Golang colors.Red函数代码示例

// SetupVCS configures the VCS depending on the type
func (d *Dependency) SetupVCS(name string) (err error) {
	switch d.Type {
	case TypeGitClone:
		if d.Alias == "" {
			util.PrintIndent(colors.Red("Error: Dependency " + name + ": Repo '" + d.Repo + "' Type '" + d.Type + "' requires 'alias' field"))
			err = ErrMissingAlias
			return
		}

		d.VCS = new(Git)
	case TypeGit:
		d.VCS = new(Git)
	case TypeBzr:
		d.VCS = new(Bzr)
	case TypeHg:
		d.VCS = new(Hg)
	default:
		util.PrintIndent(colors.Red(d.Repo + ": Unknown repository type (" + d.Type + "), skipping..."))
		util.PrintIndent(colors.Red("Valid Repository types: " + TypeGit + ", " + TypeHg + ", " + TypeBzr + ", " + TypeGitClone))
		err = ErrUnknownType
	}

	if d.Type != TypeGitClone && d.Alias != "" {
		util.Print(colors.Yellow("Warning: " + d.Repo + ": 'alias' field only allowed in dependencies with type 'git-clone', skipping..."))
		d.Alias = ""
	}

	return
}

//GetHead - Render a revspec to a commit ID
func (g *Git) GetHead(d *Dependency) (hash string, err error) {
	var pwd string

	pwd = util.Pwd()
	util.Cd(d.Path())

	c := exec.Command("git", "rev-parse", d.Version)
	{
		var out_bytes []byte
		out_bytes, err = c.CombinedOutput()
		hash = strings.TrimSuffix(string(out_bytes), "\n")
	}

	util.Cd(pwd)

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("git rev-parse " + d.Version))
		util.PrintIndent(colors.Red(string(hash)))
		util.PrintIndent(colors.Red(err.Error()))
		util.Fatal("")
	}

	return
}

// IsBranch determines if a version (branch, commit hash, tag) is a branch (i.e. can we pull from the remote).
// Assumes we are already in a sub directory of the repo
func (g *Git) isBranch(name string) (result bool) {
	c := exec.Command("git", "branch", "-r")
	out, err := c.CombinedOutput()

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("git branch -r"))
		util.PrintIndent(colors.Red(string(out)))
		util.PrintIndent(colors.Red(err.Error()))
		return false
	}

	// get the string version but also strip the trailing newline
	stringOut := string(out[0 : len(out)-1])

	lines := strings.Split(stringOut, "\n")
	for _, val := range lines {
		// for "origin/HEAD -> origin/master"
		arr := strings.Split(val, " -> ")
		remoteBranch := arr[0]

		// for normal "origin/develop"
		arr = strings.Split(remoteBranch, "/")
		branch := arr[1]
		if branch == name {
			return true
		}
	}

	return
}

// Pwd returns the current working directory
func Pwd() (pwd string) {
	pwd, err := os.Getwd()
	if err != nil {
		logger.Print(colors.Red("Cannot get Current Working Directory"))
		Fatal(colors.Red(err.Error()))
	}
	return
}

// Change directory to the specified directory, checking for errors
// Returns the path to the old working directory
func defaultCd(dir string) (err error) {
	err = os.Chdir(dir)

	if err != nil {
		result.RegisterError()
		logger.Output(2, indent()+colors.Red("$ cd "+dir))
		logger.Output(2, indent()+colors.Red(err.Error()))
	} else if verbose {
		logger.Output(2, indent()+"$ cd "+dir)
	}
	return
}

// Create writes an empty deps.json at the location specified by path
func Create(path string) {
	if util.Exists(path) {
		util.Fatal(colors.Red(dep.DepsFile + " already exists!"))
	}
	util.Print(colors.Blue("Initializing:"))
	err := ioutil.WriteFile(path, []byte(template), 0644)
	if err == nil {
		util.Print("Empty " + dep.DepsFile + " created (" + path + ")")
	} else {
		util.Fatal(colors.Red("Error creating "+dep.DepsFile+": "), err)
	}
	return
}

// Check for duplicate dependency
// if same name and same version, skip
// if same name and different version, exit
// if different name, add to set, don't skip
func duplicate(d dep.Dependency, set map[string]string) (skip bool) {
	version, installed := set[d.Repo]
	if installed && version != d.Version {
		util.Print(colors.Red("ERROR    : Duplicate dependency with different versions detected"))
		util.Print(colors.Red("Repo     : " + d.Repo))
		util.Fatal(colors.Red("Versions : " + d.Version + "\t" + version))
	} else if installed {
		util.VerboseIndent(colors.Yellow("Skipping previously installed dependency: ") + d.Repo)
		skip = true
	} else {
		set[d.Repo] = d.Version
	}
	return
}

// LastCommit retrieves the version number of the last commit on branch
// Assumes that the current working directory is in the hg repo
func (h *Hg) LastCommit(d *Dependency, branch string) (hash string, err error) {
	c := exec.Command("hg", "log", "--template='{node}\n'", "--limit=1")
	out, err := c.CombinedOutput()

