README

GCli

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A simple to use command line application, written using golang.

Since v2.3.0, option binding and argument binding have been reconstructed, which may be incompatible with the previous ones.

中文说明

中文说明请看 README.zh-CN

Screenshots

app-cmd-list

Features

  • Simple to use
  • Support for adding multiple commands and supporting command aliases
  • option/flag Support option binding --long, support for adding short options(-s)
    • POSIX-style short flag combining (-a -b = -ab)
    • Support setting Required, indicating a required option parameter
    • Support setting Validator, which can customize the validation input parameters
  • argument Support binding argument to specify name
    • Support required, optional, array settings
    • It will be automatically detected and collected when the command is run.
  • Supports rich color output. provide by gookit/color
    • Supports html tab-style color rendering, compatible with Windows
    • Built-in info, error, success, danger and other styles, can be used directly
  • interact Built-in user interaction methods: ReadLine, Confirm, Select, MultiSelect ...
  • progress Built-in progress display methods: Txt, Bar, Loading, RoundTrip, DynamicText ...
  • Automatically generate command help information and support color display
  • When the command entered is incorrect, a similar command will be prompted(including an alias prompt)
  • Supports generation of zsh and bash command completion script files
  • Supports a single command as a stand-alone application

GoDoc

Install

go get github.com/gookit/gcli/v2

Quick start

package main

import (
    "runtime"
    "github.com/gookit/gcli/v2"
    "github.com/gookit/gcli/v2/_examples/cmd"
)

// for test run: go build ./_examples/cliapp.go && ./cliapp
func main() {
    app := gcli.NewApp()
    app.Version = "1.0.3"
    app.Description = "this is my cli application"
    // app.SetVerbose(gcli.VerbDebug)

    app.Add(cmd.ExampleCommand())
    app.Add(&gcli.Command{
        Name: "demo",
        // allow color tag and {$cmd} will be replace to 'demo'
        UseFor: "this is a description <info>message</> for {$cmd}", 
        Aliases: []string{"dm"},
        Func: func (cmd *gcli.Command, args []string) error {
            gcli.Print("hello, in the demo command\n")
            return 0
        },
    })

    // .... add more ...

    app.Run()
}
Usage
  • build a demo package
% go build ./_examples/cliapp.go                                                           
Display version
% ./cliapp --version      
# or use -V                                                 
% ./cliapp -V                                                     

app-version

Display app help

by ./cliapp or ./cliapp -h or ./cliapp --help

Examples:

./cliapp
./cliapp -h # can also
./cliapp --help # can also

cmd-list

Run Command
./cliapp COMMAND [--OPTION VALUE -S VALUE ...] [ARGUMENT0 ARGUMENT1 ...]
% ./cliapp example -c some.txt -d ./dir --id 34 -n tom -n john val0 val1 val2 arrVal0 arrVal1 arrVal2

you can see:

run-example

Display Command Help

by ./cliapp example -h or ./cliapp example --help

cmd-help

Error Command Tips

command tips

Generate Auto Completion Scripts

import  "github.com/gookit/gcli/v2/builtin"

    // ...
    // add gen command(gen successful you can remove it)
    app.Add(builtin.GenAutoComplete())

Build and run command(This command can be deleted after success.):

% go build ./_examples/cliapp.go && ./cliapp genac -h // display help
% go build ./_examples/cliapp.go && ./cliapp genac // run gen command

will see:

INFO: 
  {shell:zsh binName:cliapp output:auto-completion.zsh}

Now, will write content to file auto-completion.zsh
Continue? [yes|no](default yes): y

OK, auto-complete file generate successful

After running, it will generate an auto-completion.{zsh|bash} file in the current directory, and the shell environment name is automatically obtained. Of course you can specify it manually at runtime

Generated shell script file ref:

Preview:

auto-complete-tips

Write a command

Quick add
app.Add(&gcli.Command{
    Name: "demo",
    // allow color tag and {$cmd} will be replace to 'demo'
    UseFor: "this is a description <info>message</> for command {$cmd}", 
    Aliases: []string{"dm"},
    Func: func (cmd *gcli.Command, args []string) error {
        gcli.Print("hello, in the demo command\n")
        return nil
    },
})
Write go file

the source file at: example.go

package cmd

import (
	"fmt"

	"github.com/gookit/color"
	"github.com/gookit/gcli/v2"
)

// options for the command
var exampleOpts = struct {
	id  int
	c   string
	dir string
	opt string
	names gcli.Strings
}{}

// ExampleCommand command definition
var ExampleCommand = &gcli.Command{
	Name:        "example",
	UseFor: "this is a description message",
	Aliases:     []string{"exp", "ex"}, // 命令别名
	// {$binName} {$cmd} is help vars. '{$cmd}' will replace to 'example'
	Examples: `{$binName} {$cmd} --id 12 -c val ag0 ag1
<cyan>{$fullCmd} --names tom --names john -n c</> test use special option`,
	Config: func(c *gcli.Command) {
		// 绑定命令选项信息
		c.IntOpt(&exampleOpts.id, "id", "", 2, "the id option")
		c.StrOpt(&exampleOpts.c, "config", "c", "value", "the config option")
		// notice `DIRECTORY` will replace to option value type
		c.StrOpt(&exampleOpts.dir, "dir", "d", "", "the `DIRECTORY` option")
		// 支持设置选项短名称
		c.StrOpt(&exampleOpts.opt, "opt", "o", "", "the option message")
		// 支持绑定自定义变量, 但必须实现 flag.Value 接口
		c.VarOpt(&exampleOpts.names, "names", "n", "the option message")

