cmdr

package module
v1.11.26 Latest Latest
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 Go to latest Published: Dec 20, 2023 License: MIT Imports: 47 Imported by: 78

README

cmdr

Go GitHub tag (latest SemVer) GoDoc FOSSA Status go.dev Go Report Card codecov Mentioned in Awesome Go

cmdr is a POSIX-compliant, command-line argument parser library in Golang. It is a getopt-like parser of command-line options, be compatible with the getopt_long command line UI, which is an extension of the syntax recommended by POSIX.

It's a replacement of the standard library flag.

Also, there is a fully-functional Options Store (configurations) integrated for your hierarchical configuration dataset.

The .netCore version Cmdr.Core is available now. A cxx version cmdr-cxx was released (Happy Spring Festival 2021).

ee99d078e2f7

See the image frames at #1.

See our extras:

and Bonus of #cmdr Series:

News

FRZ: It means I'm planning and in working for cmdr.v2, but the plan is delayed. In recently months, sadly, some things took my focus. But the v2 will be here soon.
In our v2's wishlist, codes will be rewritten completely since I understand coding more in golang, well, perhaps, I hope so.

  • docs (WIP):

  • v1.11.26 (FRZ)

    • security patch: upgrade golang.org/x/crypto to 0.17.0

  • v1.11.25 (FRZ)

    • security patch: google/x/net and more
    • upgrade deps

  • v1.11.23 (FRZ)

    • security patch: google/x/net and more
    • improved some writings
    • fixed/improved cmdr.Get() to extract some fields more deeply
    • added Flag.GetDottedNamePathEx()
    • improved defaultActionImpl to flush all outputs at once
    • make default action outputs colorful

  • v1.11.21 (FRZ)

    • NOTE: switched toolchain to go1.18 (see the go.mod)

    • now you may return ErrNotImpl to fallback to default action at early developing

      Expand to details

      There are 3 ways to make or fallback to cmdr default impl to get some debug information:

       1. set action to nil;
 2. use envvar `FORCE_DEFAULT_ACTION=1`;
 3. return `cmdr.ErrNotImpl` in your action handler:

      listCmd := cmdr.NewSubCmd().Titles("list", "ls").
  Description("list projects in .poi.yml").
  Action(func(cmd *cmdr.Command, args []string) (err error) {
    err = cmdr.ErrNotImpl // notify caller fallback to defaultAction
    return
  }).
  AttachTo(root)

      The default action of a command handler will print flags hit info and others useful info.

  • More details at CHANGELOG

Features

Features.md

Old README.md: README.old.md

For Developer

For Developer

Fast Guide

See example-app, examples/, and cmdr-examples

Expand to source codes 
package main

import (
	"fmt"

	"github.com/hedzr/cmdr"
	"github.com/hedzr/cmdr/plugin/pprof"
	"github.com/hedzr/cmdr/tool"
	"github.com/hedzr/log"
	"github.com/hedzr/log/buildtags"
	"github.com/hedzr/log/isdelve"
	"github.com/hedzr/logex/build"
	"gopkg.in/hedzr/errors.v3"
)

func main() {
	Entry()
}

func Entry() {
	root := buildRootCmd()
	if err := cmdr.Exec(root, options...); err != nil {
		log.Fatalf("error occurs in app running: %+v\n", err)
	}
}

func buildRootCmd() (rootCmd *cmdr.RootCommand) {
	root := cmdr.Root(appName, version).
		// AddGlobalPreAction(func(cmd *cmdr.Command, args []string) (err error) {
		//	// cmdr.Set("enable-ueh", true)
		//	return
		// }).
		// AddGlobalPreAction(func(cmd *cmdr.Command, args []string) (err error) {
		//	//fmt.Printf("# global pre-action 2, exe-path: %v\n", cmdr.GetExecutablePath())
		//	return
		// }).
		// AddGlobalPostAction(func(cmd *cmdr.Command, args []string) {
		//	//fmt.Println("# global post-action 1")
		// }).
		// AddGlobalPostAction(func(cmd *cmdr.Command, args []string) {
		//	//fmt.Println("# global post-action 2")
		// }).
		Copyright(copyright, "hedzr").
		Description(desc, longDesc).
		Examples(examples)
	rootCmd = root.RootCommand()

	// for your biz-logic, constructing an AttachToCmdr(root *cmdr.RootCmdOpt) is recommended.
	// see our full sample and template repo: https://github.com/hedzr/cmdr-go-starter
	// core.AttachToCmdr(root.RootCmdOpt())

	// These lines are removable

	cmdr.NewBool(false).
		Titles("enable-ueh", "ueh").
		Description("Enables the unhandled exception handler?").
		AttachTo(root)
	// cmdrPanic(root)
	cmdrSoundex(root)
	// pprof.AttachToCmdr(root.RootCmdOpt())
	return
}

func cmdrSoundex(root cmdr.OptCmd) {
	cmdr.NewSubCmd().Titles("soundex", "snd", "sndx", "sound").
		Description("soundex test").
		Group("Test").
		TailPlaceholder("[text1, text2, ...]").
		Action(func(cmd *cmdr.Command, args []string) (err error) {
			for ix, s := range args {
				fmt.Printf("%5d. %s => %s\n", ix, s, tool.Soundex(s))
			}
			return
		}).
		AttachTo(root)
}

func onUnhandledErrorHandler(err interface{}) {
	if cmdr.GetBoolR("enable-ueh") {
		dumpStacks()
	}

	panic(err) // re-throw it
}

func dumpStacks() {
	fmt.Printf("\n\n=== BEGIN goroutine stack dump ===\n%s\n=== END goroutine stack dump ===\n\n", errors.DumpStacksAsString(true))
}

func init() {
	options = append(options,
		cmdr.WithUnhandledErrorHandler(onUnhandledErrorHandler),

		// cmdr.WithLogxShort(defaultDebugEnabled,defaultLoggerBackend,defaultLoggerLevel),
		cmdr.WithLogx(build.New(build.NewLoggerConfigWith(
			defaultDebugEnabled, defaultLoggerBackend, defaultLoggerLevel,
			log.WithTimestamp(true, "")))),

		cmdr.WithHelpTailLine(`
# Type '-h'/'-?' or '--help' to get command help screen.
# Star me if it's helpful: https://github.com/hedzr/cmdr/examples/example-app
`),
	)

	if isDebugBuild() {
		options = append(options, pprof.GetCmdrProfilingOptions())
	}

	// enable '--trace' command line option to toggle a internal trace mode (can be retrieved by cmdr.GetTraceMode())
	// import "github.com/hedzr/cmdr-addons/pkg/plugins/trace"
	// trace.WithTraceEnable(defaultTraceEnabled)
	// Or:
	optAddTraceOption := cmdr.WithXrefBuildingHooks(func(root *cmdr.RootCommand, args []string) {
		cmdr.NewBool(false).
			Titles("trace", "tr").
			Description("enable trace mode for tcp/mqtt send/recv data dump", "").
			// Action(func(cmd *cmdr.Command, args []string) (err error) { println("trace mode on"); cmdr.SetTraceMode(true); return; }).
			Group(cmdr.SysMgmtGroup).
			AttachToRoot(root)
	}, nil)
	options = append(options, optAddTraceOption)
	// options = append(options, optAddServerExtOpt«ion)

	// allow and search '.<appname>.yml' at first
	locations := []string{".$APPNAME.yml"}
	locations = append(locations, cmdr.GetPredefinedLocations()...)
	options = append(options, cmdr.WithPredefinedLocations(locations...))

	// options = append(options, internal.NewAppOption())
}

var options []cmdr.ExecOption

func isDebugBuild() bool         { return isdelve.Enabled }
func isDockerBuild() bool        { return buildtags.IsDockerBuild() }
func isRunningInDockerEnv() bool { return cmdr.InDockerEnv() }

//goland:noinspection GoNameStartsWithPackageName
const (
	appName   = "example-app"
	version   = "0.2.5"
	copyright = "example-app - A devops tool - cmdr series"
	desc      = "example-app is an effective devops tool. It make an demo application for 'cmdr'"
	longDesc  = `example-app is an effective devops tool. It make an demo application for 'cmdr'.
`
	examples = `
$ {{.AppName}} gen shell [--bash|--zsh|--fish|--auto]
  generate bash/shell completion scripts
$ {{.AppName}} gen man
  generate linux man page 1
$ {{.AppName}} --help
  show help screen.
$ {{.AppName}} --help --man
  show help screen in manpage viewer (for linux/darwin).
`
	// overview = ``
	// zero = 0

	// defaultTraceEnabled  = true
	defaultDebugEnabled  = false
	defaultLoggerLevel   = "debug"
	defaultLoggerBackend = "logrus"
)
Tips for Building Your App

As building your app with cmdr, some build tags are suggested:

export GIT_REVISION="$(git rev-parse --short HEAD)"
export GIT_SUMMARY="$(git describe --tags --dirty --always)"
export GOVERSION="$(go version)"
export BUILDTIME="$(date -u '+%Y-%m-%d_%H-%M-%S')"
export VERSION="$(grep -E "Version[ \t]+=[ \t]+" doc.go|grep -Eo "[0-9.]+")"
export W_PKG="github.com/hedzr/cmdr/conf"
export LDFLAGS="-s -w \
    -X '$W_PKG.Githash=$GIT_REVISION' \
    -X '$W_PKG.GitSummary=$GIT_SUMMARY' \
    -X '$W_PKG.GoVersion=$GOVERSION' \
    -X '$W_PKG.Buildstamp=$BUILDTIME' \
    -X '$W_PKG.Version=$VERSION'"

go build -v -ldflags "$LDFLAGS" -o ./bin/your-app ./your-app/

Contrib

Feel free to issue me bug reports and fixes. Many thanks to all contributors.

Thanks to JODL

Thanks to JetBrains for donating product licenses to help develop cmdr
jetbrains goland

License

MIT

FOSSA Status

Documentation

Overview

Package cmdr is a golang library to interpret/parse the command-line input with POSIX-compliant mode

Index

Constants

View Source 
const (

	// UnsortedGroup for commands and flags
	UnsortedGroup = "zzzg.unsorted"
	// AddonsGroup for commands and flags
	AddonsGroup = "zzzh.Addons"
	// ExtGroup for commands and flags
	ExtGroup = "zzzi.Extensions"
	// AliasesGroup for commands and flags
	AliasesGroup = "zzzj.Aliases"
	// SysMgmtGroup for commands and flags
	SysMgmtGroup = "zzz9.Misc"

	// DefaultEditor is 'vim'
	DefaultEditor = "vim"

	// ExternalToolEditor environment variable name, EDITOR is fit for most of shells.
	ExternalToolEditor = "EDITOR"

	// ExternalToolPasswordInput enables secure password input without echo.
	ExternalToolPasswordInput = "PASSWD"
)
View Source 
const (
	// AppName const
	AppName = "cmdr"
	// Version const
	Version = "1.11.26"
	// VersionInt const
	VersionInt = 0x010b1a
)
View Source 
const (

	// FgBlack terminal color code
	FgBlack = 30
	// FgRed terminal color code
	FgRed = 31
	// FgGreen terminal color code
	FgGreen = 32
	// FgYellow terminal color code
	FgYellow = 33
	// FgBlue terminal color code
	FgBlue = 34
	// FgMagenta terminal color code
	FgMagenta = 35
	// FgCyan terminal color code
	FgCyan = 36
	// FgLightGray terminal color code
	FgLightGray = 37
	// FgDarkGray terminal color code
	FgDarkGray = 90
	// FgLightRed terminal color code
	FgLightRed = 91
	// FgLightGreen terminal color code
	FgLightGreen = 92
	// FgLightYellow terminal color code
	FgLightYellow = 93
	// FgLightBlue terminal color code
	FgLightBlue = 94
	// FgLightMagenta terminal color code
	FgLightMagenta = 95
	// FgLightCyan terminal color code
	FgLightCyan = 96
	// FgWhite terminal color code
	FgWhite = 97

	// BgNormal terminal color code
	BgNormal = 0
	// BgBoldOrBright terminal color code
	BgBoldOrBright = 1
	// BgDim terminal color code
	BgDim = 2
	// BgItalic terminal color code
	BgItalic = 3
	// BgUnderline terminal color code
	BgUnderline = 4
	// BgUlink terminal color code
	BgUlink = 5
	// BgInverse _
	BgInverse = 7
	// BgHidden terminal color code
	BgHidden = 8
	// BgStrikeout terminal color code
	BgStrikeout = 9

	// DarkColor terminal color code
	DarkColor = FgLightGray
)

Variables

View Source 
var (

	// CurrentHiddenColor the print color for left part of a hidden opt
	CurrentHiddenColor = FgDarkGray

	// CurrentDeprecatedColor the print color for deprecated opt line
	CurrentDeprecatedColor = FgDarkGray

