
			if lastSourceArg == 0 {
				return fmt.Errorf("gopherjs run: no go files listed")
			}

			tempfile, err := ioutil.TempFile("", filepath.Base(runFlags.Arg(0))+".")
			if err != nil {
				return err
			}
			defer func() {
				tempfile.Close()
				os.Remove(tempfile.Name())
			}()
			s := gbuild.NewSession(options)
			if err := s.BuildFiles(runFlags.Args()[:lastSourceArg], tempfile.Name(), currentDirectory); err != nil {
				return err
			}
			if err := runNode(tempfile.Name(), runFlags.Args()[lastSourceArg:], ""); err != nil {
				return err
			}
			return nil
		}))

	case "test":
		testFlags := flag.NewFlagSet("test command", flag.ExitOnError)
		verbose := testFlags.Bool("v", false, "verbose")
		short := testFlags.Bool("short", false, "short")
		testFlags.BoolVar(&options.Minify, "m", false, "minify generated code")
		testFlags.Parse(cmdArgs)

		os.Exit(handleError(func() error {
			pkgs := make([]*build.Package, testFlags.NArg())
			for i, pkgPath := range testFlags.Args() {
				pkgPath = filepath.ToSlash(pkgPath)
				var err error
				pkgs[i], err = gbuild.Import(pkgPath, 0, "js")
				if err != nil {
					return err
				}
			}
			if len(pkgs) == 0 {
				firstGopathWorkspace := filepath.SplitList(build.Default.GOPATH)[0] // TODO: Not sure if always picking first GOPATH workspace here is the right thing.
				srcDir, err := filepath.EvalSymlinks(filepath.Join(firstGopathWorkspace, "src"))
				if err != nil {
					return err
				}
				var pkg *build.Package
				if strings.HasPrefix(currentDirectory, srcDir) {
					pkgPath, err := filepath.Rel(srcDir, currentDirectory)
					if err != nil {
						return err
					}
					if pkg, err = gbuild.Import(pkgPath, 0, "js"); err != nil {
						return err
					}
				}
				if pkg == nil {
					if pkg, err = build.ImportDir(currentDirectory, 0); err != nil {
						return err
					}
					pkg.ImportPath = "_" + currentDirectory
				}
				pkgs = []*build.Package{pkg}
			}

			var exitErr error
			for _, buildPkg := range pkgs {
				if len(buildPkg.TestGoFiles) == 0 && len(buildPkg.XTestGoFiles) == 0 {
					fmt.Printf("?   \t%s\t[no test files]\n", buildPkg.ImportPath)
					continue
				}

				buildPkg.PkgObj = ""
				buildPkg.GoFiles = append(buildPkg.GoFiles, buildPkg.TestGoFiles...)
				pkg := &gbuild.PackageData{Package: buildPkg}

				s := gbuild.NewSession(options)
				if err := s.BuildPackage(pkg); err != nil {
					return err
				}

				tests := &testFuncs{Package: buildPkg}
				collectTests := func(pkg *gbuild.PackageData, testPkg string) bool {
					for _, name := range pkg.Archive.Tests {
						tests.Tests = append(tests.Tests, testFunc{Package: testPkg, Name: name})
					}
					return len(pkg.Archive.Tests) != 0
				}

				tests.NeedTest = collectTests(pkg, "_test")
				if len(pkg.XTestGoFiles) != 0 {
					testPkg := &gbuild.PackageData{Package: &build.Package{
						ImportPath: pkg.ImportPath + "_test",
						Dir:        pkg.Dir,
						GoFiles:    pkg.XTestGoFiles,
					}}
					if err := s.BuildPackage(testPkg); err != nil {
						return err
					}
					tests.NeedXtest = collectTests(testPkg, "_xtest")
				}

				buf := bytes.NewBuffer(nil)
				err := testmainTmpl.Execute(buf, tests)
				if err != nil {
					return err
				}

				fset := token.NewFileSet()
				mainFile, err := parser.ParseFile(fset, "_testmain.go", buf, 0)
				if err != nil {
					return err
				}