		// 绑定命令参数信息,按参数位置绑定
		c.AddArg("arg0", "the first argument, is required", true)
		c.AddArg("arg1", "the second argument, is required", true)
		c.AddArg("arg2", "the optional argument, is optional")
		c.AddArg("arrArg", "the array argument, is array", false, true)
	},
	Func:  exampleExecute,
}

// 命令执行主逻辑代码
// example run:
// 	go run ./_examples/cliapp.go ex -c some.txt -d ./dir --id 34 -n tom -n john val0 val1 val2 arrVal0 arrVal1 arrVal2
func exampleExecute(c *gcli.Command, args []string) error {
	fmt.Print("hello, in example command\n")

	magentaln := color.Magenta.Println

	magentaln("All options:")
	fmt.Printf("%+v\n", exampleOpts)
	magentaln("Raw args:")
	fmt.Printf("%v\n", args)

	magentaln("Get arg by name:")
	arr := c.Arg("arrArg")
	fmt.Printf("named array arg '%s', value: %v\n", arr.Name, arr.Value)

	magentaln("All named args:")
	for _, arg := range c.Args() {
		fmt.Printf("named arg '%s': %+v\n", arg.Name, *arg)
	}

	return nil
}
  • display the command help:
go build ./_examples/cliapp.go && ./cliapp example -h

cmd-help

Bind Option(flag)

Available methods:

BoolOpt(p *bool, name, shorts string, defValue bool, desc string)
BoolVar(p *bool, meta FlagMeta)
Float64Opt(p *float64, name, shorts string, defValue float64, desc string)
Float64Var(p *float64, meta FlagMeta)
Int64Opt(p *int64, name, shorts string, defValue int64, desc string)
Int64Var(p *int64, meta FlagMeta)
IntOpt(p *int, name, shorts string, defValue int, desc string)
IntVar(p *int, meta FlagMeta)
StrOpt(p *string, name, shorts, defValue, desc string)
StrVar(p *string, meta FlagMeta)
Uint64Opt(p *uint64, name, shorts string, defValue uint64, desc string)
Uint64Var(p *uint64, meta FlagMeta)
UintOpt(p *uint, name, shorts string, defValue uint, desc string)
UintVar(p *uint, meta FlagMeta)
Var(p flag.Value, meta FlagMeta)
VarOpt(p flag.Value, name, shorts, desc string)

Usage examples:

var id int
var b bool
var opt, dir string
var f1 float64
var names gcli.Strings

// bind options
cmd.IntOpt(&id, "id", "", 2, "the id option")
cmd.BoolOpt(&b, "bl", "b", false, "the bool option")
// notice `DIRECTORY` will replace to option value type
cmd.StrOpt(&dir, "dir", "d", "", "the `DIRECTORY` option")
// setting option name and short-option name
cmd.StrOpt(&opt, "opt", "o", "", "the option message")
// setting a special option var, it must implement the flag.Value interface
cmd.VarOpt(&names, "names", "n", "the option message")
Bind Argument

About arguments:

  • Required argument cannot be defined after optional argument
  • Only one array parameter is allowed
  • The (array)argument of multiple values ​​can only be defined at the end

Available methods:

Add(arg Argument) *Argument
AddArg(name, desc string, requiredAndIsArray ...bool) *Argument
AddArgument(arg *Argument) *Argument
BindArg(arg Argument) *Argument

Usage examples:

cmd.AddArg("arg0", "the first argument, is required", true)
cmd.AddArg("arg1", "the second argument, is required", true)
cmd.AddArg("arg2", "the optional argument, is optional")
cmd.AddArg("arrArg", "the array argument, is array", false, true)

can also use Arg()/BindArg():

cmd.Arg("arg0", gcli.Argument{
	Name: "ag0",
	Desc: "the first argument, is required",
	Require: true,
})
cmd.BindArg("arg0", gcli.Argument{
	Name: "ag0",
	Desc: "the second argument, is required",
	Require: true,
})
cmd.Arg("arg2", gcli.Argument{
	Name: "ag0",
	Desc: "the third argument, is is optional",
})

cmd.BindArg("arrArg", gcli.Argument{
	Name: "arrArg",
	Desc: "the third argument, is is array",
	IsArray: true,
})

Progress display

Package progress provide terminal progress bar display.

Such as: Txt, Bar, Loading, RoundTrip, DynamicText ...