	// CurrentDescColor the print color for description line
	CurrentDescColor = FgDarkGray
	// CurrentDefaultValueColor the print color for default value line
	CurrentDefaultValueColor = FgDarkGray
	// CurrentGroupTitleColor the print color for titles
	CurrentGroupTitleColor = DarkColor
)
View Source 
var (
	// ErrShouldBeStopException tips `Exec()` canceled the following actions after `PreAction()`
	ErrShouldBeStopException = SetAsAnIgnorableError(newErrorWithMsg("stop me right now"), true)

	// ErrNotImpl requests cmdr launch the internal default action (see defaultAction) after returning from user's action.
	//
	// There's 3 ways to make default impl: set action to nil; use envvar `FORCE_DEFAULT_ACTION=1`; return `cmdr.ErrNotImpl` in your action handler:
	//    “`go
	//    listCmd := cmdr.NewSubCmd().Titles("list", "ls").
	//    Description("list projects in .poi.yml").
	//    Action(func(cmd *cmdr.Command, args []string) (err error) {
	//    	err = cmdr.ErrNotImpl // notify caller fallback to defaultAction
	//    	return
	//    }).
	//    AttachTo(root)
	//    “`
	ErrNotImpl = errorsStd.New("not implements")

	// ErrBadArg is a generic error for user
	ErrBadArg = newErrorWithMsg("bad argument")
)
View Source 
var AllLevels = []Level{
	PanicLevel,
	FatalLevel,
	ErrorLevel,
	WarnLevel,
	InfoLevel,
	DebugLevel,
	TraceLevel,
	OffLevel,
}

AllLevels is a constant exposing all logging levels

View Source 
var Logger = log.NewDummyLogger()

Logger for cmdr

Functions

func AddOnConfigLoadedListener 

func AddOnConfigLoadedListener(c ConfigReloaded)

AddOnConfigLoadedListener adds a functor on config loaded and merged

func AsJSON added in v1.1.1 

func AsJSON() (b []byte)

AsJSON returns a json string bytes about all options

func AsJSONExt added in v1.6.13 

func AsJSONExt(prettyFormat bool) (b []byte, err error)

AsJSONExt returns a json string bytes about all options

func AsToml added in v1.1.1 

func AsToml() (b []byte)

AsToml returns a toml string bytes about all options

func AsTomlExt added in v1.6.13 

func AsTomlExt() (b []byte, err error)

AsTomlExt returns a toml string bytes about all options

func AsYaml added in v1.1.1 

func AsYaml() (b []byte)

AsYaml returns a yaml string bytes about all options

func AsYamlExt added in v1.6.13 

func AsYamlExt() (b []byte, err error)

AsYamlExt returns a yaml string bytes about all options Indent with 2 spaces

func AttachLiveArgsTo added in v1.10.27 

func AttachLiveArgsTo(err error, liveArgs ...interface{}) error

AttachLiveArgsTo wraps liveArgs into err if it's a *ErrorForCmdr as a container.

func CheckpointSize added in v1.10.0 

func CheckpointSize() int

CheckpointSize returns how many snapshots made see also SaveCheckpoint

func ClearCheckpoints added in v1.10.0 

func ClearCheckpoints()

ClearCheckpoints removes all checkpoints from snapshot history see also SaveCheckpoint

func Clone added in v0.2.3 

func Clone(from, to typ.Any) typ.Any

Clone deep-copy from to

func DebugOutputTildeInfo added in v1.9.8 

func DebugOutputTildeInfo(showType bool)

DebugOutputTildeInfo prints debug information like `~~debug`

func DeleteKey added in v1.6.3 

func DeleteKey(key string)

DeleteKey deletes a key from cmdr options store

func DottedPathToCommandOrFlag added in v1.10.0 

func DottedPathToCommandOrFlag(dottedPath string, anyCmd *Command) (cc *Command, ff *Flag)

DottedPathToCommandOrFlag searches the matched Command or Flag with the specified dotted-path. The searching will start from root if anyCmd is nil.

func DumpAsString 

func DumpAsString() (str string)

DumpAsString for debugging.

func EnableShellPager added in v1.7.27 

func EnableShellPager(enabled bool)

EnableShellPager transfer cmdr stdout to OS pager. The environment variable `PAGER` will be checkout, otherwise `less`.

func Exec 

func Exec(rootCmd *RootCommand, opts ...ExecOption) (err error)

Exec is main entry of `cmdr`.

func Get 

func Get(key string) interface{}

Get returns the generic value of an `Option` key with WrapWithRxxtPrefix. Such as: ```golang cmdr.Get("app.logger.level") => 'DEBUG',... ```

func GetAlterConfigWriteBackMode added in v1.10.13 

func GetAlterConfigWriteBackMode() bool

GetAlterConfigWriteBackMode return the state of writeBackAlterConfigs

func GetBool 

func GetBool(key string, defaultVal ...bool) bool

GetBool returns the bool value of an `Option` key. Such as: ```golang cmdr.GetBool("app.logger.enable", false) => true,... ```

func GetBoolP added in v0.2.3 

func GetBoolP(prefix, key string, defaultVal ...bool) bool

GetBoolP returns the bool value of an `Option` key. Such as: ```golang cmdr.GetBoolP("app.logger", "enable", false) => true,... ```

func GetBoolR added in v0.2.23 

func GetBoolR(key string, defaultVal ...bool) bool

GetBoolR returns the bool value of an `Option` key with WrapWithRxxtPrefix. Such as: ```golang cmdr.GetBoolR("logger.enable", false) => true,... ```

func GetBoolRP added in v0.2.23 

func GetBoolRP(prefix, key string, defaultVal ...bool) bool

GetBoolRP returns the bool value of an `Option` key with WrapWithRxxtPrefix. Such as: ```golang cmdr.GetBoolRP("logger", "enable", false) => true,... ```

func GetComplex128 added in v1.6.21 

func GetComplex128(key string, defaultVal ...complex128) complex128

GetComplex128 returns the complex128 value of an `Option` key.

func GetComplex128P added in v1.6.21 

func GetComplex128P(prefix, key string, defaultVal ...complex128) complex128

GetComplex128P returns the complex128 value of an `Option` key.

func GetComplex128R added in v1.6.21 

func GetComplex128R(key string, defaultVal ...complex128) complex128

GetComplex128R returns the complex128 value of an `Option` key with WrapWithRxxtPrefix.

func GetComplex128RP added in v1.6.21 

func GetComplex128RP(prefix, key string, defaultVal ...complex128) complex128

GetComplex128RP returns the complex128 value of an `Option` key with WrapWithRxxtPrefix.

func GetComplex64 added in v1.6.21 

func GetComplex64(key string, defaultVal ...complex64) complex64

GetComplex64 returns the complex64 value of an `Option` key.

func GetComplex64P added in v1.6.21 

func GetComplex64P(prefix, key string, defaultVal ...complex64) complex64

GetComplex64P returns the complex64 value of an `Option` key.

func GetComplex64R added in v1.6.21 

func GetComplex64R(key string, defaultVal ...complex64) complex64

GetComplex64R returns the complex64 value of an `Option` key with WrapWithRxxtPrefix.

func GetComplex64RP added in v1.6.21 

func GetComplex64RP(prefix, key string, defaultVal ...complex64) complex64

GetComplex64RP returns the complex64 value of an `Option` key with WrapWithRxxtPrefix.

func GetDebugMode added in v0.2.5 

func GetDebugMode() bool

GetDebugMode returns the flag value of `--debug`/`-D`

NOTE 

log.GetDebugMode()/SetDebugMode() have higher universality

the flag value of `--debug` or `-D` is always stored in cmdr Option Store, so you can retrieved it by GetBoolR("debug") and set it by Set("debug", true). You could also set it with SetDebugMode(b bool).

func GetDebugModeHitCount added in v1.10.0 

func GetDebugModeHitCount() int

GetDebugModeHitCount returns how many times `--debug`/`-D` specified

func GetDuration added in v0.2.19 

func GetDuration(key string, defaultVal ...time.Duration) time.Duration

GetDuration returns the int slice value of an `Option` key.

func GetDurationP added in v0.2.19 

func GetDurationP(prefix, key string, defaultVal ...time.Duration) time.Duration

GetDurationP returns the int slice value of an `Option` key.

func GetDurationR added in v1.0.0 

func GetDurationR(key string, defaultVal ...time.Duration) time.Duration

GetDurationR returns the int slice value of an `Option` key.

func GetDurationRP added in v1.0.0 

func GetDurationRP(prefix, key string, defaultVal ...time.Duration) time.Duration

GetDurationRP returns the int slice value of an `Option` key.

func GetFlagHitCount added in v1.10.0 

func GetFlagHitCount(longName string) int

GetFlagHitCount return how manu times a top-level Flag was specified from command-line.

func GetFlagHitCountRecursively added in v1.10.0 

func GetFlagHitCountRecursively(longName string) int

GetFlagHitCountRecursively return how manu times a Flag was specified from command-line. longName will be search recursively.

func GetFloat32 added in v1.0.1 

func GetFloat32(key string, defaultVal ...float32) float32

GetFloat32 returns the float32 value of an `Option` key.

func GetFloat32P added in v1.0.1 

func GetFloat32P(prefix, key string, defaultVal ...float32) float32

GetFloat32P returns the float32 value of an `Option` key.

func GetFloat32R added in v1.0.1 

func GetFloat32R(key string, defaultVal ...float32) float32

GetFloat32R returns the float32 value of an `Option` key with WrapWithRxxtPrefix.

func GetFloat32RP added in v1.0.1 

func GetFloat32RP(prefix, key string, defaultVal ...float32) float32

GetFloat32RP returns the float32 value of an `Option` key with WrapWithRxxtPrefix.

func GetFloat64 added in v1.0.1 

func GetFloat64(key string, defaultVal ...float64) float64

GetFloat64 returns the float64 value of an `Option` key.

func GetFloat64P added in v1.0.1 

func GetFloat64P(prefix, key string, defaultVal ...float64) float64

GetFloat64P returns the float64 value of an `Option` key.

func GetFloat64R added in v1.0.1 

func GetFloat64R(key string, defaultVal ...float64) float64

GetFloat64R returns the float64 value of an `Option` key with WrapWithRxxtPrefix.

func GetFloat64RP added in v1.0.1 

func GetFloat64RP(prefix, key string, defaultVal ...float64) float64

GetFloat64RP returns the float64 value of an `Option` key with WrapWithRxxtPrefix.

func GetHierarchyList added in v1.1.1 

func GetHierarchyList() map[string]interface{}

GetHierarchyList returns the hierarchy data

func GetHitCountByDottedPath added in v1.10.0 

func GetHitCountByDottedPath(dottedPath string) int

GetHitCountByDottedPath return how manu times a Flag or a Command was specified from command-line.

func GetInt 

func GetInt(key string, defaultVal ...int) int

GetInt returns the int value of an `Option` key.

func GetInt64 added in v0.2.3 

func GetInt64(key string, defaultVal ...int64) int64

GetInt64 returns the int64 value of an `Option` key.

func GetInt64P added in v0.2.3 

func GetInt64P(prefix, key string, defaultVal ...int64) int64

GetInt64P returns the int64 value of an `Option` key.

func GetInt64R added in v0.2.23 

func GetInt64R(key string, defaultVal ...int64) int64

GetInt64R returns the int64 value of an `Option` key with WrapWithRxxtPrefix.

func GetInt64RP added in v0.2.23 

func GetInt64RP(prefix, key string, defaultVal ...int64) int64

GetInt64RP returns the int64 value of an `Option` key with WrapWithRxxtPrefix.

func GetInt64Slice added in v1.6.3 

func GetInt64Slice(key string, defaultVal ...int64) []int64

GetInt64Slice returns the int slice value of an `Option` key.

func GetInt64SliceP added in v1.6.3 

func GetInt64SliceP(prefix, key string, defaultVal ...int64) []int64

GetInt64SliceP returns the int slice value of an `Option` key.

func GetInt64SliceR added in v1.6.3 

func GetInt64SliceR(key string, defaultVal ...int64) []int64

GetInt64SliceR returns the int slice value of an `Option` key with WrapWithRxxtPrefix.

func GetInt64SliceRP added in v1.6.3 

func GetInt64SliceRP(prefix, key string, defaultVal ...int64) []int64

GetInt64SliceRP returns the int slice value of an `Option` key with WrapWithRxxtPrefix.

func GetIntP added in v0.2.3 

func GetIntP(prefix, key string, defaultVal ...int) int

GetIntP returns the int value of an `Option` key.

func GetIntR added in v0.2.23 

func GetIntR(key string, defaultVal ...int) int

GetIntR returns the int value of an `Option` key with WrapWithRxxtPrefix.