				mainPkg := &gbuild.PackageData{
					Package: &build.Package{
						Name:       "main",
						ImportPath: "main",
					},
				}
				mainPkg.Archive, err = compiler.Compile("main", []*ast.File{mainFile}, fset, s.ImportContext, options.Minify)
				if err != nil {
					return err
				}

				tempfile, err := ioutil.TempFile("", "test.")
				if err != nil {
					return err
				}
				defer func() {
					tempfile.Close()
					os.Remove(tempfile.Name())
				}()

				if err := s.WriteCommandPackage(mainPkg, tempfile.Name()); err != nil {
					return err
				}

				var args []string
				if *verbose {
					args = append(args, "-test.v")
				}
				if *short {
					args = append(args, "-test.short")
				}
				status := "ok  "
				start := time.Now()
				if err := runNode(tempfile.Name(), args, buildPkg.Dir); err != nil {
					if _, ok := err.(*exec.ExitError); !ok {
						return err
					}
					exitErr = err
					status = "FAIL"
				}
				fmt.Printf("%s\t%s\t%.3fs\n", status, buildPkg.ImportPath, time.Now().Sub(start).Seconds())
			}
			return exitErr
		}))

	case "tool":
		tool := cmdArgs[0]
		toolFlags := flag.NewFlagSet("tool command", flag.ExitOnError)
		toolFlags.Bool("e", false, "")
		toolFlags.Bool("l", false, "")
		toolFlags.Bool("m", false, "")
		toolFlags.String("o", "", "")
		toolFlags.String("D", "", "")
		toolFlags.String("I", "", "")
		toolFlags.Parse(flags.Args()[2:])

		os.Exit(handleError(func() error {
			if len(tool) == 2 {
				switch tool[1] {
				case 'g':
					basename := filepath.Base(toolFlags.Arg(0))
					s := gbuild.NewSession(options)
					if err := s.BuildFiles([]string{toolFlags.Arg(0)}, basename[:len(basename)-3]+".js", currentDirectory); err != nil {
						return err
					}
					return nil
				}
			}
			return fmt.Errorf("Tool not supported: " + tool)
		}))

	case "help", "":
		os.Stderr.WriteString(`GopherJS is a tool for compiling Go source code to JavaScript.

Usage:

    gopherjs command [arguments]

The commands are:

    build       compile packages and dependencies
    install     compile and install packages and dependencies
    run         compile and run Go program (requires Node.js)
    test        test packages (requires Node.js)

Use "go help [command]" for more information about a command.

`)

	default:
		fmt.Fprintf(os.Stderr, "gopherjs: unknown subcommand \"%s\"\nRun 'gopherjs help' for usage.\n", cmd)

	}
}
Example #2
0
func main() {
	flag.Parse()

	cmd := flag.Arg(0)
	switch cmd {
	case "build":
		buildFlags := flag.NewFlagSet("build", flag.ContinueOnError)
		var pkgObj string
		buildFlags.StringVar(&pkgObj, "o", "", "")
		verbose := buildFlags.Bool("v", false, "print the names of packages as they are compiled")
		watch := buildFlags.Bool("w", false, "watch for changes to the source files")
		buildFlags.Parse(flag.Args()[1:])

		for {
			s := NewSession(*verbose, *watch)

			exitCode := handleError(func() error {
				if buildFlags.NArg() == 0 {
					buildContext := &build.Context{
						GOROOT:   build.Default.GOROOT,
						GOPATH:   build.Default.GOPATH,
						GOOS:     build.Default.GOOS,
						GOARCH:   "js",
						Compiler: "gc",
					}
					if s.watcher != nil {
						s.watcher.Watch(currentDirectory)
					}
					buildPkg, err := buildContext.ImportDir(currentDirectory, 0)
					if err != nil {
						return err
					}
					pkg := &packageData{Package: buildPkg}
					pkg.ImportPath = currentDirectory
					if err := s.buildPackage(pkg); err != nil {
						return err
					}
					if pkgObj == "" {
						pkgObj = filepath.Base(currentDirectory) + ".js"
					}
					if err := s.writeCommandPackage(pkg, pkgObj); err != nil {
						return err
					}
					return nil
				}