  • progress.Bar progress bar

Demo: ./cliapp prog bar

prog-bar

  • progress.Txt text progress bar

Demo: ./cliapp prog txt

prog-bar

  • progress.LoadBar pending/loading progress bar

prog-demo

  • progress.Counter counter
  • progress.RoundTrip round trip progress bar
[===     ] -> [    === ] -> [ ===    ]

prog-demo

  • progress.DynamicText dynamic text message

Examples:

package main

import (
	"time"

	"github.com/gookit/gcli/v2/progress"
)

func main()  {
	speed := 100
	maxSteps := 110
	p := progress.Bar(maxSteps)
	p.Start()

	for i := 0; i < maxSteps; i++ {
		time.Sleep(time.Duration(speed) * time.Millisecond)
		p.Advance()
	}

	p.Finish()
}

more demos please see progress_demo.go

run demos:

go run ./_examples/cliapp.go prog txt
go run ./_examples/cliapp.go prog bar
go run ./_examples/cliapp.go prog roundTrip

prog-other

Interactive methods

console interactive methods

  • interact.ReadInput
  • interact.ReadLine
  • interact.ReadFirst
  • interact.Confirm
  • interact.Select/Choice
  • interact.MultiSelect/Checkbox
  • interact.Question/Ask
  • interact.ReadPassword

Examples:

package main

import (
	"fmt"

	"github.com/gookit/gcli/v2/interact"
)

func main() {
	username, _ := interact.ReadLine("Your name?")
	password := interact.ReadPassword("Your password?")
	
	ok := interact.Confirm("ensure continue?")
	if !ok {
		// do something...
	}
    
	fmt.Printf("username: %s, password: %s\n", username, password)
}
Read Input

read user input message

ans, _ := interact.ReadLine("Your name? ")

if ans != "" {
    color.Println("Your input: ", ans)
} else {
    color.Cyan.Println("No input!")
}

interact-read

Select/Choice
ans := interact.SelectOne(
    "Your city name(use array)?",
    []string{"chengdu", "beijing", "shanghai"},
    "",
)
color.Comment.Println("your select is: ", ans)

interact-select

Multi Select/Checkbox
ans := interact.MultiSelect(
    "Your city name(use array)?",
    []string{"chengdu", "beijing", "shanghai"},
    nil,
)
color.Comment.Println("your select is: ", ans)

interact-select

Confirm Message
if interact.Confirm("Ensure continue") {
    fmt.Println(emoji.Render(":smile: Confirmed"))
} else {
    color.Warn.Println("Unconfirmed")
}

interact-confirm

Read Password
pwd := interact.ReadPassword()

color.Comment.Println("your input password is: ", pwd)

interact-passwd

CLI Color

Terminal color use gookit/color Support windows cmd.exe powerShell

  • Color output display

colored-demo

Usage
package main

import (
    "github.com/gookit/color"
)

func main() {
	// simple usage
	color.Cyan.Printf("Simple to use %s\n", "color")

	// internal theme/style:
	color.Info.Tips("message")
	color.Info.Prompt("message")
	color.Info.Println("message")
	color.Warn.Println("message")
	color.Error.Println("message")
	
	// custom color
	color.New(color.FgWhite, color.BgBlack).Println("custom color style")

	// can also:
	color.Style{color.FgCyan, color.OpBold}.Println("custom color style")
	
	// use defined color tag
	color.Print("use color tag: <suc>he</><comment>llo</>, <cyan>wel</><red>come</>\n")

	// use custom color tag
	color.Print("custom color tag: <fg=yellow;bg=black;op=underscore;>hello, welcome</>\n")

	// set a style tag
	color.Tag("info").Println("info style text")

	// prompt message
	color.Info.Prompt("prompt style message")
	color.Warn.Prompt("prompt style message")

	// tips message
	color.Info.Tips("tips style message")
	color.Warn.Tips("tips style message")
}
More usage
  • Basic color
color.Bold.Println("bold message")
color.Yellow.Println("yellow message")
  • Extra themes
color.Info.Println("Info message")
color.Danger.Println("Danger message")
color.Error.Println("Error message")
color.Success.Println("Success message")
  • Use like html tag

Support working on windows cmd.exe powerShell

// use style tag
color.Print("<suc>he</><comment>llo</>, <cyan>wel</><red>come</>")
color.Println("<suc>hello</>")
color.Println("<error>hello</>")
color.Println("<warning>hello</>")

// custom color attributes
color.Print("<fg=yellow;bg=black;op=underscore;>hello, welcome</>\n")

For more information on the use of color libraries, please visit gookit/color

Gookit packages

  • gookit/ini Go config management, use INI files
  • gookit/rux Simple and fast request router for golang HTTP
  • gookit/gcli build CLI application, tool library, running CLI commands
  • gookit/event Lightweight event manager and dispatcher implements by Go
  • gookit/cache Generic cache use and cache manager for golang. support File, Memory, Redis, Memcached.
  • gookit/config Go config management. support JSON, YAML, TOML, INI, HCL, ENV and Flags
  • gookit/color A command-line color library with true color support, universal API methods and Windows support
  • gookit/filter Provide filtering, sanitizing, and conversion of golang data
  • gookit/validate Use for data validation and filtering. support Map, Struct, Form data
  • gookit/goutil Some utils for the Go: string, array/slice, map, format, cli, env, filesystem, test and more
  • More please see https://github.com/gookit

See also

License

MIT

Documentation

Overview

Package gcli is a simple to use command line application and tool library.