func GetIntRP added in v0.2.23 

func GetIntRP(prefix, key string, defaultVal ...int) int

GetIntRP returns the int value of an `Option` key with WrapWithRxxtPrefix.

func GetIntSlice added in v0.2.19 

func GetIntSlice(key string, defaultVal ...int) []int

GetIntSlice returns the int slice value of an `Option` key.

func GetIntSliceP added in v0.2.19 

func GetIntSliceP(prefix, key string, defaultVal ...int) []int

GetIntSliceP returns the int slice value of an `Option` key.

func GetIntSliceR added in v0.2.23 

func GetIntSliceR(key string, defaultVal ...int) []int

GetIntSliceR returns the int slice value of an `Option` key with WrapWithRxxtPrefix.

func GetIntSliceRP added in v0.2.23 

func GetIntSliceRP(prefix, key string, defaultVal ...int) []int

GetIntSliceRP returns the int slice value of an `Option` key with WrapWithRxxtPrefix.

func GetKibibytes added in v1.6.19 

func GetKibibytes(key string, defaultVal ...uint64) uint64

GetKibibytes returns the uint64 value of an `Option` key.

kibibyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kibibyte is based 1024. That means: 1 KiB = 1k = 1024 bytes

See also: https://en.wikipedia.org/wiki/Kibibyte Its related word is kilobyte, refer to: https://en.wikipedia.org/wiki/Kilobyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKibibytesP added in v1.6.19 

func GetKibibytesP(prefix, key string, defaultVal ...uint64) uint64

GetKibibytesP returns the uint64 value of an `Option` key.

kibibyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kibibyte is based 1024. That means: 1 KiB = 1k = 1024 bytes

See also: https://en.wikipedia.org/wiki/Kibibyte Its related word is kilobyte, refer to: https://en.wikipedia.org/wiki/Kilobyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKibibytesR added in v1.6.19 

func GetKibibytesR(key string, defaultVal ...uint64) uint64

GetKibibytesR returns the uint64 value of an `Option` key with WrapWithRxxtPrefix.

kibibyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kibibyte is based 1024. That means: 1 KiB = 1k = 1024 bytes

See also: https://en.wikipedia.org/wiki/Kibibyte Its related word is kilobyte, refer to: https://en.wikipedia.org/wiki/Kilobyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKibibytesRP added in v1.6.19 

func GetKibibytesRP(prefix, key string, defaultVal ...uint64) uint64

GetKibibytesRP returns the uint64 value of an `Option` key with WrapWithRxxtPrefix.

kibibyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kibibyte is based 1024. That means: 1 KiB = 1k = 1024 bytes

See also: https://en.wikipedia.org/wiki/Kibibyte Its related word is kilobyte, refer to: https://en.wikipedia.org/wiki/Kilobyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKilobytes added in v1.6.19 

func GetKilobytes(key string, defaultVal ...uint64) uint64

GetKilobytes returns the uint64 value of an `Option` key.

kilobyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kilobyte is based 1000. That means: 1 KB = 1k = 1000 bytes

See also: https://en.wikipedia.org/wiki/Kilobyte Its related word is kibibyte, refer to: https://en.wikipedia.org/wiki/Kibibyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKilobytesP added in v1.6.19 

func GetKilobytesP(prefix, key string, defaultVal ...uint64) uint64

GetKilobytesP returns the uint64 value of an `Option` key.

kilobyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kilobyte is based 1000. That means: 1 KB = 1k = 1000 bytes

See also: https://en.wikipedia.org/wiki/Kilobyte Its related word is kibibyte, refer to: https://en.wikipedia.org/wiki/Kibibyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKilobytesR added in v1.6.19 

func GetKilobytesR(key string, defaultVal ...uint64) uint64

GetKilobytesR returns the uint64 value of an `Option` key with WrapWithRxxtPrefix.

kilobyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kilobyte is based 1000. That means: 1 KB = 1k = 1000 bytes

See also: https://en.wikipedia.org/wiki/Kilobyte Its related word is kibibyte, refer to: https://en.wikipedia.org/wiki/Kibibyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetKilobytesRP added in v1.6.19 

func GetKilobytesRP(prefix, key string, defaultVal ...uint64) uint64

GetKilobytesRP returns the uint64 value of an `Option` key with WrapWithRxxtPrefix.

kilobyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kilobyte is based 1000. That means: 1 KB = 1k = 1000 bytes

See also: https://en.wikipedia.org/wiki/Kilobyte Its related word is kibibyte, refer to: https://en.wikipedia.org/wiki/Kibibyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func GetMap added in v1.0.0 

func GetMap(key string) map[string]interface{}

GetMap an `Option` by key string, it returns a hierarchy map or nil

func GetMapR added in v1.0.0 

func GetMapR(key string) map[string]interface{}

GetMapR an `Option` by key string with WrapWithRxxtPrefix, it returns a hierarchy map or nil

func GetNoColorMode added in v1.6.3 

func GetNoColorMode() bool

GetNoColorMode return the flag value of `--no-color`/`-nc`

func GetNoColorModeHitCount added in v1.10.0 

func GetNoColorModeHitCount() int

GetNoColorModeHitCount returns how many times `--no-color`/`-nc` specified

func GetPredefinedAlterLocations added in v1.10.8 

func GetPredefinedAlterLocations() []string

GetPredefinedAlterLocations return the alternative searching locations. The alter config file will be merged into main config store after secondary config merged. The most different things are the alter config file can be written back when cmdr

func GetPredefinedLocations added in v0.2.5 

func GetPredefinedLocations() []string

GetPredefinedLocations return the primary searching locations for loading the main config files. cmdr finds these location to create the main config store.

func GetQuietMode added in v0.2.5 

func GetQuietMode() bool

GetQuietMode returns the flag value of `--quiet`/`-q`

func GetQuietModeHitCount added in v1.10.0 

func GetQuietModeHitCount() int

GetQuietModeHitCount returns how many times `--quiet`/`-q` specified

func GetR added in v0.2.23 

func GetR(key string) interface{}

GetR returns the generic value of an `Option` key with WrapWithRxxtPrefix. Such as: ```golang cmdr.GetR("logger.level") => 'DEBUG',... ```

func GetRemainArgs added in v1.7.27 

func GetRemainArgs() []string

GetRemainArgs returns the remain arguments after command line parsed

func GetSecondaryLocations added in v1.10.9 

func GetSecondaryLocations() []string

GetSecondaryLocations return the secondary searching locations, and these configs will be merged into main config store.

func GetSectionFrom added in v1.0.1 

func GetSectionFrom(sectionKeyPath string, holder interface{}) (err error)

GetSectionFrom returns error while cannot yaml Marshal and Unmarshal `cmdr.GetSectionFrom(sectionKeyPath, &holder)` could load all sub-tree nodes from sectionKeyPath and transform them into holder structure, such as: ```go 