				if strings.HasSuffix(buildFlags.Arg(0), ".go") {
					for _, arg := range buildFlags.Args() {
						if !strings.HasSuffix(arg, ".go") {
							return fmt.Errorf("named files must be .go files")
						}
					}
					if pkgObj == "" {
						basename := filepath.Base(buildFlags.Arg(0))
						pkgObj = basename[:len(basename)-3] + ".js"
					}
					names := make([]string, buildFlags.NArg())
					for i, name := range buildFlags.Args() {
						name = filepath.ToSlash(name)
						names[i] = name
						if s.watcher != nil {
							s.watcher.Watch(filepath.ToSlash(name))
						}
					}
					if err := s.buildFiles(buildFlags.Args(), pkgObj); err != nil {
						return err
					}
					return nil
				}

				for _, pkgPath := range buildFlags.Args() {
					pkgPath = filepath.ToSlash(pkgPath)
					if s.watcher != nil {
						s.watcher.Watch(pkgPath)
					}
					buildPkg, err := buildImport(pkgPath, 0)
					if err != nil {
						return err
					}
					pkg := &packageData{Package: buildPkg}
					if err := s.buildPackage(pkg); err != nil {
						return err
					}
					if pkgObj == "" {
						pkgObj = filepath.Base(buildFlags.Arg(0)) + ".js"
					}
					if err := s.writeCommandPackage(pkg, pkgObj); err != nil {
						return err
					}
				}
				return nil
			})

			if s.watcher == nil {
				os.Exit(exitCode)
			}
			s.waitForChange()
		}

	case "install":
		installFlags := flag.NewFlagSet("install", flag.ContinueOnError)
		verbose := installFlags.Bool("v", false, "print the names of packages as they are compiled")
		watch := installFlags.Bool("w", false, "watch for changes to the source files")
		installFlags.Parse(flag.Args()[1:])

		for {
			s := NewSession(*verbose, *watch)

			exitCode := handleError(func() error {
				pkgs := installFlags.Args()
				if len(pkgs) == 0 {
					srcDir, err := filepath.EvalSymlinks(filepath.Join(build.Default.GOPATH, "src"))
					if err != nil {
						return err
					}
					if !strings.HasPrefix(currentDirectory, srcDir) {
						return fmt.Errorf("gopherjs install: no install location for directory %s outside GOPATH", currentDirectory)
					}
					pkgPath, err := filepath.Rel(srcDir, currentDirectory)
					if err != nil {
						return err
					}
					pkgs = []string{pkgPath}
				}
				for _, pkgPath := range pkgs {
					pkgPath = filepath.ToSlash(pkgPath)
					if _, err := s.importPackage(pkgPath); err != nil {
						return err
					}
					pkg := s.packages[pkgPath]
					if err := s.writeCommandPackage(pkg, pkg.PkgObj); err != nil {
						return err
					}
				}
				return nil
			})

			if s.watcher == nil {
				os.Exit(exitCode)
			}
			s.waitForChange()
		}

	case "run":
		os.Exit(handleError(func() error {
			lastSourceArg := 1
			for {
				if !strings.HasSuffix(flag.Arg(lastSourceArg), ".go") {
					break
				}
				lastSourceArg++
			}
			if lastSourceArg == 1 {
				return fmt.Errorf("gopherjs run: no go files listed")
			}

			tempfile, err := ioutil.TempFile("", filepath.Base(flag.Arg(1))+".")
			if err != nil {
				return err
			}
			defer func() {
				tempfile.Close()
				os.Remove(tempfile.Name())
			}()

			s := NewSession(false, false)
			if err := s.buildFiles(flag.Args()[1:lastSourceArg], tempfile.Name()); err != nil {
				return err
			}
			if err := runNode(tempfile.Name(), flag.Args()[lastSourceArg:], ""); err != nil {
				return err
			}
			return nil
		}))

	case "test":
		testFlags := flag.NewFlagSet("test", flag.ContinueOnError)
		verbose := testFlags.Bool("v", false, "verbose")
		short := testFlags.Bool("short", false, "short")
		testFlags.Parse(flag.Args()[1:])