Contains: cli app, flags parse, interact, progress, data show tools.

Source code and other details for the project are available at GitHub:

https://github.com/gookit/gcli

Usage please refer examples and see README

Index

Constants

View Source
const (
	VerbQuiet uint = iota // don't report anything
	VerbError             // reporting on error
	VerbWarn
	VerbInfo
	VerbDebug
	VerbCrazy
)

constants for error level 0 - 4

View Source
const (
	EvtAppInit   = "app.init"
	EvtAppBefore = "app.run.before"
	EvtAppAfter  = "app.run.after"
	EvtAppError  = "app.run.error"

	EvtCmdInit   = "cmd.init"
	EvtCmdBefore = "cmd.run.before"
	EvtCmdAfter  = "cmd.run.after"
	EvtCmdError  = "cmd.run.error"

	EvtAppPrepareAfter = "app.prepare.after"
)

constants for hooks event, there are default allowed event names

View Source
const (
	// OK success exit code
	OK = 0
	// ERR error exit code
	ERR = 2
	// GOON prepare run successful, goon run command
	GOON = -1
	// HelpCommand name
	HelpCommand = "help"
)
View Source
const (
	AlignLeft  = strutil.PosRight
	AlignRight = strutil.PosLeft
	// FlagTagName on struct
	FlagTagName = "flag"
)

The options alignment type - Align right, padding left - Align left, padding right

View Source
const HelpVarFormat = "{$%s}"

HelpVarFormat allow var replace on render help info. Default support:

"{$binName}" "{$cmd}" "{$fullCmd}" "{$workDir}"

Variables

View Source
var AppHelpTemplate = `` /* 579-byte string literal not displayed */

AppHelpTemplate help template for app(all commands)

View Source
var (

	// CLI create an default instance
	CLI = &cmdLine{
		pid: os.Getpid(),

		osName:  runtime.GOOS,
		binName: os.Args[0],
		argLine: strings.Join(os.Args[1:], " "),
	}
)
View Source
var CmdHelpTemplate = `` /* 665-byte string literal not displayed */

CmdHelpTemplate help template for a command

View Source
var Version = "2.2.1"

Version the gCli version

Functions

func Logf

func Logf(level uint, format string, v ...interface{})

Logf print log message

func Print

func Print(args ...interface{})

Print messages

func Printf

func Printf(format string, args ...interface{})

Printf messages

func Println

func Println(args ...interface{})

Println messages

func SetDebugMode

func SetDebugMode()

SetDebugMode level

func SetQuietMode

func SetQuietMode()

SetQuietMode level

func SetStrictMode

func SetStrictMode(strict bool)

SetStrictMode for parse flags

func SetVerbose

func SetVerbose(verbose uint)

SetVerbose level

func StrictMode

func StrictMode() bool

StrictMode get is strict mode

func Verbose

func Verbose() uint

Verbose returns verbose level

Types

type App

type App struct {

	// Name app name
	Name string
	// Version app version. like "1.0.1"
	Version string
	// Description app description
	Description string
	Logo Logo
	// Args default is equals to os.args
	Args []string
	// ExitOnEnd call os.Exit on running end
	ExitOnEnd bool
	// ExitFunc default is os.Exit
	ExitFunc func(int)
	// contains filtered or unexported fields
}

App the cli app definition

func InitStdApp

func InitStdApp(fn ...func(a *App)) *App

InitStdApp create the default cli app.

func NewApp

func NewApp(fn ...func(a *App)) *App

NewApp create new app instance. Usage:

NewApp()
// Or with a config func
NewApp(func(a *App) {
	// do something before init ....
	a.Hooks[gcli.EvtInit] = func () {}
})

func StdApp

func StdApp() *App

StdApp get the default std app

func (*App) Add

func (app *App) Add(c *Command, more ...*Command)

Add add one or multi command(s)

func (*App) AddAliases

func (app *App) AddAliases(command string, aliases ...string)

AddAliases add alias names for a command

func (*App) AddCommand

func (app *App) AddCommand(c *Command) *Command

AddCommand add a new command

func (*App) AddCommander

func (app *App) AddCommander(cmder Commander) *Command

AddCommander to the application

func (*App) AddError

func (app *App) AddError(err error)

AddError to the application

func (*App) CleanArgs

func (app *App) CleanArgs() []string

CleanArgs get clean args

func (*App) CommandName

func (app *App) CommandName() string

CommandName get current command name

func (*App) CommandNames

func (app *App) CommandNames() []string

CommandNames get all command names

func (*App) Commands

func (app *App) Commands() map[string]*Command

Commands get all commands

func (*App) Config

func (app *App) Config(fn func(a *App))