type ServerConfig struct {
  Port int
  HttpMode int
  EnableTls bool
}
var serverConfig = new(ServerConfig)
cmdr.GetSectionFrom("server", &serverConfig)
assert serverConfig.Port == 7100

```

func GetStrictMode added in v0.2.5 

func GetStrictMode() bool

GetStrictMode enables error when opt value missed. such as: xxx a b --prefix” => error: prefix opt has no value specified. xxx a b --prefix'/' => ok.

ENV: use `CMDR_APP_STRICT_MODE=true` to enable strict-mode. NOTE: `CMDR_APP_` prefix could be set by user (via: `EnvPrefix` && `RxxtPrefix`).

the flag value of `--strict-mode`.

func GetString 

func GetString(key string, defaultVal ...string) string

GetString returns the string value of an `Option` key.

func GetStringNoExpand added in v1.6.7 

func GetStringNoExpand(key string, defaultVal ...string) string

GetStringNoExpand returns the string value of an `Option` key.

func GetStringNoExpandP added in v1.6.7 

func GetStringNoExpandP(prefix, key string, defaultVal ...string) string

GetStringNoExpandP returns the string value of an `Option` key.

func GetStringNoExpandR added in v1.6.7 

func GetStringNoExpandR(key string, defaultVal ...string) string

GetStringNoExpandR returns the string value of an `Option` key with WrapWithRxxtPrefix.

func GetStringNoExpandRP added in v1.6.7 

func GetStringNoExpandRP(prefix, key string, defaultVal ...string) string

GetStringNoExpandRP returns the string value of an `Option` key with WrapWithRxxtPrefix.

func GetStringP added in v0.2.3 

func GetStringP(prefix, key string, defaultVal ...string) string

GetStringP returns the string value of an `Option` key.

func GetStringR added in v0.2.23 

func GetStringR(key string, defaultVal ...string) string

GetStringR returns the string value of an `Option` key with WrapWithRxxtPrefix.

func GetStringRP added in v0.2.23 

func GetStringRP(prefix, key string, defaultVal ...string) string

GetStringRP returns the string value of an `Option` key with WrapWithRxxtPrefix.

func GetStringSlice 

func GetStringSlice(key string, defaultVal ...string) []string

GetStringSlice returns the string slice value of an `Option` key.

func GetStringSliceP added in v0.2.3 

func GetStringSliceP(prefix, key string, defaultVal ...string) []string

GetStringSliceP returns the string slice value of an `Option` key.

func GetStringSliceR added in v0.2.23 

func GetStringSliceR(key string, defaultVal ...string) []string

GetStringSliceR returns the string slice value of an `Option` key with WrapWithRxxtPrefix.

func GetStringSliceRP added in v0.2.23 

func GetStringSliceRP(prefix, key string, defaultVal ...string) []string

GetStringSliceRP returns the string slice value of an `Option` key with WrapWithRxxtPrefix.

func GetTraceMode added in v1.7.0 

func GetTraceMode() bool

GetTraceMode returns the flag value of `--trace`/`-tr`

NOTE 

log.GetTraceMode()/SetTraceMode() have higher universality

the flag value of `--trace` or `-tr` is always stored in cmdr Option Store, so you can retrieved it by GetBoolR("trace") and set it by Set("trace", true). You could also set it with SetTraceMode(b bool).

The `--trace` is not enabled in default, so you have to add it manually: 

import "github.com/hedzr/cmdr-addons/pkg/plugins/trace"
cmdr.Exec(buildRootCmd(),
    trace.WithTraceEnable(true),
)

func GetTraceModeHitCount added in v1.10.0 

func GetTraceModeHitCount() int

GetTraceModeHitCount returns how many times `--trace`/`-tr` specified

func GetUint added in v0.2.3 

func GetUint(key string, defaultVal ...uint) uint

GetUint returns the uint value of an `Option` key.

func GetUint64 added in v0.2.3 

func GetUint64(key string, defaultVal ...uint64) uint64

GetUint64 returns the uint64 value of an `Option` key.

func GetUint64P added in v0.2.3 

func GetUint64P(prefix, key string, defaultVal ...uint64) uint64

GetUint64P returns the uint64 value of an `Option` key.

func GetUint64R added in v0.2.23 

func GetUint64R(key string, defaultVal ...uint64) uint64

GetUint64R returns the uint64 value of an `Option` key with WrapWithRxxtPrefix.

func GetUint64RP added in v0.2.23 

func GetUint64RP(prefix, key string, defaultVal ...uint64) uint64

GetUint64RP returns the uint64 value of an `Option` key with WrapWithRxxtPrefix.

func GetUint64Slice added in v1.6.3 

func GetUint64Slice(key string, defaultVal ...uint64) []uint64

GetUint64Slice returns the int slice value of an `Option` key.

func GetUint64SliceP added in v1.6.3 

func GetUint64SliceP(prefix, key string, defaultVal ...uint64) []uint64

GetUint64SliceP returns the int slice value of an `Option` key.

func GetUint64SliceR added in v1.6.3 

func GetUint64SliceR(key string, defaultVal ...uint64) []uint64

GetUint64SliceR returns the int slice value of an `Option` key with WrapWithRxxtPrefix.

func GetUint64SliceRP added in v1.6.3 

func GetUint64SliceRP(prefix, key string, defaultVal ...uint64) []uint64

GetUint64SliceRP returns the int slice value of an `Option` key with WrapWithRxxtPrefix.

func GetUintP added in v0.2.3 

func GetUintP(prefix, key string, defaultVal ...uint) uint

GetUintP returns the uint value of an `Option` key.

func GetUintR added in v0.2.23 

func GetUintR(key string, defaultVal ...uint) uint

GetUintR returns the uint value of an `Option` key with WrapWithRxxtPrefix.

func GetUintRP added in v0.2.23 

func GetUintRP(prefix, key string, defaultVal ...uint) uint

GetUintRP returns the uint value of an `Option` key with WrapWithRxxtPrefix.

func GetUsedAlterConfigFile added in v1.10.8 

func GetUsedAlterConfigFile() string

GetUsedAlterConfigFile returns the alternative config filename

func GetUsedConfigFile added in v0.2.3 

func GetUsedConfigFile() string

GetUsedConfigFile returns the main config filename (generally it's `<appname>.yml`)

func GetUsedConfigSubDir added in v0.2.3 

func GetUsedConfigSubDir() string

GetUsedConfigSubDir returns the sub-directory `conf.d` of config files. Note that it be always normalized now. Sometimes it might be empty string ("") if `conf.d` have not been found.

func GetUsedSecondaryConfigFile added in v1.10.9 

func GetUsedSecondaryConfigFile() string

GetUsedSecondaryConfigFile returns the secondary config filename

func GetUsedSecondaryConfigSubDir added in v1.10.9 

func GetUsedSecondaryConfigSubDir() string

GetUsedSecondaryConfigSubDir returns the subdirectory `conf.d` of secondary config files.

func GetUsingConfigFiles added in v1.6.9 

func GetUsingConfigFiles() []string

GetUsingConfigFiles returns all loaded config files, includes the main config file and children in sub-directory `conf.d`.

func GetVerboseMode added in v0.2.5 

func GetVerboseMode() bool

GetVerboseMode returns the flag value of `--verbose`/`-v`

func GetVerboseModeHitCount added in v1.10.0 

func GetVerboseModeHitCount() int

GetVerboseModeHitCount returns how many times `--verbose`/`-v` specified

func GetWatchingConfigFiles added in v1.7.31 

func GetWatchingConfigFiles() []string

GetWatchingConfigFiles returns all config files being watched.

func HasKey added in v1.6.3 

func HasKey(key string) (ok bool)

HasKey detects whether a key exists in cmdr options store or not

func InDevelopingTime added in v1.7.28 

func InDevelopingTime() (status bool)

InDevelopingTime detects whether is in developing time.

If the main program has been built as a executable binary, we would assumed which is not in developing time. If GetDebugMode() is true, that's in developing time too.

func InTesting added in v0.2.19 

func InTesting() bool

func InvokeCommand added in v1.10.1 

func InvokeCommand(dottedCommandPath string, extraArgs ...string) (err error)

InvokeCommand invokes a sub-command internally.

func IsIgnorableError added in v1.10.27 

func IsIgnorableError(err error) bool

IsIgnorableError tests if an error is a *ErrorForCmdr and its Ignorable field is true

func LoadConfigFile 

func LoadConfigFile(file string) (mainFile, subDir string, err error)

LoadConfigFile loads a yaml config file and merge the settings into `rxxtOptions` and load files in the `conf.d` child directory too.

func MergeWith added in v1.1.4 

func MergeWith(m map[string]interface{}) (err error)

MergeWith will merge a map into Option Store recursively. You could merge a yaml/json/toml options into cmdr Hierarchy Options.

func NewErrorForCmdr added in v1.10.27 

func NewErrorForCmdr(msg string, args ...interface{}) error

NewErrorForCmdr creates a *ErrorForCmdr object with ignorable field supports.

For examples: 

err := cmdr.NewErrorForCmdr("error here")
cmdr.SetAsAnIgnorableError(err, true)
if cmdr.IsIgnorable(err) {
    // do jump out and ignore it
}

func NewLoggerConfig added in v1.7.2 

func NewLoggerConfig() *log.LoggerConfig

NewLoggerConfig returns a default LoggerConfig

func NewLoggerConfigWith added in v1.7.28 

func NewLoggerConfigWith(enabled bool, backend, level string) *log.LoggerConfig

NewLoggerConfigWith returns a default LoggerConfig

func Parsed added in v1.11.11 

func Parsed() bool

func PartialContains added in v1.11.5 

func PartialContains(names []string, partialNeedle string) (index int, matched string, contains bool)

PartialContains checks if one of names has partialNeedle as a part.

func RemoveAllOnConfigLoadedListeners added in v1.11.11 

func RemoveAllOnConfigLoadedListeners()

RemoveAllOnConfigLoadedListeners remove a functor on config loaded and merged

func RemoveOnConfigLoadedListener 

func RemoveOnConfigLoadedListener(c ConfigReloaded)

RemoveOnConfigLoadedListener remove a functor on config loaded and merged

func ResetOptions added in v0.2.19 

func ResetOptions()

ResetOptions to reset the current `Options Store`, so that you could follow a `LoadConfigFile()` with it.

func RestoreCheckpoint added in v1.10.0 

func RestoreCheckpoint(n ...int) (err error)

RestoreCheckpoint restore 1 or n checkpoint(s) from snapshots history. see also SaveCheckpoint

func SaveAsJSON added in v0.2.17 

func SaveAsJSON(filename string) (err error)

SaveAsJSON to Save all config entries as a json file

func SaveAsJSONExt added in v1.10.19 

func SaveAsJSONExt(filename string, prettyFormat bool) (err error)

SaveAsJSONExt to Save all config entries as a json file

func SaveAsToml added in v0.2.17 

func SaveAsToml(filename string) (err error)

SaveAsToml to Save all config entries as a toml file

func SaveAsYaml added in v0.2.17 

func SaveAsYaml(filename string) (err error)

SaveAsYaml to Save all config entries as a yaml file

func SaveCheckpoint added in v1.10.0 

func SaveCheckpoint() (err error)

SaveCheckpoint make a snapshot of the current Option Store

You may ResetOptions after SaveCheckpoint: 

func x(aMap map[string]interface{}){
    defer cmdr.RestoreCheckpoint()
    cmdr.SaveCheckpoint()
    cmdr.ResetOptions()
    cmdr.MergeWith(map[string]interface{}{
      "app": map[string]interface{}{
        conf.AppName: map[string]interface{}{
          "a-map": aMap,
        }
      }
    }
    cmdr.SaveAsYaml("a-setting.yml")
}

func SaveObjAsToml added in v0.2.19 

func SaveObjAsToml(obj interface{}, filename string) (err error)

SaveObjAsToml to Save an object as a toml file

func Set added in v0.2.3 

func Set(key string, val interface{})

Set sets the value of an `Option` key (with prefix auto-wrap). The key MUST not have an `app` prefix. eg: 

cmdr.Set("logger.level", "DEBUG")
cmdr.Set("ms.tags.port", 8500)
...
cmdr.Set("debug", true)
cmdr.GetBool("app.debug") => true

func SetAlterConfigWriteBackMode added in v1.10.13 

func SetAlterConfigWriteBackMode(enabled bool)

SetAlterConfigWriteBackMode enables writing the runtime changes back to alter config file, or disable it

func SetAsAnIgnorableError added in v1.10.27 

func SetAsAnIgnorableError(err error, ignorable bool) error

SetAsAnIgnorableError checks err is a *ErrorForCmdr object and set its Ignorable field.

func SetDebugMode added in v1.7.28 

func SetDebugMode(b bool)

SetDebugMode setup the debug mode status in Option Store

func SetLogger added in v1.7.11 

func SetLogger(l log.Logger)

SetLogger transfer an instance into log package-level value

func SetNoColorMode added in v1.11.11 

func SetNoColorMode(b bool)

func SetNx added in v0.2.3 

func SetNx(key string, val interface{})

SetNx but without prefix auto-wrapped. `rxxtPrefix` is a string slice to define the prefix string array, default is ["app"]. So, cmdr.Set("debug", true) will put a real entry with (`debug`, true).

func SetNxOverwrite added in v1.10.19 

func SetNxOverwrite(key string, val interface{})

SetNxOverwrite likes SetOverwrite but without prefix auto-wrapped. It replaces the old value on a slice, instead of the default append mode.

func SetOnConfigLoadedListener 

func SetOnConfigLoadedListener(c ConfigReloaded, enabled bool)

SetOnConfigLoadedListener enable/disable a functor on config loaded and merged

func SetOverwrite added in v1.10.19 

func SetOverwrite(key string, val interface{})

SetOverwrite sets the value of an `Option` key. The key MUST not have an `app` prefix. It replaces the old value on a slice, instead of the default append mode.