		os.Exit(handleError(func() error {
			pkgs := make([]*build.Package, testFlags.NArg())
			for i, pkgPath := range testFlags.Args() {
				pkgPath = filepath.ToSlash(pkgPath)
				var err error
				pkgs[i], err = buildImport(pkgPath, 0)
				if err != nil {
					return err
				}
			}
			if len(pkgs) == 0 {
				srcDir, err := filepath.EvalSymlinks(filepath.Join(build.Default.GOPATH, "src"))
				if err != nil {
					return err
				}
				var pkg *build.Package
				if strings.HasPrefix(currentDirectory, srcDir) {
					pkgPath, err := filepath.Rel(srcDir, currentDirectory)
					if err != nil {
						return err
					}
					if pkg, err = buildImport(pkgPath, 0); err != nil {
						return err
					}
				}
				if pkg == nil {
					if pkg, err = build.ImportDir(currentDirectory, 0); err != nil {
						return err
					}
					pkg.ImportPath = "_" + currentDirectory
				}
				pkgs = []*build.Package{pkg}
			}

			var exitErr error
			for _, buildPkg := range pkgs {
				if len(buildPkg.TestGoFiles) == 0 && len(buildPkg.XTestGoFiles) == 0 {
					fmt.Printf("?   \t%s\t[no test files]\n", buildPkg.ImportPath)
					continue
				}

				buildPkg.PkgObj = ""
				buildPkg.GoFiles = append(buildPkg.GoFiles, buildPkg.TestGoFiles...)
				pkg := &packageData{Package: buildPkg}
				s := NewSession(false, false)
				if err := s.buildPackage(pkg); err != nil {
					return err
				}

				mainPkg := &packageData{
					Package: &build.Package{
						Name:       "main",
						ImportPath: "main",
					},
					Archive: &translator.Archive{
						ImportPath: "main",
					},
				}
				s.packages["main"] = mainPkg
				s.t.NewEmptyTypesPackage("main")
				testingOutput, err := s.importPackage("testing")
				if err != nil {
					panic(err)
				}
				mainPkg.Archive.AddDependenciesOf(testingOutput)

				var mainFunc translator.Decl
				var names []string
				var tests []string
				collectTests := func(pkg *packageData) {
					for _, name := range pkg.Archive.Tests {
						names = append(names, name)
						tests = append(tests, fmt.Sprintf(`go$packages["%s"].%s`, pkg.ImportPath, name))
						mainFunc.DceDeps = append(mainFunc.DceDeps, translator.DepId(pkg.ImportPath+":"+name))
					}
					mainPkg.Archive.AddDependenciesOf(pkg.Archive)
				}

				collectTests(pkg)
				if len(pkg.XTestGoFiles) != 0 {
					testPkg := &packageData{Package: &build.Package{
						ImportPath: pkg.ImportPath + "_test",
						Dir:        pkg.Dir,
						GoFiles:    pkg.XTestGoFiles,
					}}
					if err := s.buildPackage(testPkg); err != nil {
						return err
					}
					collectTests(testPkg)
				}

				mainFunc.DceDeps = append(mainFunc.DceDeps, translator.DepId("flag:Parse"))
				mainFunc.BodyCode = []byte(fmt.Sprintf(`
				go$pkg.main = function() {
					var testing = go$packages["testing"];
					testing.Main2("%s", "%s", new (go$sliceType(Go$String))(["%s"]), new (go$sliceType(go$funcType([testing.T.Ptr], [], false)))([%s]));
				};
			`, pkg.ImportPath, pkg.Dir, strings.Join(names, `", "`), strings.Join(tests, ", ")))

				mainPkg.Archive.Declarations = []translator.Decl{mainFunc}
				mainPkg.Archive.AddDependency("main")

				tempfile, err := ioutil.TempFile("", "test.")
				if err != nil {
					return err
				}
				defer func() {
					tempfile.Close()
					os.Remove(tempfile.Name())
				}()

				if err := s.writeCommandPackage(mainPkg, tempfile.Name()); err != nil {
					return err
				}

				var args []string
				if *verbose {
					args = append(args, "-test.v")
				}
				if *short {
					args = append(args, "-test.short")
				}
				if err := runNode(tempfile.Name(), args, ""); err != nil {
					if _, ok := err.(*exec.ExitError); !ok {
						return err
					}
					exitErr = err
				}
			}
			return exitErr
		}))

