added default configuration for common vcs

cmd/app.go

		Stdin:     os.Stdin,
		Stderr:    os.Stderr,
		Stdout:    os.Stdout,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
}
// Run the application
func (a *App) Run() error {
	ConfigureEnvironment()
	if len(a.Args) < 1 {
		a.Args = append(a.Args, "help")
	}
	executed := false
	for _, s := range getVersionControlSystems() {
	for _, s := range GetVersionControlSystems() {
		// Determine if the directory is version controlled (skip if it is not)
		err := isVersionControlled(s, a.Directory)
		if err != nil {
}
// Get the working directory
func getWorkingDirectory() string {
func GetWorkingDirectory() string {
	d, _ := os.Getwd()
	return d
}
// Extract an array of version control systems available on the system
func getVersionControlSystems() []string {
func GetVersionControlSystems() []string {
	return strings.Split(os.Getenv("CODE_VCS"), ";")
}
func ConfigureEnvironment() {
	systems := GetVersionControlSystems()
	env := os.Getenv("CODE_VCS")
	if env == "" {
		os.Setenv("CODE_VCS", "git;hg;tf;bzr")
	}
	// Configure VCS checking
	for _, vcs := range systems {
		key := fmt.Sprintf("CODE_%s_CHECK", strings.ToUpper(vcs))
		env = os.Getenv(key)
		// Temporarily define the subcommand `incoming` for known version control systems
		if env == "" {
			incoming := ""
			switch vcs {
			case "git":
				incoming = "branch"
				break
			case "hg":
				incoming = "branch"
				break
			case "bzr":
				incoming = "root"
				break
			case "tf":
				incoming = "branches ."
				break
			}
			if incoming != "" {
				os.Setenv(key, incoming)
			}
		}
	}
	// Configure VCS incoming
	for _, vcs := range systems {
		key := fmt.Sprintf("CODE_%s_INCOMING", strings.ToUpper(vcs))
		env = os.Getenv(key)
		// Temporarily define the subcommand `incoming` for known version control systems
		if env == "" {
			incoming := ""
			switch vcs {
			case "git":
				incoming = "log ..@{u}"
				break
			case "hg":
				incoming = "incoming"
				break
			case "bzr":
				incoming = "missing"
				break
			case "tf":
				incoming = "history -r -stopafter:1 -version:W~T ."
				break
			}
			if incoming != "" {
				os.Setenv(key, incoming)
			}
		}
	}
}
// Determine if the directory is part of the version control system
func isVersionControlled(vcs, directory string) error {
	env := os.Getenv(fmt.Sprintf("CODE_%s_CHECK", strings.ToUpper(vcs)))

cmd/app_test.go

		Stdin:     &buffer,
		Stderr:    &buffer,
		Stdout:    &buffer,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
	err := app.Run()
		Stdin:     &buffer,
		Stderr:    &buffer,
		Stdout:    &buffer,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
	err := app.Run()
		Stdin:     &buffer,
		Stderr:    &buffer,
		Stdout:    &buffer,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
	err := app.Run()
	if err == nil {
	if err != nil {
		t.FailNow()
	}
}
		Stdin:     &buffer,
		Stderr:    &buffer,
		Stdout:    &buffer,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
	err := app.Run()
		Stdin:     &buffer,
		Stderr:    &buffer,
		Stdout:    &buffer,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
	err := app.Run()
		Stdin:     &buffer,
		Stderr:    &buffer,
		Stdout:    &buffer,
		Directory: getWorkingDirectory(),
		Directory: GetWorkingDirectory(),
	}
	err := app.Run()