SetOverwrite(key, newSlice) will replace the original value with newSlice.

func SetQuietMode added in v1.11.11 

func SetQuietMode(b bool)

func SetRaw added in v1.9.4 

func SetRaw(key string, val interface{})

SetRaw but without prefix auto-wrapped. So, cmdr.SetRaw("debug", true) will put a real entry with (`debug`, true). 

cmdr.Set("debug", true)
cmdr.GetBool("debug") => true

func SetTraceMode added in v1.7.28 

func SetTraceMode(b bool)

SetTraceMode setup the tracing mode status in Option Store

func SetVerboseMode added in v1.11.11 

func SetVerboseMode(b bool)

func SignalQuitSignal added in v1.6.7 

func SignalQuitSignal()

SignalQuitSignal post a SIGQUIT signal to the current process

func SignalTermSignal added in v1.6.7 

func SignalTermSignal()

SignalTermSignal post a SIGTERM signal to the current process

func SignalToSelf added in v1.6.7 

func SignalToSelf(sig os.Signal) (err error)

SignalToSelf trigger the sig signal to the current process

func StripHTMLTags added in v1.10.19 

func StripHTMLTags(s string) string

StripHTMLTags aggressively strips HTML tags from a string. It will only keep anything between `>` and `<`.

func StripLeftTabs added in v1.10.19 

func StripLeftTabs(s string) string

StripLeftTabs strips the least left side tab chars from lines. StripLeftTabs strips html tags too.

func StripLeftTabsOnly added in v1.10.19 

func StripLeftTabsOnly(s string) string

StripLeftTabsOnly strips the least left side tab chars from lines.

func ToBool added in v1.6.45 

func ToBool(val interface{}, defaultVal ...bool) (ret bool)

ToBool translate a value to boolean

func TrapSignals added in v1.1.7 

func TrapSignals(onTrapped func(s os.Signal), signals ...os.Signal) (waiter func())

TrapSignals is a helper for simplify your infinite loop codes.

Usage 

 func enteringLoop() {
	  waiter := cmdr.TrapSignals(func(s os.Signal) {
	    cmdr.Logger.Debugf("receive signal '%v' in onTrapped()", s)
	  })
	  go waiter()
 }

func TrapSignalsEnh added in v1.6.7 

func TrapSignalsEnh(done chan bool, onTrapped func(s os.Signal), signals ...os.Signal) (waiter func())

TrapSignalsEnh is a helper for simplify your infinite loop codes.

Usage 

 func enteringLoop() {
   done := make(chan bool, 1)
   go func(done chan bool){
      // your main serve loop
      done <- true   // to end the TrapSignalsEnh waiter by manually, instead of os signals caught.
   }(done)
	  waiter := cmdr.TrapSignalsEnh(done, func(s os.Signal) {
	    cmdr.Logger.Debugf("receive signal '%v' in onTrapped()", s)
	  })
	  go waiter()
 }

func WalkAllCommands added in v0.2.9 

func WalkAllCommands(walk func(cmd *Command, index, level int) (err error)) (err error)

WalkAllCommands loops for all commands, starting from root.

func WrapWithRxxtPrefix added in v0.2.23 

func WrapWithRxxtPrefix(key string) string

WrapWithRxxtPrefix wrap an key with [RxxtPrefix], for [GetXxx(key)] and [GetXxxP(prefix,key)]

Types

type BaseOpt 

type BaseOpt struct {
	// Name is reserved for internal purpose.
	Name string `yaml:"name,omitempty" json:"name,omitempty"`
	// Short 'rune' string. short option/command name.
	// single char. example for flag: "a" -> "-a"
	Short string `yaml:"short-name,omitempty" json:"short-name,omitempty"`
	// Full is a full/long form flag/command title name.
	// word string. example for flag: "addr" -> "--addr"
	Full string `yaml:"title,omitempty" json:"title,omitempty"`
	// Aliases are the more synonyms
	Aliases []string `yaml:"aliases,flow,omitempty" json:"aliases,omitempty"`
	// Group specify a group name,
	// A special prefix could sort it, has a form like `[0-9a-zA-Z]+\.`.
	// The prefix will be removed from help screen.
	//
	// Some examples are:
	//    "A001.Host Params"
	//    "A002.User Params"
	//
	// If ToggleGroup specified, Group field can be omitted because we will copy
	// from there.
	Group string `yaml:"group,omitempty" json:"group,omitempty"`

	Description     string `yaml:"desc,omitempty" json:"desc,omitempty"`
	LongDescription string `yaml:"long-desc,omitempty" json:"long-desc,omitempty"`
	Examples        string `yaml:"examples,omitempty" json:"examples,omitempty"`
	Hidden          bool   `yaml:"hidden,omitempty" json:"hidden,omitempty"`
	VendorHidden    bool   `yaml:"vendor-hidden,omitempty" json:"vendor-hidden,omitempty"`

	// Deprecated is a version string just like '0.5.9' or 'v0.5.9', that
	// means this command/flag was/will be deprecated since `v0.5.9`.
	Deprecated string `yaml:"deprecated,omitempty" json:"deprecated,omitempty"`

	// Action is callback for the last recognized command/sub-command.
	// return: ErrShouldBeStopException will break the following flow and exit right now
	// cmd 是 flag 被识别时已经得到的子命令
	Action Handler `yaml:"-" json:"-"`
	// contains filtered or unexported fields
}

BaseOpt is base of `Command`, `Flag`

func (*BaseOpt) GetDescZsh 

func (s *BaseOpt) GetDescZsh() (desc string)

GetDescZsh temp

func (*BaseOpt) GetHitStr added in v1.10.27 

func (s *BaseOpt) GetHitStr() string

GetHitStr returns the matched command string

func (*BaseOpt) GetLongTitleNamesArray added in v0.2.3 

func (s *BaseOpt) GetLongTitleNamesArray() []string

GetLongTitleNamesArray returns long name and aliases as an array

func (*BaseOpt) GetShortTitleNamesArray added in v0.2.3 

func (s *BaseOpt) GetShortTitleNamesArray() []string

GetShortTitleNamesArray returns short name as an array

func (*BaseOpt) GetTitleName 

func (s *BaseOpt) GetTitleName() string

GetTitleName returns name/full/short string

func (*BaseOpt) GetTitleNames 

func (s *BaseOpt) GetTitleNames() string

GetTitleNames return the joint string of short,full,aliases names

func (*BaseOpt) GetTitleNamesArray 

func (s *BaseOpt) GetTitleNamesArray() []string

GetTitleNamesArray returns short,full,aliases names

func (*BaseOpt) GetTitleNamesArrayMainly added in v1.9.4 

func (s *BaseOpt) GetTitleNamesArrayMainly() []string

GetTitleNamesArrayMainly returns short,full names

func (*BaseOpt) GetTitleNamesBy 

func (s *BaseOpt) GetTitleNamesBy(delimChar string) string

GetTitleNamesBy returns the joint string of short,full,aliases names

func (*BaseOpt) GetTitleZshNames added in v1.9.4 

func (s *BaseOpt) GetTitleZshNames() string

GetTitleZshNames temp

func (*BaseOpt) GetTitleZshNamesBy added in v1.9.4 

func (s *BaseOpt) GetTitleZshNamesBy(delimChar string) (str string)

GetTitleZshNamesBy temp

func (*BaseOpt) HasParent added in v0.2.9 

func (s *BaseOpt) HasParent() bool

HasParent detects whether owner is available or not

type ColorTranslator added in v1.10.19 

type ColorTranslator interface {
	Translate(s string, initialFg int) string
}

ColorTranslator _

type Command 

type Command struct {
	BaseOpt `yaml:",inline"`

	Flags []*Flag `yaml:"flags,omitempty" json:"flags,omitempty"`

	SubCommands []*Command `yaml:"subcmds,omitempty" json:"subcmds,omitempty"`

	// return: ErrShouldBeStopException will break the following flow and exit right now
	PreAction Handler `yaml:"-" json:"-"`
	// PostAction will be run after Action() invoked.
	PostAction Invoker `yaml:"-" json:"-"`
	// TailPlaceHolder contains the description text of positional
	// arguments of a command.
	// It will be shown at tail of command usages line. Suppose there's
	// a TailPlaceHolder  with"<host-fqdn> <ipv4/6>", they will be
	// painted in help screen just like:
	//
	//     austr dns add <host-fqdn> <ipv4/6> [Options] [Parent/Global Options]
	//
	// Deprecated since v1.10.36+, use TailPlaceHolders is recommended
	TailPlaceHolder string `yaml:"tail-placeholder,omitempty" json:"tail-placeholder,omitempty"`
	// TailPlaceHolders gives two places to place the placeholders.
	// It looks like the following form:
	//
	//     austr dns add <placeholder1st> [Options] [Parent/Global Options] <placeholders more...>
	//
	// As shown, you may specify at:
	//
	// - before '[Options] [Parent/Global Options]'
	// - after '[Options] [Parent/Global Options]'
	//
	// In TailPlaceHolders slice, [0] is `placeholder1st“, and others
	// are `placeholders more“.
	//
	// Others:
	//   TailArgsText string [no plan]
	//   TailArgsDesc string [no plan]
	TailPlaceHolders []string ``

	// Invoke is a space-separated string which takes Command (name) and extra
	// remain args to be invoked.
	// It invokes a command from the command tree in this app.
	// Invoke field is available for
	Invoke string `yaml:"invoke,omitempty" json:"invoke,omitempty"`
	// InvokeProc is just for cmdr aliases commands
	// invoke the external commands (via: executable)
	InvokeProc string `yaml:"invoke-proc,omitempty" json:"invoke-proc,omitempty"`
	// InvokeShell is just for cmdr aliases commands
	// invoke the external commands (via: shell)
	InvokeShell string `yaml:"invoke-sh,omitempty" json:"invoke-sh,omitempty"`
	// Shell is just for cmdr aliases commands
	// invoke a command under this shell, or /usr/bin/env bash|zsh|...
	Shell string `yaml:"shell,omitempty" json:"shell,omitempty"`
	// contains filtered or unexported fields
}

Command holds the structure of commands and sub-commands

func DottedPathToCommand added in v1.10.0 

func DottedPathToCommand(dottedPath string, anyCmd *Command) (cc *Command)

DottedPathToCommand searches the matched Command with the specified dotted-path. The searching will start from root if anyCmd is nil.

func FindSubCommand added in v0.2.17 

func FindSubCommand(longName string, cmd *Command) (res *Command)

FindSubCommand find sub-command with `longName` from `cmd` if cmd == nil: finding from root command

func FindSubCommandRecursive added in v0.2.17 

func FindSubCommandRecursive(longName string, cmd *Command) (res *Command)

FindSubCommandRecursive find sub-command with `longName` from `cmd` recursively if cmd == nil: finding from root command

func GetHitCommands added in v1.10.27 

func GetHitCommands() []*Command

GetHitCommands returns all matched sub-commands from commandline

func MatchAndTest added in v1.10.19 

func MatchAndTest(inputCommandlineWithoutArg0 string, opts ...ExecOption) (last *Command, err error)

MatchAndTest _

func (*Command) Delete added in v1.10.0 

func (c *Command) Delete()

Delete removes myself from the command hierarchy system.

func (*Command) EqualTo added in v1.10.27 

func (c *Command) EqualTo(rh *Command) (ok bool)

EqualTo _

func (*Command) FindFlag added in v1.5.1 

func (c *Command) FindFlag(longName string) (res *Flag)

FindFlag find flag with `longName` from `cmd`

func (*Command) FindFlagRecursive added in v1.5.1 

func (c *Command) FindFlagRecursive(longName string) (res *Flag)

FindFlagRecursive find flag with `longName` from `cmd` recursively

func (*Command) FindSubCommand added in v1.5.1 

func (c *Command) FindSubCommand(longName string) (res *Command)

FindSubCommand find sub-command with `longName` from `cmd`

func (*Command) FindSubCommandRecursive added in v1.5.1 

func (c *Command) FindSubCommandRecursive(longName string) (res *Command)

FindSubCommandRecursive find sub-command with `longName` from `cmd` recursively

func (*Command) GetDottedNamePath added in v1.6.19 

func (c *Command) GetDottedNamePath() string

GetDottedNamePath return the dotted key path of this command in the options store. For example, the returned string just like: 'server.start'. NOTE that there is no OptiontPrefixes in this key path. For more information about Option Prefix, refer to WithOptionsPrefix

func (*Command) GetExpandableNames 

func (c *Command) GetExpandableNames() string

GetExpandableNames returns the names comma splitted string.

func (*Command) GetExpandableNamesArray 

func (c *Command) GetExpandableNamesArray() []string

GetExpandableNamesArray returns the names array of command, includes short name and long name.

func (*Command) GetName 

func (c *Command) GetName() string

GetName returns the name of a `Command`.

func (*Command) GetOwner added in v0.2.19 

func (c *Command) GetOwner() *Command

GetOwner returns the parent command object

func (*Command) GetParentName 

func (c *Command) GetParentName() string

GetParentName returns the owner command name

func (*Command) GetQuotedGroupName 

func (c *Command) GetQuotedGroupName() string

GetQuotedGroupName returns the group name quoted string.

func (*Command) GetRoot 

func (c *Command) GetRoot() *RootCommand

GetRoot returns the `RootCommand`

func (*Command) GetSubCommandNamesBy 

func (c *Command) GetSubCommandNamesBy(delimChar string) string

GetSubCommandNamesBy returns the joint string of subcommands

func (*Command) GetTriggeredTimes added in v1.10.0 

func (c *Command) GetTriggeredTimes() int

GetTriggeredTimes returns the matched times

func (*Command) IsRoot added in v0.2.9 

func (c *Command) IsRoot() bool

IsRoot returns true if this command is a RootCommand

func (*Command) Match added in v1.10.19 

func (c *Command) Match(title string) (ok bool)

Match matches title

func (*Command) PrintBuildInfo added in v1.5.0 

func (c *Command) PrintBuildInfo()

PrintBuildInfo print building information

func (*Command) PrintHelp 

func (c *Command) PrintHelp(justFlags bool)

PrintHelp prints help screen