Config the application. Notice: must be called before adding a command

func (*App) DefaultCommand

func (app *App) DefaultCommand(name string)

DefaultCommand set default command name

func (*App) Exec

func (app *App) Exec(name string, args []string) (err error)

Exec running other command in current command

func (*App) Exit

func (app *App) Exit(code int)

Exit get the app GlobalFlags

func (App) GlobalFlags

func (c App) GlobalFlags() *Flags

GlobalFlags get the app GlobalFlags

func (*App) HasCommand

func (app *App) HasCommand(name string) bool

HasCommand in the application

func (*App) IsAlias

func (app *App) IsAlias(str string) bool

IsAlias name check

func (*App) IsCommand

func (app *App) IsCommand(name string) bool

IsCommand name check

func (*App) Names

func (app *App) Names() map[string]int

Names get all command names

func (*App) NewCommand

func (app *App) NewCommand(name, useFor string, config func(c *Command)) *Command

NewCommand create a new command

func (*App) On

func (app *App) On(name string, handler HookFunc)

On add hook handler for a hook event

func (*App) RealCommandName

func (app *App) RealCommandName(alias string) string

RealCommandName get real command name by alias Deprecated

func (*App) RemoveCommand

func (app *App) RemoveCommand(names ...string) int

RemoveCommand from the application

func (*App) ResolveName

func (app *App) ResolveName(alias string) string

ResolveName get real command name by alias

func (*App) Run

func (app *App) Run() (code int)

Run running application

func (*App) SetDebugMode

func (app *App) SetDebugMode()

SetDebugMode level

func (app *App) SetLogo(logo string, style ...string)

SetLogo text and color style

func (*App) SetQuietMode

func (app *App) SetQuietMode()

SetQuietMode level

func (*App) SetVerbose

func (app *App) SetVerbose(verbose uint)

SetVerbose level

type Argument

type Argument struct {
	// Name argument name. it's required
	Name string
	// Desc argument description message
	Desc string
	// Type name. eg: string, int, array
	// Type string
	// ShowName is a name for display help. default is equals to Name.
	ShowName string
	// Required arg is required
	Required bool
	// IsArray if is array, can allow accept multi values, and must in last.
	IsArray bool
	// valWrapper Value TODO ...
	// value store parsed argument data. (type: string, []string)
	Value interface{}
	// Handler custom argument value handler on call GetValue()
	Handler func(val interface{}) interface{}
	// Validator you can add an validator, will call it on binding argument value
	Validator func(val interface{}) (interface{}, error)
	// contains filtered or unexported fields
}

Argument a command argument definition

func NewArgument

func NewArgument(name, desc string, requiredAndIsArray ...bool) *Argument

NewArgument quick create an new command argument

func (*Argument) Array

func (a *Argument) Array() (ss []string)

Array alias of the Strings()

func (*Argument) GetValue

func (a *Argument) GetValue() interface{}

GetValue get value by custom handler func

func (*Argument) HasValue

func (a *Argument) HasValue() bool

HasValue value is empty

func (*Argument) HelpName

func (a *Argument) HelpName() string

HelpName for render help message

func (*Argument) Index

func (a *Argument) Index() int

Index get argument index in the command

func (*Argument) Int

func (a *Argument) Int(defVal ...int) int

Int argument value to int

func (*Argument) IsEmpty

func (a *Argument) IsEmpty() bool

IsEmpty argument is empty

func (*Argument) SetValue

func (a *Argument) SetValue(val interface{}) error

SetValue set an validated value

func (*Argument) String

func (a *Argument) String(defVal ...string) string

String argument value to string

func (*Argument) StringSplit

func (a *Argument) StringSplit(sep ...string) (ss []string)

StringSplit quick split a string argument to string slice

func (*Argument) Strings

func (a *Argument) Strings() (ss []string)

Strings argument value to string array, if argument isArray = true.

func (*Argument) WithConfig

func (a *Argument) WithConfig(fn func(arg *Argument)) *Argument

Config the argument

func (*Argument) WithValidator

func (a *Argument) WithValidator(fn func(interface{}) (interface{}, error)) *Argument

WithValidator set an value validator of the argument

type Arguments

type Arguments struct {
	// contains filtered or unexported fields
}

Arguments definition

func (*Arguments) Add

func (ags *Arguments) Add(arg Argument) *Argument

Add alias of the AddArgument()

func (*Arguments) AddArg

func (ags *Arguments) AddArg(name, desc string, requiredAndIsArray ...bool) *Argument

AddArg binding an named argument for the command. Notice:

	- Required argument cannot be defined after optional argument
 - Only one array parameter is allowed
	- The (array) argument of multiple values ​​can only be defined at the end

Usage:

cmd.AddArg("name", "description")
cmd.AddArg("name", "description", true) // required
cmd.AddArg("names", "description", true, true) // required and is array

func (*Arguments) AddArgument

func (ags *Arguments) AddArgument(arg *Argument) *Argument

AddArgument binding an named argument for the command.