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("hg log --template='{node}\n' --limit=1"))
		util.PrintIndent(colors.Red(string(out)))
		util.PrintIndent(colors.Red(err.Error()))
		util.Fatal("")
	}

	hash = strings.Replace(string(out), "\n", "", -1)
	return
}

// LastCommit retrieves the version number of the last commit on branch
// Assumes that the current working directory is in the bzr repo
func (b *Bzr) LastCommit(d *Dependency, branch string) (hash string, err error) {
	c := exec.Command("bzr", "log", "--line")
	out, err := c.CombinedOutput()

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("bzr log --line"))
		util.PrintIndent(colors.Red(string(out)))
		util.PrintIndent(colors.Red(err.Error()))
		util.Fatal("")
	}

	hash = strings.Split(string(out), ":")[0]
	return
}

//Read - get top-level frozen dependencies
func Read(deps dep.DependencyMap) (result string) {
	var err error
	var resultMap = make(map[string]*dep.Dependency)

	util.Print(colors.Yellow("NOTE: This will not reflect the state of the remote unless you have just run `depman install`."))

	for k, v := range deps.Map {
		if v.Type == dep.TypeGitClone && v.Alias == "" {
			util.PrintIndent(colors.Red("Error: Repo '" + k + "' Type '" + v.Type + "' requires 'alias' field (defined in " + deps.Path + ")"))
			continue
		}

		v.Version, err = v.VCS.GetHead(v)
		if err != nil {
			util.Fatal(err)
		}

		resultMap[k] = v
	}

	//not changing the logic in the loop because we might want to change the print format later
	for _, v := range resultMap {
		result += fmt.Sprintf("%s %s\n", v.Repo, v.Version)
	}

	return
}

// Add interactively prompts the user for details of a dependency, adds it to deps.json, and writes out the file
func Add(deps dep.DependencyMap, name string) {
	var cont = true
	_, exists := deps.Map[name]
	if exists {
		util.Fatal(colors.Red("Dependency '" + name + "'' is already defined, pick another name."))
	}

	util.Print(colors.Blue("Adding: ") + name)

	for cont {
		d := new(dep.Dependency)
		d.Type = promptType("Type", "git, git-clone, hg, bzr")
		if d.Type == dep.TypeGitClone {
			d.Repo = promptString("Repo", "git url")
		} else {
			d.Repo = promptString("Repo", "go import")
		}
		d.Version = promptString("Version", "hash, branch, or tag")
		if d.Type == dep.TypeGitClone {
			d.Alias = promptString("Alias", "where to install the repo")
		}
		deps.Map[name] = d
		cont = promptBool("Add another", "y/N")
	}

	for name, d := range deps.Map {
		err := d.SetupVCS(name)
		if err != nil {
			delete(deps.Map, name)
		}

	}

	err := deps.Write()
	if err != nil {
		util.Fatal(colors.Red("Error Writing " + deps.Path + ": " + err.Error()))
	}

	install.Install(deps)

	return
}

//GetHead - Render a revspec to a commit ID
func (b *Bzr) GetHead(d *Dependency) (hash string, err error) {
	var pwd string

	pwd = util.Pwd()
	util.Cd(d.Path())
	defer util.Cd(pwd)

	out, err := exec.Command("bzr", "revno", d.Version).CombinedOutput()
	hash = strings.TrimSuffix(string(out), "\n")

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("bzr revno " + d.Version))
		util.PrintIndent(colors.Red(hash))
		util.PrintIndent(colors.Red(err.Error()))
		util.Fatal("")
	}

	return
}

//GetHead - Render a revspec to a commit ID
func (h *Hg) GetHead(d *Dependency) (hash string, err error) {
	var pwd string

	pwd = util.Pwd()
	util.Cd(d.Path())
	defer util.Cd(pwd)

	out, err := exec.Command("hg", "id", "-i").CombinedOutput()
	hash = strings.TrimSuffix(string(out), "\n")

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("hg id -i"))
		util.PrintIndent(colors.Red(hash))
		util.PrintIndent(colors.Red(err.Error()))
		util.Fatal("")
	}

	return
}

// LastCommit retrieves the version number of the last commit on branch
// Assumes that the current working directory is in the git repo
func (g *Git) LastCommit(d *Dependency, branch string) (hash string, err error) {
	if !g.isBranch(branch) {
		err = errors.New("Branch '" + branch + "' is not a valid branch")
		return
	}

	c := exec.Command("git", "log", "-1", "--format=%H")
	out, err := c.CombinedOutput()

	if err != nil {
		util.Print("pwd: " + util.Pwd())
		util.PrintIndent(colors.Red("git log -1 --format=%H"))
		util.PrintIndent(colors.Red(string(out)))
		util.PrintIndent(colors.Red(err.Error()))
		util.Fatal("")
	}

	hash = strings.Replace(string(out), "\n", "", -1)
	return
}

// Prompt the user with question check that the answer is a valid dep type and then return it
func promptType(question string, details string) (t string) {
	for {
		t = promptString(question, details)
		t = strings.TrimSpace(t)
		switch t {
		case dep.TypeBzr, dep.TypeGit, dep.TypeHg, dep.TypeGitClone:
			return
		default:
			util.Print(colors.Red("Invalid Type, try again..."))
		}
	}
}