1 files changed, 326 insertions, 0 deletions
diff --git a/vendor/github.com/chzyer/readline/readline.go b/vendor/github.com/chzyer/readline/readline.go
new file mode 100644
index 000000000..0e7aca06d
--- /dev/null
+++ b/vendor/github.com/chzyer/readline/readline.go
@@ -0,0 +1,326 @@
+// Readline is a pure go implementation for GNU-Readline kind library.
+//
+// example:
+// 	rl, err := readline.New("> ")
+// 	if err != nil {
+// 		panic(err)
+// 	}
+// 	defer rl.Close()
+//
+// 	for {
+// 		line, err := rl.Readline()
+// 		if err != nil { // io.EOF
+// 			break
+// 		}
+// 		println(line)
+// 	}
+//
+package readline
+
+import "io"
+
+type Instance struct {
+	Config    *Config
+	Terminal  *Terminal
+	Operation *Operation
+}
+
+type Config struct {
+	// prompt supports ANSI escape sequence, so we can color some characters even in windows
+	Prompt string
+
+	// readline will persist historys to file where HistoryFile specified
+	HistoryFile string
+	// specify the max length of historys, it's 500 by default, set it to -1 to disable history
+	HistoryLimit           int
+	DisableAutoSaveHistory bool
+	// enable case-insensitive history searching
+	HistorySearchFold bool
+
+	// AutoCompleter will called once user press TAB
+	AutoComplete AutoCompleter
+
+	// Any key press will pass to Listener
+	// NOTE: Listener will be triggered by (nil, 0, 0) immediately
+	Listener Listener
+
+	Painter Painter
+
+	// If VimMode is true, readline will in vim.insert mode by default
+	VimMode bool
+
+	InterruptPrompt string
+	EOFPrompt       string
+
+	FuncGetWidth func() int
+
+	Stdin       io.ReadCloser
+	StdinWriter io.Writer
+	Stdout      io.Writer
+	Stderr      io.Writer
+
+	EnableMask bool
+	MaskRune   rune
+
+	// erase the editing line after user submited it
+	// it use in IM usually.
+	UniqueEditLine bool
+
+	// filter input runes (may be used to disable CtrlZ or for translating some keys to different actions)
+	// -> output = new (translated) rune and true/false if continue with processing this one
+	FuncFilterInputRune func(rune) (rune, bool)
+
+	// force use interactive even stdout is not a tty
+	FuncIsTerminal      func() bool
+	FuncMakeRaw         func() error
+	FuncExitRaw         func() error
+	FuncOnWidthChanged  func(func())
+	ForceUseInteractive bool
+
+	// private fields
+	inited    bool
+	opHistory *opHistory
+	opSearch  *opSearch
+}
+
+func (c *Config) useInteractive() bool {
+	if c.ForceUseInteractive {
+		return true
+	}
+	return c.FuncIsTerminal()
+}
+
+func (c *Config) Init() error {
+	if c.inited {
+		return nil
+	}
+	c.inited = true
+	if c.Stdin == nil {
+		c.Stdin = NewCancelableStdin(Stdin)
+	}
+
+	c.Stdin, c.StdinWriter = NewFillableStdin(c.Stdin)
+
+	if c.Stdout == nil {
+		c.Stdout = Stdout
+	}
+	if c.Stderr == nil {
+		c.Stderr = Stderr
+	}
+	if c.HistoryLimit == 0 {
+		c.HistoryLimit = 500
+	}
+
+	if c.InterruptPrompt == "" {
+		c.InterruptPrompt = "^C"
+	} else if c.InterruptPrompt == "\n" {
+		c.InterruptPrompt = ""
+	}
+	if c.EOFPrompt == "" {
+		c.EOFPrompt = "^D"
+	} else if c.EOFPrompt == "\n" {
+		c.EOFPrompt = ""
+	}
+
+	if c.AutoComplete == nil {
+		c.AutoComplete = &TabCompleter{}
+	}
+	if c.FuncGetWidth == nil {
+		c.FuncGetWidth = GetScreenWidth
+	}
+	if c.FuncIsTerminal == nil {
+		c.FuncIsTerminal = DefaultIsTerminal
+	}
+	rm := new(RawMode)
+	if c.FuncMakeRaw == nil {
+		c.FuncMakeRaw = rm.Enter
+	}
+	if c.FuncExitRaw == nil {
+		c.FuncExitRaw = rm.Exit
+	}
+	if c.FuncOnWidthChanged == nil {
+		c.FuncOnWidthChanged = DefaultOnWidthChanged
+	}
+
+	return nil
+}
+
+func (c Config) Clone() *Config {
+	c.opHistory = nil
+	c.opSearch = nil
+	return &c
+}
+
+func (c *Config) SetListener(f func(line []rune, pos int, key rune) (newLine []rune, newPos int, ok bool)) {
+	c.Listener = FuncListener(f)
+}
+
+func (c *Config) SetPainter(p Painter) {