Notice:

	- Required argument cannot be defined after optional argument
 - Only one array parameter is allowed
	- The (array) argument of multiple values ​​can only be defined at the end

func (*Arguments) Arg

func (ags *Arguments) Arg(name string) *Argument

Arg get arg by defined name. Usage:

intVal := ags.Arg("name").Int()
strVal := ags.Arg("name").String()
arrVal := ags.Arg("names").Array()

func (*Arguments) ArgByIndex

func (ags *Arguments) ArgByIndex(i int) *Argument

ArgByIndex get named arg by index

func (*Arguments) Args

func (ags *Arguments) Args() []*Argument

Args get all defined argument

func (*Arguments) BindArg

func (ags *Arguments) BindArg(arg Argument) *Argument

BindArg alias of the AddArgument()

func (*Arguments) HasArg

func (ags *Arguments) HasArg(name string) bool

HasArg check named argument is defined

func (*Arguments) ParseArgs

func (ags *Arguments) ParseArgs(args []string) (err error)

ParseArgs for Arguments

func (*Arguments) SetName

func (ags *Arguments) SetName(name string)

SetName for Arguments

func (*Arguments) SetValidateNum

func (ags *Arguments) SetValidateNum(validateNum bool)

SetValidateNum check

type Booleans

type Booleans []bool

Booleans The bool flag list, implemented flag.Value interface

func (*Booleans) Set

func (s *Booleans) Set(value string) error

Set new value

func (*Booleans) String

func (s *Booleans) String() string

String to string

type CmdFunc

type CmdFunc func(c *Command, args []string) error

CmdFunc definition

func (CmdFunc) Run

func (f CmdFunc) Run(c *Command, args []string) error

Run implement the Runner interface

type Command

type Command struct {

	// Name is the full command name.
	Name string

	// UseFor is the command description message.
	UseFor string
	// Aliases is the command name's alias names
	Aliases []string
	// Config func, will call on `initialize`.
	// - you can config options and other init works
	Config func(c *Command)
	// Flags(command options) is a set of flags specific to this command.
	// Flags flag.FlagSet
	// Examples some usage example display
	Examples string
	// Func is the command handler func. Func Runner
	Func CmdFunc
	// Help is the long help message text
	Help string
	// HelpRender custom render cmd help message
	HelpRender func(c *Command)

	// CustomFlags indicates that the command will do its own flag parsing.
	CustomFlags bool
	// Arguments for the command
	Arguments
	// Flags options for the command.
	Flags
	// contains filtered or unexported fields
}

Command a CLI command structure

func NewCommand

func NewCommand(name, useFor string, fn ...func(c *Command)) *Command

NewCommand create a new command instance. Usage:

cmd := NewCommand("my-cmd", "description")
// OR with an config func
cmd := NewCommand("my-cmd", "description", func(c *Command) { ... })
app.Add(cmd) // OR cmd.AttachTo(app)

func (*Command) AliasesString

func (c *Command) AliasesString(sep ...string) string

AliasesString returns aliases string

func (*Command) App

func (c *Command) App() *App

App returns the CLI application

func (*Command) AttachTo

func (c *Command) AttachTo(app *App)

AttachTo attach the command to CLI application

func (*Command) Copy

func (c *Command) Copy() *Command

Copy a new command for current

func (*Command) Disable

func (c *Command) Disable()

Disable set cmd is disabled

func (*Command) Errorf

func (c *Command) Errorf(format string, v ...interface{}) error

Errorf format message and add error to the command

func (*Command) Fire

func (c *Command) Fire(event string, data interface{})

Fire event handler by name

func (Command) GlobalFlags

func (c Command) GlobalFlags() *Flags

GlobalFlags get the app GlobalFlags

func (*Command) IsAlone

func (c *Command) IsAlone() bool

IsAlone running

func (*Command) IsDisabled

func (c *Command) IsDisabled() bool

IsDisabled get cmd is disabled

func (*Command) Logf

func (c *Command) Logf(level uint, format string, v ...interface{})

Logf print log message

func (*Command) Module

func (c *Command) Module() string

Module name of the grouped command

func (*Command) MustRun

func (c *Command) MustRun(inArgs []string)

MustRun Alone the current command, will panic on error

func (*Command) NotAlone

func (c *Command) NotAlone() bool

NotAlone running

func (*Command) On

func (c *Command) On(name string, handler HookFunc)

On add hook handler for a hook event

func (*Command) Run

func (c *Command) Run(inArgs []string) (err error)

Run Alone the current command

func (*Command) Runnable

func (c *Command) Runnable() bool

Runnable reports whether the command can be run; otherwise it is a documentation pseudo-command such as import path.

func (*Command) SetFunc

func (c *Command) SetFunc(fn CmdFunc) *Command

SetFunc Settings command handler func

func (*Command) ShowHelp

func (c *Command) ShowHelp()

ShowHelp show command help info

func (*Command) SubName

func (c *Command) SubName() string

SubName name of the grouped command

type Commander

type Commander interface {
	// Creator for create new command
	Creator() *Command
	// Prepare bind Flags or Arguments for the command
	Prepare(c *Command)
	// Execute(c *Command, args []string) error
	Run(c *Command, args []string) error
}