	case "tool":
		tool := flag.Arg(1)
		toolFlags := flag.NewFlagSet("tool", flag.ContinueOnError)
		toolFlags.Bool("e", false, "")
		toolFlags.Bool("l", false, "")
		toolFlags.Bool("m", false, "")
		toolFlags.String("o", "", "")
		toolFlags.String("D", "", "")
		toolFlags.String("I", "", "")
		toolFlags.Parse(flag.Args()[2:])

		os.Exit(handleError(func() error {
			if len(tool) == 2 {
				switch tool[1] {
				case 'g':
					basename := filepath.Base(toolFlags.Arg(0))
					s := NewSession(false, false)
					if err := s.buildFiles([]string{toolFlags.Arg(0)}, basename[:len(basename)-3]+".js"); err != nil {
						return err
					}
					return nil
				}
			}
			return fmt.Errorf("Tool not supported: " + tool)
		}))

	case "help", "":
		os.Stderr.WriteString(`GopherJS is a tool for compiling Go source code to JavaScript.

Usage:

    gopherjs command [arguments]

The commands are:

    build       compile packages and dependencies
    install     compile and install packages and dependencies
    run         compile and run Go program (requires Node.js)
    test        test packages (requires Node.js)

`)

	default:
		fmt.Fprintf(os.Stderr, "gopherjs: unknown subcommand \"%s\"\nRun 'gopherjs help' for usage.\n", cmd)

	}
}
Example #3
0
func main() {
	options := &gbuild.Options{CreateMapFile: true}
	var pkgObj string

	pflag.BoolVarP(&options.Verbose, "verbose", "v", false, "print the names of packages as they are compiled")
	flagVerbose := pflag.Lookup("verbose")
	pflag.BoolVarP(&options.Watch, "watch", "w", false, "watch for changes to the source files")
	flagWatch := pflag.Lookup("watch")
	pflag.BoolVarP(&options.Minify, "minify", "m", false, "minify generated code")
	flagMinify := pflag.Lookup("minify")
	pflag.BoolVar(&options.Color, "color", terminal.IsTerminal(int(os.Stderr.Fd())) && os.Getenv("TERM") != "dumb", "colored output")
	flagColor := pflag.Lookup("color")
	tags := pflag.String("tags", "", "a list of build tags to consider satisfied during the build")
	flagTags := pflag.Lookup("tags")

	cmdBuild := &cobra.Command{
		Use:   "build [packages]",
		Short: "compile packages and dependencies",
	}
	cmdBuild.Flags().StringVarP(&pkgObj, "output", "o", "", "output file")
	cmdBuild.Flags().AddFlag(flagVerbose)
	cmdBuild.Flags().AddFlag(flagWatch)
	cmdBuild.Flags().AddFlag(flagMinify)
	cmdBuild.Flags().AddFlag(flagColor)
	cmdBuild.Flags().AddFlag(flagTags)
	cmdBuild.Run = func(cmd *cobra.Command, args []string) {
		options.BuildTags = strings.Fields(*tags)
		for {
			s := gbuild.NewSession(options)

			exitCode := handleError(func() error {
				if len(args) == 0 {
					return s.BuildDir(currentDirectory, currentDirectory, pkgObj)
				}

				if strings.HasSuffix(args[0], ".go") || strings.HasSuffix(args[0], ".inc.js") {
					for _, arg := range args {
						if !strings.HasSuffix(arg, ".go") && !strings.HasSuffix(arg, ".inc.js") {
							return fmt.Errorf("named files must be .go or .inc.js files")
						}
					}
					if pkgObj == "" {
						basename := filepath.Base(args[0])
						pkgObj = basename[:len(basename)-3] + ".js"
					}
					names := make([]string, len(args))
					for i, name := range args {
						name = filepath.ToSlash(name)
						names[i] = name
						if s.Watcher != nil {
							s.Watcher.Add(name)
						}
					}
					if err := s.BuildFiles(args, pkgObj, currentDirectory); err != nil {
						return err
					}
					return nil
				}