func (*Command) PrintVersion 

func (c *Command) PrintVersion()

PrintVersion prints versions information

type ConfigReloaded 

type ConfigReloaded interface {
	OnConfigReloaded()
}

ConfigReloaded for config reloaded

type ErrorForCmdr added in v1.0.2 

type ErrorForCmdr struct {
	Ignorable bool
	// contains filtered or unexported fields
}

ErrorForCmdr structure

func UnwrapError added in v1.10.27 

func UnwrapError(err error) (e *ErrorForCmdr, ignorable, ok bool)

UnwrapError try extracting the *ErrorForCmdr object from a given error object even if it'd been wrapped deeply.

func UnwrapLiveArgsFromCmdrError added in v1.10.27 

func UnwrapLiveArgsFromCmdrError(err error) (liveArgs []interface{}, e *ErrorForCmdr, ok bool)

UnwrapLiveArgsFromCmdrError try extracting the *ErrorForCmdr object from a given error object, and return the liveArgs field for usages.

func (*ErrorForCmdr) As added in v1.6.21 

func (w *ErrorForCmdr) As(target interface{}) bool

As finds the first error in err's chain that matches target, and if so, sets target to that error value and returns true.

func (*ErrorForCmdr) Attach added in v1.6.9 

func (w *ErrorForCmdr) Attach(errs ...error)

Attach appends errs. For ErrorForCmdr, only one last error will be kept.

func (*ErrorForCmdr) Cause added in v1.6.21 

func (w *ErrorForCmdr) Cause() error

Cause returns the underlying cause of the error recursively, if possible.

func (*ErrorForCmdr) Error added in v1.0.2 

func (w *ErrorForCmdr) Error() string

func (*ErrorForCmdr) FormatNew added in v1.6.21 

func (w *ErrorForCmdr) FormatNew(ignorable bool, livedArgs ...interface{}) *errors.WithStackInfo

FormatNew creates a new error object based on this error template 'w'.

Example: 

errTmpl1001 := BUG1001.NewTemplate("something is wrong %v")
err4 := errTmpl1001.FormatNew("ok").Attach(errBug1)
fmt.Println(err4)
fmt.Printf("%+v\n", err4)

func (*ErrorForCmdr) Is added in v1.6.21 

func (w *ErrorForCmdr) Is(target error) bool

Is reports whether any error in err's chain matches target.

func (*ErrorForCmdr) Unwrap added in v1.6.21 

func (w *ErrorForCmdr) Unwrap() error

Unwrap returns the result of calling the Unwrap method on err, if err's type contains an Unwrap method returning error. Otherwise, Unwrap returns nil.

type ExecOption added in v1.5.0 

type ExecOption func(w *ExecWorker)

ExecOption is the functional option for Exec()

func WithAfterArgsParsed added in v1.6.3 

func WithAfterArgsParsed(hookFunc Handler) ExecOption

WithAfterArgsParsed sets a callback point after command-line args parsed by cmdr internal exec().

Your callback func will be invoked before invoking the matched command `cmd`. At this time, all command-line args parsed and a command found.

If program was launched with empty or wrong arguments, your callback func won't be triggered.

When empty argument or `--help` found, cmdr will display help screen. To customize it see also cmdr.WithCustomShowVersion and cmdr.WithCustomShowBuildInfo.

When any wrong/warn arguments found, cmdr will display some tip messages. To customize it see also cmdr.WithUnknownOptionHandler.

func WithAlterConfigAutoWriteBack added in v1.10.13 

func WithAlterConfigAutoWriteBack(writeChanges bool) ExecOption

WithAlterConfigAutoWriteBack enables writing the runtime changes back to alter config file.

func WithAlterLocations added in v1.7.37 

func WithAlterLocations(locations ...string) ExecOption

WithAlterLocations sets the alter config file locations.

Default is: 

alterLocations: []string{
    "/ci/etc/$APPNAME/alter/$APPNAME.yml",
    "/etc/$APPNAME/alter/$APPNAME.yml",
    "/usr/local/etc/$APPNAME/alter/$APPNAME.yml",
    "./bin/$APPNAME.yml",              // for developer, current bin directory
    "/var/lib/$APPNAME/.$APPNAME.yml", //
    "$THIS/.$APPNAME.yml",             // executable's directory
},

NOTE that just one config file will be loaded, the child `conf.d` folder not supports.

cmdr will SAVE the changes in this alter config file automatically once loaded.

func WithAutomaticEnvHooks added in v1.5.1 

func WithAutomaticEnvHooks(hook HookOptsFunc) ExecOption

WithAutomaticEnvHooks sets the hook after building automatic environment.

At this point, you could override the option default values.

func WithBuiltinCommands added in v1.5.0 

func WithBuiltinCommands(versionsCmds, helpCmds, verboseCmds, generateCmds, generalCmdrCmds bool) ExecOption

WithBuiltinCommands enables/disables those builtin predefined commands. Such as:

  • versionsCmds / EnableVersionCommands supports injecting the default `--version` flags and commands
  • helpCmds / EnableHelpCommands supports injecting the default `--help` flags and commands
  • verboseCmds / EnableVerboseCommands supports injecting the default `--verbose` flags and commands
  • generalCmdrCmds / EnableCmdrCommands support these flags: `--strict-mode`, `--no-env-overrides`, and `--no-color`
  • generateCmds / EnableGenerateCommands supports injecting the default `generate` commands and sub-commands

func WithCommandSystemCustomizing added in v1.10.0 

func WithCommandSystemCustomizing(customizer HookFunc) ExecOption

WithCommandSystemCustomizing provides a shortcut to allow plugin/addon can customize the whole command/sub-command hierarchy structure.

For example, suppose you're planning to hide the 'generate' internal command from help screen: 

opt := cmdr.WithCommandSystemCustomizing(
  func(root *cmdr.RootCommand, args []string) {
    root.FindSubCommand("generate").Delete()
  })
opts := append(opts, opt)
err := cmdr.Exec(buildMyCommands(), opts...)

And, you may attach more sub-commands into the current command system from your plugin/addon: 

func WithColorTableCommand(dottedCommand ...string) cmdr.ExecOption {
    return cmdr.WithCommandSystemCustomizing(
      func(root *cmdr.RootCommand, args []string) {
        cmd := &root.Command
        for _, d := range dottedCommand {
          cmd = cmdr.DottedPathToCommand(d, cmd)
          break
        }
        rr := cmdr.NewCmdFrom(cmd)
        addTo(rr, cmdr.RootFrom(root))
      })
}

func addTo(rr cmdr.OptCmd, root *cmdr.RootCmdOpt) {
    c := cmdr.NewSubCmd()

    c.Titles("color-table", "ct").
        Description("print shell escape sequence table", "").
        Group(cmdr.SysMgmtGroup).
        Hidden(hidden).
        Action(printColorTable).
        AttachTo(rr)
    //...
}

func WithConfigFileLoadingHooks added in v1.7.43 

func WithConfigFileLoadingHooks(before, after HookFunc) ExecOption

WithConfigFileLoadingHooks adds the hook function to the front and back of trying to load config files.

These two hooks always are triggered whatever WithNoLoadConfigFiles is enabled or not.

func WithConfigLoadedListener added in v1.5.0 

func WithConfigLoadedListener(c ConfigReloaded) ExecOption

WithConfigLoadedListener adds a functor on config loaded and merged

func WithConfigSubDirAutoName added in v1.7.31 

func WithConfigSubDirAutoName(folderName string) ExecOption

WithConfigSubDirAutoName specify an alternate folder name instead `conf.d`.

By default, cmdr watches all files in the sub-directory `conf.d` of which folder contains the main config file.

func WithCustomShowBuildInfo added in v1.5.0 

func WithCustomShowBuildInfo(fn func()) ExecOption

WithCustomShowBuildInfo supports your `ShowBuildInfo()` instead of internal `showBuildInfo()`

func WithCustomShowVersion added in v1.5.0 

func WithCustomShowVersion(fn func()) ExecOption

WithCustomShowVersion supports your `ShowVersion()` instead of internal `showVersion()`

func WithEnvPrefix added in v1.5.0 

func WithEnvPrefix(prefix ...string) ExecOption

WithEnvPrefix sets the environment variable text prefixes. cmdr will lookup envvars for a key. Default env-prefix is array ["CMDR"], ie 'CMDR_'

func WithEnvVarMap added in v1.6.3 

func WithEnvVarMap(varToValue map[string]func() string) ExecOption

WithEnvVarMap adds a (envvar-name, value) map, which will be applied to string option value, string-slice option values, .... For example, you could define a key-value entry in your `<app>.yml` file: 

app:
  test-value: "$THIS/$APPNAME.yml"
  home-dir: "$HOME"

it will be expanded by mapping to OS environment and this map (WithEnvVarMap). That is, $THIS will be expanded to the directory path of this executable, $APPNAME to the app name. And of course, $HOME will be mapped to os home directory path.

func WithExtensionsLocations added in v1.7.23 

func WithExtensionsLocations(locations ...string) ExecOption

WithExtensionsLocations sets the extension locations.

A extension is an executable (shell scripts, binary executable, ,,,).

Default locations are: 

    []string{
		   "./ci/local/share/$APPNAME/ext",
		   "$HOME/.local/share/$APPNAME/ext",
		   "$HOME/.$APPNAME/ext",
		   "/usr/local/share/$APPNAME/ext",
		   "/usr/share/$APPNAME/ext",
    },

See also internalResetWorkerNoLock()

func WithGlobalPostActions added in v1.7.46 

func WithGlobalPostActions(fns ...Invoker) ExecOption

WithGlobalPostActions adds the post-action for each command invoked

func WithGlobalPreActions added in v1.7.46 

func WithGlobalPreActions(fns ...Handler) ExecOption

WithGlobalPreActions adds the pre-action for every command invoking

func WithHelpPainter added in v1.5.0 

func WithHelpPainter(painter Painter) ExecOption

WithHelpPainter allows to change the behavior and facade of help screen.

func WithHelpScreenHooks added in v1.7.27 

func WithHelpScreenHooks(before, after HookHelpScreenFunc) ExecOption

WithHelpScreenHooks adds the hook function to the front and back of printing help screen

func WithHelpTabStop added in v1.5.0 

func WithHelpTabStop(tabStop int) ExecOption

WithHelpTabStop sets the tab-stop position in the help screen Default tabstop is 48

Deprecated since v1.7.8 because the tab-stop position will be autosize from then on.

func WithHelpTailLine added in v1.6.11 

func WithHelpTailLine(line string) ExecOption

WithHelpTailLine setup the tail line in help screen

Default line is: 

"\nType '-h' or '--help' to get command help screen."

Tiny html codes are supported, such as: 

b/strong, i/cite, u, code/kbd, mark, del, font

These tags are parsed but ignored: 

html, head, body

func WithIIfOpt added in v1.11.9 

func WithIIfOpt(condition bool, yes, no func() ExecOption) ExecOption

func WithIfOpt added in v1.11.9 

func WithIfOpt(condition bool, yes func() ExecOption) ExecOption

func WithIgnoreWrongEnumValue added in v1.5.0 

func WithIgnoreWrongEnumValue(ignored bool) ExecOption

WithIgnoreWrongEnumValue will be put into `cmdrError.Ignorable` while wrong enumerable value found in parsing command-line options. The default is true.

Main program might decide whether it's a warning or error.

See also

[Flag.ValidArgs]

func WithInternalDefaultAction added in v1.10.27 

func WithInternalDefaultAction(useInternalDefaultAction bool, userDefinedActionHandler ...Handler) ExecOption

WithInternalDefaultAction provides a default command action to which hasn't been defined.

func WithInternalOutputStreams added in v1.5.0 

func WithInternalOutputStreams(out, err *bufio.Writer) ExecOption

WithInternalOutputStreams sets the internal output streams for debugging

func WithLogx added in v1.7.6 

func WithLogx(logger log.Logger) ExecOption

WithLogx enables github.com/hedzr/logex,log integration

Sample 1: 

WithLogx(log.NewDummyLogger()),	// import "github.com/hedzr/log"
WithLogx(log.NewStdLogger()),	// import "github.com/hedzr/log"
WithLogx(logrus.New()),		// import "github.com/hedzr/logex/logx/logrus"
WithLogx(sugar.New()),		// import "github.com/hedzr/logex/logx/zap/sugar"
WithLogx(zap.New()),			// import "github.com/hedzr/logex/logx/zap"

Sample 2: 

WithLogx(build.New(loggerConfig)),	// import "github.com/hedzr/logex/build"
WithLogx(build.New(build.NewLoggerConfigWith(true, "zap", "debug")),

func WithLogxShort added in v1.7.43 

func WithLogxShort(enabled bool, backend, level string) ExecOption

WithLogxShort enables github.com/hedzr/logex,log integration

func WithNoColor added in v1.6.3 

func WithNoColor(b bool) ExecOption

WithNoColor make console outputs plain and without ANSI escape colors

Since v1.6.2+

func WithNoCommandAction added in v1.6.17 

func WithNoCommandAction(b bool) ExecOption

WithNoCommandAction do NOT run the action of the matched command.

func WithNoDefaultHelpScreen added in v1.6.0 

func WithNoDefaultHelpScreen(b bool) ExecOption

WithNoDefaultHelpScreen true to disable printing help screen if without any arguments

func WithNoEnvOverrides added in v1.6.3 

func WithNoEnvOverrides(b bool) ExecOption

WithNoEnvOverrides enables the internal no-env-overrides mode

Since v1.6.2+

In this mode, cmdr do NOT find and transfer equivalent envvar value into cmdr options store.

func WithNoLoadConfigFiles added in v1.5.0 

func WithNoLoadConfigFiles(b bool) ExecOption

WithNoLoadConfigFiles true means no loading config files

func WithNoWarnings added in v1.11.11 

func WithNoWarnings(b bool) ExecOption

WithNoWarnings disable internal warnings