Commander interface definition

type Executor

type Executor interface {
}

Executor definition

type FlagMeta

type FlagMeta struct {
	// varPtr interface{}
	// name and description
	Name, Desc string
	// default value for the flag option
	DefVal interface{}

	// short names. eg: ["o", "a"]
	Shorts []string
	// advanced settings
	Hidden, Required bool
	// Validator support validate the option flag value
	Validator func(val string) error
	// contains filtered or unexported fields
}

FlagMeta for an flag(option/argument)

func (*FlagMeta) DValue

func (m *FlagMeta) DValue() *goutil.Value

DValue wrap the default value

func (*FlagMeta) Shorts2String

func (m *FlagMeta) Shorts2String(sep ...string) string

Shorts2String join shorts to an string

func (*FlagMeta) Validate

func (m *FlagMeta) Validate(val string) error

Validate the binding value

type Flags

type Flags struct {
	// FlagsOption option for render help message
	FlagsOption
	// contains filtered or unexported fields
}

Flags struct definition

func NewFlags

func NewFlags(name ...string) *Flags

NewFlags create an new Flags

func (*Flags) BoolOpt

func (fs *Flags) BoolOpt(p *bool, name, shorts string, defValue bool, desc string)

BoolOpt binding an bool option

func (*Flags) BoolVar

func (fs *Flags) BoolVar(p *bool, meta FlagMeta)

BoolVar binding an bool option flag

func (*Flags) FSet

func (fs *Flags) FSet() *flag.FlagSet

FSet get the raw *flag.FlagSet

func (*Flags) FlagMeta

func (fs *Flags) FlagMeta(name string) *FlagMeta

FlagMeta get FlagMeta by name

func (*Flags) FlagNames

func (fs *Flags) FlagNames() map[string]int

FlagNames return all option names

func (*Flags) Float64Opt

func (fs *Flags) Float64Opt(p *float64, name, shorts string, defValue float64, desc string)

Float64Opt binding an float64 option

func (*Flags) Float64Var

func (fs *Flags) Float64Var(p *float64, meta FlagMeta)

Float64Var binding an float64 option flag

func (*Flags) FromStruct

func (fs *Flags) FromStruct(ptr interface{}) error

FromStruct from struct tag binding options

func (*Flags) HasFlag

func (fs *Flags) HasFlag(name string) bool

HasFlag check it is a option name. alias of HasOption()

func (*Flags) HasFlagMeta

func (fs *Flags) HasFlagMeta(name string) bool

HasFlagMeta check it is has FlagMeta

func (*Flags) HasOption

func (fs *Flags) HasOption(name string) bool

HasOption check it is a option name

func (*Flags) InitFlagSet

func (fs *Flags) InitFlagSet(name string)

create and init flag.FlagSet

func (*Flags) Int64Opt

func (fs *Flags) Int64Opt(p *int64, name, shorts string, defValue int64, desc string)

Int64Opt binding an int64 option

func (*Flags) Int64Var

func (fs *Flags) Int64Var(p *int64, meta FlagMeta)

Int64Var binding an uint option flag

func (*Flags) IntOpt

func (fs *Flags) IntOpt(p *int, name, shorts string, defValue int, desc string)

IntOpt binding an int option

func (*Flags) IntVar

func (fs *Flags) IntVar(p *int, meta FlagMeta)

IntVar binding an int option flag

func (*Flags) IsOption

func (fs *Flags) IsOption(name string) bool

IsOption check it is a option name

func (*Flags) IsShortName

func (fs *Flags) IsShortName(short string) bool

IsShortcut check it is a shortcut name

func (*Flags) IsShortOpt

func (fs *Flags) IsShortOpt(short string) bool

IsShortOpt alias of the IsShortcut()

func (*Flags) IterAll

func (fs *Flags) IterAll(fn func(f *flag.Flag, meta *FlagMeta))

IterAll Iteration all flag options with metadata

func (*Flags) Len

func (fs *Flags) Len() int

Len of the Flags

func (*Flags) LookupFlag

func (fs *Flags) LookupFlag(name string) *flag.Flag

LookupFlag get flag.Flag by name

func (*Flags) Metas

func (fs *Flags) Metas() map[string]*FlagMeta

Metas get all flag metas

func (*Flags) Name

func (fs *Flags) Name() string

Name of the Flags

func (*Flags) Parse

func (fs *Flags) Parse(args []string) (err error)

Parse given arguments

func (*Flags) PrintHelpPanel

func (fs *Flags) PrintHelpPanel()

PrintHelpPanel for all options to the gf.out

func (*Flags) RawArg

func (fs *Flags) RawArg(i int) string

RawArg get an argument value by index

func (*Flags) RawArgs

func (fs *Flags) RawArgs() []string

RawArgs get all raw arguments

func (*Flags) SetFlagSet

func (fs *Flags) SetFlagSet(fSet *flag.FlagSet)

SetFlagSet set the raw *flag.FlagSet

func (*Flags) SetOutput

func (fs *Flags) SetOutput(out io.Writer)