				for _, pkgPath := range args {
					pkgPath = filepath.ToSlash(pkgPath)
					if s.Watcher != nil {
						s.Watcher.Add(pkgPath)
					}
					buildPkg, err := gbuild.Import(pkgPath, 0, s.InstallSuffix(), options.BuildTags)
					if err != nil {
						return err
					}
					pkg := &gbuild.PackageData{Package: buildPkg}
					if err := s.BuildPackage(pkg); err != nil {
						return err
					}
					if pkgObj == "" {
						pkgObj = filepath.Base(args[0]) + ".js"
					}
					if err := s.WriteCommandPackage(pkg, pkgObj); err != nil {
						return err
					}
				}
				return nil
			}, options, nil)

			if s.Watcher == nil {
				os.Exit(exitCode)
			}
			s.WaitForChange()
		}
	}

	cmdInstall := &cobra.Command{
		Use:   "install [packages]",
		Short: "compile and install packages and dependencies",
	}
	cmdInstall.Flags().AddFlag(flagVerbose)
	cmdInstall.Flags().AddFlag(flagWatch)
	cmdInstall.Flags().AddFlag(flagMinify)
	cmdInstall.Flags().AddFlag(flagColor)
	cmdInstall.Flags().AddFlag(flagTags)
	cmdInstall.Run = func(cmd *cobra.Command, args []string) {
		options.BuildTags = strings.Fields(*tags)
		for {
			s := gbuild.NewSession(options)

			exitCode := handleError(func() error {
				pkgs := args
				if len(pkgs) == 0 {
					firstGopathWorkspace := filepath.SplitList(build.Default.GOPATH)[0] // TODO: The GOPATH workspace that contains the package source should be chosen.
					srcDir, err := filepath.EvalSymlinks(filepath.Join(firstGopathWorkspace, "src"))
					if err != nil {
						return err
					}
					if !strings.HasPrefix(currentDirectory, srcDir) {
						return fmt.Errorf("gopherjs install: no install location for directory %s outside GOPATH", currentDirectory)
					}
					pkgPath, err := filepath.Rel(srcDir, currentDirectory)
					if err != nil {
						return err
					}
					pkgs = []string{pkgPath}
				}
				if cmd.Name() == "get" {
					goGet := exec.Command("go", append([]string{"get", "-d"}, pkgs...)...)
					goGet.Stdout = os.Stdout
					goGet.Stderr = os.Stderr
					if err := goGet.Run(); err != nil {
						return err
					}
				}
				for _, pkgPath := range pkgs {
					pkgPath = filepath.ToSlash(pkgPath)
					if _, err := s.ImportPackage(pkgPath); err != nil {
						return err
					}
					pkg := s.Packages[pkgPath]
					if err := s.WriteCommandPackage(pkg, pkg.PkgObj); err != nil {
						return err
					}
				}
				return nil
			}, options, nil)

			if s.Watcher == nil {
				os.Exit(exitCode)
			}
			s.WaitForChange()
		}
	}

	cmdGet := &cobra.Command{
		Use:   "get [packages]",
		Short: "download and install packages and dependencies",
	}
	cmdGet.Flags().AddFlag(flagVerbose)
	cmdGet.Flags().AddFlag(flagWatch)
	cmdGet.Flags().AddFlag(flagMinify)
	cmdGet.Flags().AddFlag(flagColor)
	cmdGet.Flags().AddFlag(flagTags)
	cmdGet.Run = cmdInstall.Run

	cmdRun := &cobra.Command{
		Use:   "run [gofiles...] [arguments...]",
		Short: "compile and run Go program",
	}
	cmdRun.Run = func(cmd *cobra.Command, args []string) {
		os.Exit(handleError(func() error {
			lastSourceArg := 0
			for {
				if lastSourceArg == len(args) || !(strings.HasSuffix(args[lastSourceArg], ".go") || strings.HasSuffix(args[lastSourceArg], ".inc.js")) {
					break
				}
				lastSourceArg++
			}
			if lastSourceArg == 0 {
				return fmt.Errorf("gopherjs run: no go files listed")
			}