func WithNoWatchConfigFiles added in v1.6.9 

func WithNoWatchConfigFiles(b bool) ExecOption

WithNoWatchConfigFiles true means no watching the config files

func WithOnPassThruCharHit added in v1.6.18 

func WithOnPassThruCharHit(fn func(parsed *Command, switchChar string, args []string) (err error)) ExecOption

WithOnPassThruCharHit handle the passthrough char(s) (i.e. '--') matched For example, type `bin/fluent mx -d -- --help` will trigger this callback at the 2nd flag '--'.

func WithOnSwitchCharHit added in v1.6.18 

func WithOnSwitchCharHit(fn func(parsed *Command, switchChar string, args []string) (err error)) ExecOption

WithOnSwitchCharHit handle the exact single switch-char (such as '-', '/', '~') matched. For example, type `bin/fluent mx -d - --help` will trigger this callback at the 2nd flag '-'.

func WithOptionMergeModifying added in v1.6.12 

func WithOptionMergeModifying(onMergingSet func(keyPath string, value, oldVal interface{})) ExecOption

WithOptionMergeModifying adds a callback which invoked on new configurations was merging into, typically on loading the modified external config file(s). NOTE that MergeWith(...) can make it triggered too. A onMergingSet callback will be enabled after first loaded any external configuration files and environment variables merged.

func WithOptionModifying added in v1.6.12 

func WithOptionModifying(onOptionSet func(keyPath string, value, oldVal interface{})) ExecOption

WithOptionModifying adds a callback which invoked at each time any option was modified. It will be triggered after any external config files first loaded and the env variables had been merged.

func WithOptionsPrefix added in v1.5.0 

func WithOptionsPrefix(prefix ...string) ExecOption

WithOptionsPrefix create a top-level namespace, which contains all normalized `Flag`s. =WithRxxtPrefix Default Options Prefix is array ["app"], ie 'app.xxx'

func WithPagerEnabled added in v1.6.41 

func WithPagerEnabled(enabled ...bool) ExecOption

WithPagerEnabled transfer cmdr stdout to OS pager. The environment variable `PAGER` will be checkout, otherwise `less`.

NOTICE ONLY the outputs of cmdr (such as help screen) will be paged.

func WithPluginLocations added in v1.7.23 

func WithPluginLocations(locations ...string) ExecOption

WithPluginLocations sets the addon locations.

An addon is a golang plugin for cmdr.

Default locations are: 

    []string{
		   "./ci/local/share/$APPNAME/addons",
		   "$HOME/.local/share/$APPNAME/addons",
		   "$HOME/.$APPNAME/addons",
		   "/usr/local/share/$APPNAME/addons",
		   "/usr/share/$APPNAME/addons",
    },

See also internalResetWorkerNoLock()

func WithPredefinedLocations added in v1.5.0 

func WithPredefinedLocations(locations ...string) ExecOption

WithPredefinedLocations sets the main config file locations.

Default is: 

[]string{
    "./ci/etc/$APPNAME/$APPNAME.yml",       // for developer
    "/etc/$APPNAME/$APPNAME.yml",           // regular location
    "/usr/local/etc/$APPNAME/$APPNAME.yml", // regular macOS HomeBrew location
    "/opt/etc/$APPNAME/$APPNAME.yml",       // regular location
    "/var/lib/etc/$APPNAME/$APPNAME.yml",   // regular location
    "$HOME/.config/$APPNAME/$APPNAME.yml",  // per user
    "$THIS/$APPNAME.yml",                   // executable's directory
    "$APPNAME.yml",                         // current directory
},

See also internalResetWorkerNoLock()

func WithRxxtPrefix added in v1.5.0 

func WithRxxtPrefix(prefix ...string) ExecOption

WithRxxtPrefix create a top-level namespace, which contains all normalized `Flag`s. cmdr will lookup envvars for a key. Default Options Prefix is array ["app"], ie 'app.xxx'

func WithSearchAlterConfigFiles added in v1.7.31 

func WithSearchAlterConfigFiles(b bool) ExecOption

WithSearchAlterConfigFiles adds CURR_DIR/.<appname>.yml and CURR_DIR/.<appname>/*.yml to the assumed config files and folders

func WithSecondaryLocations added in v1.10.9 

func WithSecondaryLocations(locations ...string) ExecOption

WithSecondaryLocations sets the secondary config file locations.

Default is: 

secondaryLocations: []string{
    "/ci/etc/$APPNAME/conf/$APPNAME.yml",
    "/etc/$APPNAME/conf/$APPNAME.yml",
    "/usr/local/etc/$APPNAME/conf/$APPNAME.yml",
    "$HOME/.$APPNAME/$APPNAME.yml", // ext location per user
},

The child `conf.d` folder will be loaded too.

func WithShellCompletionCommandEnabled added in v1.10.27 

func WithShellCompletionCommandEnabled(b bool) ExecOption

WithShellCompletionCommandEnabled enables __complete command for internal usage in fish, ps, etc..

func WithSimilarThreshold added in v1.5.5 

func WithSimilarThreshold(similarThreshold float64) ExecOption

WithSimilarThreshold defines a threshold for command/option similar detector. Default threshold is 0.6666666666666666. See also JaroWinklerDistance

func WithStrictMode added in v1.6.3 

func WithStrictMode(b bool) ExecOption

WithStrictMode enables the internal strict mode

Since v1.6.2+

In this mode, any warnings will be treat as an error and cause app fatal exit.

In normal mode, these cases are assumed as warnings: - flag name not found - command or sub-command name not found - value extracting failed - ...

func WithToggleGroupChoicerNewStyle added in v1.9.2 

func WithToggleGroupChoicerNewStyle(style, trueChoicer, falseChoicer string) ExecOption

WithToggleGroupChoicerNewStyle enables customizable choicer characters with your own style name.

For `ToggleGroup Choicer` and its style, see also: https://github.com/hedzr/cmdr/issues/1#issuecomment-968247546

func WithToggleGroupChoicerStyle added in v1.9.2 

func WithToggleGroupChoicerStyle(style string) ExecOption

WithToggleGroupChoicerStyle allows user-defined choicer style.

The valid styles are: hexagon, triangle-right.

For `ToggleGroup Choicer` and its style, see also: https://github.com/hedzr/cmdr/issues/1#issuecomment-968247546

func WithUnhandledErrorHandler added in v1.6.13 

func WithUnhandledErrorHandler(handler UnhandledErrorHandler) ExecOption

WithUnhandledErrorHandler handle the panics or exceptions generally

func WithUnknownOptionHandler added in v1.5.5 

func WithUnknownOptionHandler(handler UnknownOptionHandler) ExecOption

WithUnknownOptionHandler enables your customized wrong command/flag processor. internal processor supports smart suggestions for those wrong commands and flags.

func WithWarnForUnknownCommand added in v1.7.32 

func WithWarnForUnknownCommand(b bool) ExecOption

WithWarnForUnknownCommand warns the end user if unknown command found.

By default, cmdr ignore the first unknown command and treat them as remained arguments.

func WithWatchMainConfigFileToo added in v1.6.9 

func WithWatchMainConfigFileToo(b bool) ExecOption

WithWatchMainConfigFileToo enables the watcher on main config file.

By default, cmdr watches all files in the sub-directory `conf.d` of which folder contains the main config file. But as a feature, cmdr ignore the changes in main config file.

WithWatchMainConfigFileToo can switch this feature.

envvars: 

CFG_DIR: will be set to the folder contains the main config file
no-watch-conf-dir: if set true, the watcher will be disabled.

func WithXrefBuildingHooks added in v1.5.0 

func WithXrefBuildingHooks(beforeXrefBuildingX, afterXrefBuiltX HookFunc) ExecOption

WithXrefBuildingHooks sets the hook before and after building xref indices. It's replacers for AddOnBeforeXrefBuilding, and AddOnAfterXrefBuilt.

By using beforeXrefBuildingX, you could append, modify, or remove the builtin commands and options.

type ExecWorker added in v1.5.0 

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

ExecWorker is a core logic worker and holder

func (*ExecWorker) AddOnAfterXrefBuilt added in v1.5.0 

func (w *ExecWorker) AddOnAfterXrefBuilt(cb HookFunc)

AddOnAfterXrefBuilt add hook func daemon plugin needed

func (*ExecWorker) AddOnBeforeXrefBuilding added in v1.5.0 

func (w *ExecWorker) AddOnBeforeXrefBuilding(cb HookFunc)

AddOnBeforeXrefBuilding add hook func daemon plugin needed

func (*ExecWorker) InternalExecFor added in v1.5.0 

func (w *ExecWorker) InternalExecFor(rootCmd *RootCommand, args []string) (last *Command, err error)

InternalExecFor is an internal helper, esp for debugging

type Flag 

type Flag struct {
	BaseOpt `yaml:",inline"`

	// ToggleGroup for Toggle Group
	ToggleGroup string `yaml:"toggle-group,omitempty" json:"toggle-group,omitempty"`
	// DefaultValuePlaceholder for flag
	DefaultValuePlaceholder string `yaml:"default-placeholder,omitempty" json:"default-placeholder,omitempty"`
	// DefaultValue default value for flag
	DefaultValue interface{} `yaml:"default,omitempty" json:"default,omitempty"`
	// DefaultValueType is a string to indicate the data-type of DefaultValue.
	// It's only available in loading flag definition from a config-file (yaml/json/...).
	// Never used in writing your codes manually.
	DefaultValueType string `yaml:"type,omitempty" json:"type,omitempty"`
	// ValidArgs for enum flag
	ValidArgs []string `yaml:"valid-args,omitempty" json:"valid-args,omitempty"`
	// Required to-do
	Required bool `yaml:"required,omitempty" json:"required,omitempty"`

	// ExternalTool to get the value text by invoking external tool.
	// It's an environment variable name, such as: "EDITOR" (or cmdr.ExternalToolEditor)
	ExternalTool string `yaml:"external-tool,omitempty" json:"external-tool,omitempty"`

	// EnvVars give a list to bind to environment variables manually
	// it'll take effects since v1.6.9
	EnvVars []string `yaml:"envvars,flow,omitempty" json:"envvars,omitempty"`

	// HeadLike enables a free-hand option like `head -3`.
	//
	// When a free-hand option presents, it'll be treated as a named option with an integer value.
	//
	// For example, option/flag = `{{Full:"line",Short:"l"},HeadLike:true}`, the command line:
	// `app -3`
	// is equivalent to `app -l 3`, and so on.
	//
	// HeadLike assumed an named option with an integer value, that means, Min and Max can be applied on it too.
	// NOTE: Only one head-like option can be defined in a command/sub-command chain.
	HeadLike bool `yaml:"head-like,omitempty" json:"head-like,omitempty"`

	// Min minimal value of a range.
	Min int64 `yaml:"min,omitempty" json:"min,omitempty"`
	// Max maximal value of a range.
	Max int64 `yaml:"max,omitempty" json:"max,omitempty"`
	// contains filtered or unexported fields
}

Flag means a flag, a option, or a opt.

func FindFlag added in v0.2.17 

func FindFlag(longName string, cmd *Command) (res *Flag)

FindFlag find flag with `longName` from `cmd` if cmd == nil: finding from root command

func FindFlagRecursive added in v0.2.17 

func FindFlagRecursive(longName string, cmd *Command) (res *Flag)

FindFlagRecursive find flag with `longName` from `cmd` recursively if cmd == nil: finding from root command

func GetHitFlags added in v1.10.27 

func GetHitFlags() []*Flag

GetHitFlags returns all matched flags from commandline

func (*Flag) Delete added in v1.10.0 

func (f *Flag) Delete()

Delete removes myself from the command owner.

func (*Flag) EqualTo added in v1.10.27 

func (f *Flag) EqualTo(rh *Flag) (ok bool)

EqualTo _

func (*Flag) GetDescZsh added in v0.2.13 

func (f *Flag) GetDescZsh() (desc string)

GetDescZsh temp

func (*Flag) GetDottedNamePath added in v1.10.13 

func (f *Flag) GetDottedNamePath() string

GetDottedNamePath return the dotted key path of this flag in the options store.

func (*Flag) GetDottedNamePathEx added in v1.11.23 

func (f *Flag) GetDottedNamePathEx() string

GetDottedNamePathEx return the dotted key path of this flag in the options store.

func (*Flag) GetTitleFlagNames added in v0.2.13 

func (f *Flag) GetTitleFlagNames() string

GetTitleFlagNames temp

func (*Flag) GetTitleFlagNamesBy added in v0.2.13 

func (f *Flag) GetTitleFlagNamesBy(delimChar string) string

GetTitleFlagNamesBy temp

func (*Flag) GetTitleFlagNamesByMax added in v0.2.13 

func (f *Flag) GetTitleFlagNamesByMax(delimChar string, maxShort int) string

GetTitleFlagNamesByMax temp

func (*Flag) GetTitleZshFlagName added in v0.2.13 

func (f *Flag) GetTitleZshFlagName() (str string)

GetTitleZshFlagName temp

func (*Flag) GetTitleZshFlagNamesArray added in v0.2.13 

func (f *Flag) GetTitleZshFlagNamesArray() (ary []string)

GetTitleZshFlagNamesArray temp

func (*Flag) GetTitleZshFlagShortName added in v1.9.4 

func (f *Flag) GetTitleZshFlagShortName() (str string)

GetTitleZshFlagShortName temp

func (*Flag) GetTitleZshNamesBy added in v1.9.4 

func (f *Flag) GetTitleZshNamesBy(delimChar string, allowPrefix, quoted bool) (str string)

GetTitleZshNamesBy temp

func (*Flag) GetTitleZshNamesExtBy added in v1.9.4 

func (f *Flag) GetTitleZshNamesExtBy(delimChar string, allowPrefix, quoted, shortTitleOnly, longTitleOnly bool) (str string)

GetTitleZshNamesExtBy temp

func (*Flag) GetTriggeredTimes added in v1.5.1 

func (f *Flag) GetTriggeredTimes() int

GetTriggeredTimes returns the matched times

type Handler added in v1.6.39 

type Handler func(cmd *Command, args []string) (err error)

Handler handles the event on a subcommand matched