SetOutput for the Flags

func (*Flags) ShortNames

func (fs *Flags) ShortNames(name string) (ss []string)

ShortNames get all short-names of the option

func (*Flags) StrOpt

func (fs *Flags) StrOpt(p *string, name, shorts, defValue, desc string)

StrOpt binding an string option

func (*Flags) StrVar

func (fs *Flags) StrVar(p *string, meta FlagMeta)

StrVar binding an string option flag

func (*Flags) String

func (fs *Flags) String() string

String for all flag options

func (*Flags) Uint64Opt

func (fs *Flags) Uint64Opt(p *uint64, name, shorts string, defValue uint64, desc string)

Uint64Opt binding an uint64 option

func (*Flags) Uint64Var

func (fs *Flags) Uint64Var(p *uint64, meta FlagMeta)

Uint64Var binding an uint option flag

func (*Flags) UintOpt

func (fs *Flags) UintOpt(p *uint, name, shorts string, defValue uint, desc string)

UintOpt binding an uint option

func (*Flags) UintVar

func (fs *Flags) UintVar(p *uint, meta FlagMeta)

UintVar binding an uint option flag

func (*Flags) Var

func (fs *Flags) Var(p flag.Value, meta FlagMeta)

Var binding an custom var option flag

func (*Flags) VarOpt

func (fs *Flags) VarOpt(p flag.Value, name, shorts, desc string)

VarOpt binding a custom var option Usage:

var names gcli.Strings
cmd.VarOpt(&names, "tables", "t", "description ...")

func (*Flags) WithOption

func (fs *Flags) WithOption(cfg FlagsOption) *Flags

WithOption for render help panel message

type FlagsOption

type FlagsOption struct {
	// WithoutType dont display flag data type on print help
	WithoutType bool
	// NameDescOL flag and desc at one line on print help
	NameDescOL bool
	// Alignment flag align left or right. default is: right
	Alignment uint8
	// TagName on struct
	TagName string
}

FlagsOption for render help information

type GlobalOpts

type GlobalOpts struct {
	NoColor bool
	// contains filtered or unexported fields
}

GlobalOpts global flags

func GOpts

func GOpts() *GlobalOpts

GOpts get the global options

type HelpVars

type HelpVars struct {
	// varLeft, varRight string
	// varFormat string
	// Vars you can add some vars map for render help info
	Vars map[string]string
}

HelpVars struct. provide string var function for render help template.

func (*HelpVars) AddVar

func (hv *HelpVars) AddVar(name, value string)

AddVar get command name

func (*HelpVars) AddVars

func (hv *HelpVars) AddVars(vars map[string]string)

AddVars add multi tpl vars

func (*HelpVars) GetVar

func (hv *HelpVars) GetVar(name string) string

GetVar get a help var by name

func (*HelpVars) GetVars

func (hv *HelpVars) GetVars() map[string]string

GetVars get all tpl vars

func (*HelpVars) ReplaceVars

func (hv *HelpVars) ReplaceVars(input string) string

ReplaceVars replace vars in the input string.

type HookFunc

type HookFunc func(obj ...interface{})

HookFunc definition. func arguments:

in app, like: func(app *App, data interface{})
in cmd, like: func(cmd *Command, data interface{})

type HookFunc func(obj interface{}, data interface{})

type Hooks

type Hooks struct {
	// contains filtered or unexported fields
}

Hooks struct

func (*Hooks) AddOn

func (h *Hooks) AddOn(name string, handler HookFunc)

AddOn register on not exists hook.

func (*Hooks) ClearHooks

func (h *Hooks) ClearHooks()

ClearHooks clear hooks data

func (*Hooks) Fire

func (h *Hooks) Fire(event string, data ...interface{})

Fire event by name, allow with event data

func (*Hooks) On

func (h *Hooks) On(name string, handler HookFunc)

On register event hook by name

type Ints

type Ints []int

Ints The int flag list, implemented flag.Value interface

func (*Ints) Set

func (s *Ints) Set(value string) error

Set new value

func (*Ints) String

func (s *Ints) String() string

String to string

type Logo struct {
	Text  string // ASCII logo string
	Style string // eg "info"
}

Logo app logo, ASCII logo

type Runner

type Runner interface {
	// Config(c *Command)
	Run(c *Command, args []string) error
}

Runner interface

type RunningAble

type RunningAble struct {
}

Executor definition

type Strings

type Strings []string

Strings The string flag list, implemented flag.Value interface

func (*Strings) Set

func (s *Strings) Set(value string) error

Set new value

func (*Strings) String

func (s *Strings) String() string

String to string

Directories

Path Synopsis
cmd
sflag
Package sflag is an simple cli flag parse tool
Package sflag is an simple cli flag parse tool
Package interact collect some interactive methods for CLI
Package interact collect some interactive methods for CLI
Package progress provide terminal progress bar display.
Package progress provide terminal progress bar display.
Package show provides some formatter tools for display data.
Package show provides some formatter tools for display data.