			tempfile, err := ioutil.TempFile("", filepath.Base(args[0])+".")
			if err != nil {
				return err
			}
			defer func() {
				tempfile.Close()
				os.Remove(tempfile.Name())
				os.Remove(tempfile.Name() + ".map")
			}()
			s := gbuild.NewSession(options)
			if err := s.BuildFiles(args[:lastSourceArg], tempfile.Name(), currentDirectory); err != nil {
				return err
			}
			if err := runNode(tempfile.Name(), args[lastSourceArg:], ""); err != nil {
				return err
			}
			return nil
		}, options, nil))
	}

	cmdTest := &cobra.Command{
		Use:   "test [packages]",
		Short: "test packages",
	}
	bench := cmdTest.Flags().String("bench", "", "Run benchmarks matching the regular expression. By default, no benchmarks run. To run all benchmarks, use '--bench=.'.")
	run := cmdTest.Flags().String("run", "", "Run only those tests and examples matching the regular expression.")
	short := cmdTest.Flags().Bool("short", false, "Tell long-running tests to shorten their run time.")
	verbose := cmdTest.Flags().BoolP("verbose", "v", false, "Log all tests as they are run. Also print all text from Log and Logf calls even if the test succeeds.")
	cmdTest.Flags().AddFlag(flagMinify)
	cmdTest.Flags().AddFlag(flagColor)
	cmdTest.Run = func(cmd *cobra.Command, args []string) {
		os.Exit(handleError(func() error {
			pkgs := make([]*build.Package, len(args))
			for i, pkgPath := range args {
				pkgPath = filepath.ToSlash(pkgPath)
				var err error
				pkgs[i], err = gbuild.Import(pkgPath, 0, "", nil)
				if err != nil {
					return err
				}
			}
			if len(pkgs) == 0 {
				firstGopathWorkspace := filepath.SplitList(build.Default.GOPATH)[0]
				srcDir, err := filepath.EvalSymlinks(filepath.Join(firstGopathWorkspace, "src"))
				if err != nil {
					return err
				}
				var pkg *build.Package
				if strings.HasPrefix(currentDirectory, srcDir) {
					pkgPath, err := filepath.Rel(srcDir, currentDirectory)
					if err != nil {
						return err
					}
					if pkg, err = gbuild.Import(pkgPath, 0, "", nil); err != nil {
						return err
					}
				}
				if pkg == nil {
					if pkg, err = build.ImportDir(currentDirectory, 0); err != nil {
						return err
					}
					pkg.ImportPath = "_" + currentDirectory
				}
				pkgs = []*build.Package{pkg}
			}

			var exitErr error
			for _, pkg := range pkgs {
				if len(pkg.TestGoFiles) == 0 && len(pkg.XTestGoFiles) == 0 {
					fmt.Printf("?   \t%s\t[no test files]\n", pkg.ImportPath)
					continue
				}

				s := gbuild.NewSession(options)
				tests := &testFuncs{Package: pkg}
				collectTests := func(buildPkg *build.Package, testPkgName string, needVar *bool) error {
					testPkg := &gbuild.PackageData{Package: buildPkg, IsTest: true}
					if err := s.BuildPackage(testPkg); err != nil {
						return err
					}

					for _, decl := range testPkg.Archive.Declarations {
						if strings.HasPrefix(decl.FullName, testPkg.ImportPath+".Test") {
							tests.Tests = append(tests.Tests, testFunc{Package: testPkgName, Name: decl.FullName[len(testPkg.ImportPath)+1:]})
							*needVar = true
						}
						if strings.HasPrefix(decl.FullName, testPkg.ImportPath+".Benchmark") {
							tests.Benchmarks = append(tests.Benchmarks, testFunc{Package: testPkgName, Name: decl.FullName[len(testPkg.ImportPath)+1:]})
							*needVar = true
						}
					}
					return nil
				}

				if err := collectTests(&build.Package{
					ImportPath: pkg.ImportPath,
					Dir:        pkg.Dir,
					GoFiles:    append(pkg.GoFiles, pkg.TestGoFiles...),
					Imports:    append(pkg.Imports, pkg.TestImports...),
				}, "_test", &tests.NeedTest); err != nil {
					return err
				}

				if err := collectTests(&build.Package{
					ImportPath: pkg.ImportPath + "_test",
					Dir:        pkg.Dir,
					GoFiles:    pkg.XTestGoFiles,
					Imports:    pkg.XTestImports,
				}, "_xtest", &tests.NeedXtest); err != nil {
					return err
				}