+	c.Painter = p
+}
+
+func NewEx(cfg *Config) (*Instance, error) {
+	t, err := NewTerminal(cfg)
+	if err != nil {
+		return nil, err
+	}
+	rl := t.Readline()
+	if cfg.Painter == nil {
+		cfg.Painter = &defaultPainter{}
+	}
+	return &Instance{
+		Config:    cfg,
+		Terminal:  t,
+		Operation: rl,
+	}, nil
+}
+
+func New(prompt string) (*Instance, error) {
+	return NewEx(&Config{Prompt: prompt})
+}
+
+func (i *Instance) ResetHistory() {
+	i.Operation.ResetHistory()
+}
+
+func (i *Instance) SetPrompt(s string) {
+	i.Operation.SetPrompt(s)
+}
+
+func (i *Instance) SetMaskRune(r rune) {
+	i.Operation.SetMaskRune(r)
+}
+
+// change history persistence in runtime
+func (i *Instance) SetHistoryPath(p string) {
+	i.Operation.SetHistoryPath(p)
+}
+
+// readline will refresh automatic when write through Stdout()
+func (i *Instance) Stdout() io.Writer {
+	return i.Operation.Stdout()
+}
+
+// readline will refresh automatic when write through Stdout()
+func (i *Instance) Stderr() io.Writer {
+	return i.Operation.Stderr()
+}
+
+// switch VimMode in runtime
+func (i *Instance) SetVimMode(on bool) {
+	i.Operation.SetVimMode(on)
+}
+
+func (i *Instance) IsVimMode() bool {
+	return i.Operation.IsEnableVimMode()
+}
+
+func (i *Instance) GenPasswordConfig() *Config {
+	return i.Operation.GenPasswordConfig()
+}
+
+// we can generate a config by `i.GenPasswordConfig()`
+func (i *Instance) ReadPasswordWithConfig(cfg *Config) ([]byte, error) {
+	return i.Operation.PasswordWithConfig(cfg)
+}
+
+func (i *Instance) ReadPasswordEx(prompt string, l Listener) ([]byte, error) {
+	return i.Operation.PasswordEx(prompt, l)
+}
+
+func (i *Instance) ReadPassword(prompt string) ([]byte, error) {
+	return i.Operation.Password(prompt)
+}
+
+type Result struct {
+	Line  string
+	Error error
+}
+
+func (l *Result) CanContinue() bool {
+	return len(l.Line) != 0 && l.Error == ErrInterrupt
+}
+
+func (l *Result) CanBreak() bool {
+	return !l.CanContinue() && l.Error != nil
+}
+
+func (i *Instance) Line() *Result {
+	ret, err := i.Readline()
+	return &Result{ret, err}
+}
+
+// err is one of (nil, io.EOF, readline.ErrInterrupt)
+func (i *Instance) Readline() (string, error) {
+	return i.Operation.String()
+}
+
+func (i *Instance) ReadlineWithDefault(what string) (string, error) {
+	i.Operation.SetBuffer(what)
+	return i.Operation.String()
+}
+
+func (i *Instance) SaveHistory(content string) error {
+	return i.Operation.SaveHistory(content)
+}
+
+// same as readline
+func (i *Instance) ReadSlice() ([]byte, error) {
+	return i.Operation.Slice()
+}
+
+// we must make sure that call Close() before process exit.
+func (i *Instance) Close() error {
+	if err := i.Terminal.Close(); err != nil {
+		return err
+	}
+	i.Config.Stdin.Close()
+	i.Operation.Close()
+	return nil
+}
+func (i *Instance) Clean() {
+	i.Operation.Clean()
+}
+
+func (i *Instance) Write(b []byte) (int, error) {
+	return i.Stdout().Write(b)
+}
+
+// WriteStdin prefill the next Stdin fetch
+// Next time you call ReadLine() this value will be writen before the user input
+// ie :
+//  i := readline.New()
+//  i.WriteStdin([]byte("test"))
+//  _, _= i.Readline()
+//
+// gives
+//
+// > test[cursor]
+func (i *Instance) WriteStdin(val []byte) (int, error) {
+	return i.Terminal.WriteStdin(val)
+}
+
+func (i *Instance) SetConfig(cfg *Config) *Config {
+	if i.Config == cfg {
+		return cfg
+	}
+	old := i.Config
+	i.Config = cfg
+	i.Operation.SetConfig(cfg)
+	i.Terminal.SetConfig(cfg)
+	return old
+}
+
+func (i *Instance) Refresh() {
+	i.Operation.Refresh()
+}
+
+// HistoryDisable the save of the commands into the history
+func (i *Instance) HistoryDisable() {
+	i.Operation.history.Disable()
+}
+
+// HistoryEnable the save of the commands into the history (default on)
+func (i *Instance) HistoryEnable() {
+	i.Operation.history.Enable()
+}