				buf := bytes.NewBuffer(nil)
				if err := testmainTmpl.Execute(buf, tests); err != nil {
					return err
				}

				fset := token.NewFileSet()
				mainFile, err := parser.ParseFile(fset, "_testmain.go", buf, 0)
				if err != nil {
					return err
				}

				mainPkg := &gbuild.PackageData{
					Package: &build.Package{
						Name:       "main",
						ImportPath: "main",
					},
				}
				mainPkg.Archive, err = compiler.Compile("main", []*ast.File{mainFile}, fset, s.ImportContext, options.Minify)
				if err != nil {
					return err
				}

				tempfile, err := ioutil.TempFile("", "test.")
				if err != nil {
					return err
				}
				defer func() {
					tempfile.Close()
					os.Remove(tempfile.Name())
					os.Remove(tempfile.Name() + ".map")
				}()

				if err := s.WriteCommandPackage(mainPkg, tempfile.Name()); err != nil {
					return err
				}

				var args []string
				if *bench != "" {
					args = append(args, "-test.bench", *bench)
				}
				if *run != "" {
					args = append(args, "-test.run", *run)
				}
				if *short {
					args = append(args, "-test.short")
				}
				if *verbose {
					args = append(args, "-test.v")
				}
				status := "ok  "
				start := time.Now()
				if err := runNode(tempfile.Name(), args, pkg.Dir); err != nil {
					if _, ok := err.(*exec.ExitError); !ok {
						return err
					}
					exitErr = err
					status = "FAIL"
				}
				fmt.Printf("%s\t%s\t%.3fs\n", status, pkg.ImportPath, time.Now().Sub(start).Seconds())
			}
			return exitErr
		}, options, nil))
	}

	cmdTool := &cobra.Command{
		Use:   "tool [command] [args...]",
		Short: "run specified go tool",
	}
	cmdTool.Flags().BoolP("e", "e", false, "")
	cmdTool.Flags().BoolP("l", "l", false, "")
	cmdTool.Flags().BoolP("m", "m", false, "")
	cmdTool.Flags().StringP("o", "o", "", "")
	cmdTool.Flags().StringP("D", "D", "", "")
	cmdTool.Flags().StringP("I", "I", "", "")
	cmdTool.Run = func(cmd *cobra.Command, args []string) {
		os.Exit(handleError(func() error {
			if len(args) == 2 {
				switch args[0][1] {
				case 'g':
					basename := filepath.Base(args[1])
					s := gbuild.NewSession(options)
					if err := s.BuildFiles([]string{args[1]}, basename[:len(basename)-3]+".js", currentDirectory); err != nil {
						return err
					}
					return nil
				}
			}
			cmdTool.Help()
			return nil
		}, options, nil))
	}

	cmdServe := &cobra.Command{
		Use:   "serve",
		Short: "compile on-the-fly and serve",
	}
	cmdServe.Flags().AddFlag(flagVerbose)
	cmdServe.Flags().AddFlag(flagMinify)
	cmdServe.Flags().AddFlag(flagColor)
	cmdServe.Flags().AddFlag(flagTags)
	var port int
	cmdServe.Flags().IntVarP(&port, "port", "p", 8080, "HTTP port")
	cmdServe.Run = func(cmd *cobra.Command, args []string) {
		options.BuildTags = strings.Fields(*tags)
		dirs := append(filepath.SplitList(build.Default.GOPATH), build.Default.GOROOT)
		sourceFiles := http.FileServer(serveCommandFileSystem{options: options, dirs: dirs, sourceMaps: make(map[string][]byte)})
		fmt.Printf("serving at http://localhost:%d\n", port)
		fmt.Println(http.ListenAndServe(fmt.Sprintf(":%d", port), sourceFiles))
	}

	rootCmd := &cobra.Command{
		Use:  "gopherjs",
		Long: "GopherJS is a tool for compiling Go source code to JavaScript.",
	}
	rootCmd.AddCommand(cmdBuild, cmdGet, cmdInstall, cmdRun, cmdTest, cmdTool, cmdServe)
	rootCmd.Execute()
}