type HookFunc added in v1.5.1 

type HookFunc func(root *RootCommand, args []string)

HookFunc the hook function prototype for SetBeforeXrefBuilding and SetAfterXrefBuilt

type HookHelpScreenFunc added in v1.7.27 

type HookHelpScreenFunc func(w *ExecWorker, p Painter, cmd *Command, justFlags bool)

HookHelpScreenFunc the hook function prototype

type HookOptsFunc added in v1.5.1 

type HookOptsFunc func(root *RootCommand, opts *Options)

HookOptsFunc the hook function prototype

type Invoker added in v1.6.39 

type Invoker func(cmd *Command, args []string)

Invoker is a Handler but without error returns

type Level added in v1.6.25 

type Level uint32

Level type 

const (
	// PanicLevel level, highest level of severity. Logs and then calls panic with the
	// message passed to Debug, Info, ...
	PanicLevel Level = iota
	// FatalLevel level. Logs and then calls `logger.Exit(1)`. It will exit even if the
	// logging level is set to Panic.
	FatalLevel
	// ErrorLevel level. Logs. Used for errors that should definitely be noted.
	// Commonly used for hooks to send errors to an error tracking service.
	ErrorLevel
	// WarnLevel level. Non-critical entries that deserve eyes.
	WarnLevel
	// InfoLevel level. General operational entries about what's going on inside the
	// application.
	InfoLevel
	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
	DebugLevel
	// TraceLevel level. Designates finer-grained informational events than the Debug.
	TraceLevel
	// OffLevel level. The logger will be shutdown.
	OffLevel
)

These are the different logging levels. You can set the logging level to log on your instance of logger, obtained with `log.NewDummyLogger()`/`log.NewStdLogger()`.

func GetLoggerLevel added in v1.6.25 

func GetLoggerLevel() Level

GetLoggerLevel returns the current logger level after parsed.

func ParseLevel added in v1.6.25 

func ParseLevel(lvl string) (Level, error)

ParseLevel takes a string level and returns the hedzr/log logging level constant.

func (Level) MarshalText added in v1.6.25 

func (level Level) MarshalText() ([]byte, error)

MarshalText convert Level to string and []byte

func (Level) String added in v1.6.25 

func (level Level) String() string

Convert the Level to a string. E.g. PanicLevel becomes "panic".

func (*Level) UnmarshalText added in v1.6.25 

func (level *Level) UnmarshalText(text []byte) error

UnmarshalText implements encoding.TextUnmarshaler.

type OnOptionSetCB added in v1.7.27 

type OnOptionSetCB func(keyPath string, value, oldVal interface{})

OnOptionSetCB is a callback function while an option is being set (or merged)

type OnPassThruCharHitCB added in v1.7.27 

type OnPassThruCharHitCB func(parsed *Command, switchChar string, args []string) (err error)

OnPassThruCharHitCB is a callback function ...

type OnSet added in v1.6.8 

type OnSet interface {
	// OnSet will be callback'd once the flag parsed
	OnSet(f func(keyPath string, value interface{})) (opt OptFlag)
}

OnSet interface

type OnSwitchCharHitCB added in v1.7.27 

type OnSwitchCharHitCB func(parsed *Command, switchChar string, args []string) (err error)

OnSwitchCharHitCB is a callback function ...

type OptCmd added in v0.2.15 

type OptCmd interface {
	// Titles broken API since v1.6.39
	//
	// If necessary, an order prefix can be attached to the long title.
	// The title with prefix will be set to Name field and striped to Long field.
	//
	// An order prefix is a dotted string with multiple alphabet and digit. Such as:
	// "zzzz.", "0001.", "700.", "A1." ...
	//
	Titles(long, short string, aliases ...string) (opt OptCmd)
	// Short gives a short form sub-command title in string representation.
	//
	// A short command title is often one char, sometimes it can be
	// two chars, but even more is allowed.
	Short(short string) (opt OptCmd)
	// Long gives a long form sub-command title, we call it 'Full Title' too.
	//
	// A long title should be one or more words in english, separated
	// by short hypen ('-'), for example 'create-new-account'.
	//
	// Of course, in a multiple-level command system, a better
	// hierarchical command structure might be:
	//
	//     ROOT
	//       account
	//         create
	//         edit
	//         suspend
	//         destroy
	//
	Long(long string) (opt OptCmd)
	// Name is an internal identity, and an order prefix is optional
	//
	// An ordered prefix is a dotted string with multiple alphabets
	// and digits. Such as:
	//     "zzzz.", "0001.", "700.", "A1." ...
	Name(name string) (opt OptCmd)
	// Aliases gives more choices for a command.
	Aliases(ss ...string) (opt OptCmd)
	// Description gives normal and long form description of a command.
	//
	// Tiny html codes are supported, such as:
	//     b/strong, i/cite, u, code/kbd, mark, del, font
	// These tags are parsed but ignored:
	//     html, head, body
	Description(oneLine string, long ...string) (opt OptCmd)
	// Examples gives text to be shown in a section in the help screen.
	//
	// Tiny html codes are supported, such as:
	//     b/strong, i/cite, u, code/kbd, mark, del, font
	// These tags are parsed but ignored:
	//     html, head, body
	Examples(examples string) (opt OptCmd)
	// Group provides command group name.
	//
	// All commands with same group name will be agreegated in
	// one group.
	//
	// An order prefix is a dotted string with multiple alphabet
	// and digit. Such as:
	//     "zzzz.", "0001.", "700.", "A1." ...
	Group(group string) (opt OptCmd)
	// Hidden command will not be shown in help screen, expect user
	// entered 'app --help -vvv'.
	//
	// NOTE -v is a builtin flag, -vvv means be triggered 3rd
	// times.
	//
	// And the triggered times of a flag can be retrieved by
	// flag.GetTriggeredTimes(), or via cmdr Option Store API:
	// cmdr.GetFlagHitCount("verbose") / cmdr.GetVerboseHitCount().
	Hidden(hidden bool) (opt OptCmd)
	// VendorHidden command will never be shown in help screen, even
	// if user was entering 'app --help -vvv'.
	//
	// NOTE -v is a builtin flag, -vvv means be triggered 3rd times.
	//
	// And the triggered times of a flag can be retrieved by
	// flag.GetTriggeredTimes(), or via cmdr Option Store API:
	// cmdr.GetFlagHitCount("verbose") / cmdr.GetVerboseHitCount().
	VendorHidden(hidden bool) (opt OptCmd)
	// Deprecated gives a tip to users to encourage them to move
	// up to some new API/commands/operations.
	//
	// A tip is starting by 'Since v....' typically, for instance:
	//
	// Since v1.10.36, PlaceHolder is deprecated, use PlaceHolders
	// is recommended for more abilities.
	Deprecated(deprecation string) (opt OptCmd)
	// Action will be triggered after all command-line arguments parsed.
	//
	// Action might be the most important entry for a command.
	//
	// For a nest command system, parent command shouldn't get a
	// valid Action handler because we need to get a chance to
	// step into its children for parsing command-line.
	Action(action Handler) (opt OptCmd)

	// PreAction will be invoked before running Action
	// NOTE that RootCommand.PreAction will be invoked too.
	PreAction(pre Handler) (opt OptCmd)
	// PostAction will be invoked after run Action
	// NOTE that RootCommand.PostAction will be invoked too.
	PostAction(post Invoker) (opt OptCmd)

	// TailPlaceholder gives two places to place the placeholders.
	// It looks like the following form:
	//
	//     austr dns add <placeholder-1st> [Options] [Parent/Global Options] <placeholders-more...>
	//
	// As shown, you may specify at:
	//
	// - before '[Options] [Parent/Global Options]'
	// - after '[Options] [Parent/Global Options]'
	//
	// In TailPlaceHolders slice, [0] is `placeholder-1st“, and others
	// are `placeholders-more`.
	//
	// Others:
	//   TailArgsText string [no plan]
	//   TailArgsDesc string [no plan]
	TailPlaceholder(placeholders ...string) (opt OptCmd)

	// Sets _
	//
	// Reserved API.
	Sets(func(cmd OptCmd)) (opt OptCmd)

	// OwnerCommand returns the parent command in OptCmd form.
	//
	// It's available for building time.
	OwnerCommand() (opt OptCmd)
	// SetOwner just work for internal purpose
	SetOwner(opt OptCmd)

	RootCommand() *RootCommand
	RootCmdOpt() (root *RootCmdOpt)

	ToCommand() *Command

	// AddOptFlag _
	//
	// Deprecated since v1.10.36
	AddOptFlag(flag OptFlag)
	// AddFlag _
	//
	// Deprecated since v1.10.36
	AddFlag(flag *Flag)
	// AddOptCmd adds 'opt' OptCmd as a sub-command.
	//
	// Deprecated since v1.10.36
	AddOptCmd(opt OptCmd)
	// AddCommand adds a *Command as a sub-command.
	//
	// Deprecated since v1.10.36
	AddCommand(cmd *Command)

	// AttachTo attaches itself as a sub-command of 'opt' OptCmd object
	AttachTo(parentOpt OptCmd) (opt OptCmd)
	// AttachToCommand attaches itself as a sub-command of *Command object
	AttachToCommand(cmd *Command) (opt OptCmd)
	// AttachToRoot attaches itself as a sub-command of *RootCommand object
	AttachToRoot(root *RootCommand) (opt OptCmd)
}

OptCmd to support fluent api of cmdr. see also: cmdr.Root().NewSubCommand()/.NewFlag()

func NewCmd added in v0.2.17 

func NewCmd() (opt OptCmd)

NewCmd creates a wrapped Command object as OptCmd

func NewCmdFrom added in v0.2.17 

func NewCmdFrom(cmd *Command) (opt OptCmd)

NewCmdFrom creates a wrapped Command object as OptCmd, and make it as the current working item.

func NewSubCmd added in v0.2.17 

func NewSubCmd() (opt OptCmd)

NewSubCmd creates a wrapped Command object as OptCmd, and append it into the current working item.

type OptFlag added in v0.2.15 

type OptFlag interface {
	// Titles broken API since v1.6.39.
	//
	// If necessary, an ordered prefix can be attached to the long
	// title. The title with prefix will be set to Name field and
	// striped to Long field.
	//
	// An ordered prefix is a dotted string with multiple alphabets
	// and digits. Such as:
	//     "zzzz.", "0001.", "700.", "A1." ...
	Titles(long, short string, aliases ...string) (opt OptFlag)
	// Short gives a short form sub-command title in string representation.
	//
	// A short command title is often one char, sometimes it can be
	// two chars, but even more is allowed.
	Short(short string) (opt OptFlag)
	// Long gives a long form flag title, we call it 'Full Title' too.
	//
	// A long title should be one or more words in english, separated
	// by short hypen ('-'), for example 'auto-increment'.
	//
	Long(long string) (opt OptFlag)
	// Name is an internal identity, and an order prefix is optional
	//
	// An ordered prefix is a dotted string with multiple alphabets
	// and digits. Such as:
	//     "zzzz.", "0001.", "700.", "A1." ...
	Name(name string) (opt OptFlag)
	// Aliases give more choices for a command.
	Aliases(ss ...string) (opt OptFlag)
	// Description gives normal and long form description of a flag.
	//
	// Tiny html codes are supported, such as:
	//     b/strong, i/cite, u, code/kbd, mark, del, font
	// These tags are parsed but ignored:
	//     html, head, body
	Description(oneLineDesc string, longDesc ...string) (opt OptFlag)
	// Examples gives text to be shown in a section in the help screen.
	//
	// Tiny html codes are supported, such as:
	//     b/strong, i/cite, u, code/kbd, mark, del, font
	// These tags are parsed but ignored:
	//     html, head, body
	Examples(examples string) (opt OptFlag)
	// Group provides flag group name.
	//
	// All flags with same group name will be agreegated in
	// one group.
	//
	// An order prefix is a dotted string with multiple alphabet
	// and digit. Such as:
	//     "zzzz.", "0001.", "700.", "A1." ...
	Group(group string) (opt OptFlag)
	// Hidden flag will not be shown in help screen, expect user
	// entered 'app --help -vvv'.
	//
	// NOTE -v is a builtin flag, -vvv means be triggered 3rd times.
	//
	// And the triggered times of a flag can be retrieved by
	// flag.GetTriggeredTimes(), or via cmdr Option Store API:
	// cmdr.GetFlagHitCount("verbose") / cmdr.GetVerboseHitCount().
	Hidden(hidden bool) (opt OptFlag)
	// VendorHidden flag will never be shown in help screen, even
	// if user was entering 'app --help -vvv'.
	//
	// NOTE -v is a builtin flag, -vvv means be triggered 3rd times.
	//
	// And the triggered times of a flag can be retrieved by
	// flag.GetTriggeredTimes(), or via cmdr Option Store API:
	// cmdr.GetFlagHitCount("verbose") / cmdr.GetVerboseHitCount().
	VendorHidden(hidden bool) (opt OptFlag)
	// Deprecated gives a tip to users to encourage them to move
	// up to some new API/commands/operations.
	//
	// A tip is starting by 'Since v....' typically, for instance:
	//
	// Since v1.10.36, PlaceHolder is deprecated, use PlaceHolders
	// is recommended for more abilities.
	Deprecated(deprecation string) (opt OptFlag)
	// Action will be triggered once being parsed ok
	Action(action Handler) (opt OptFlag)

	// ToggleGroup provides the RADIO BUTTON model for a set of
	// flags.
	//
	// The flags with same toggle group name will be agreegated
	// into one group.
	//
	// One of them are set will clear all of others flags in same
	// toggle group.
	// In programmtically, you may retrieve the final choice by its
	// name, see also toggle-group example (at our cmdr-examples repo).
	//
	// NOTE When the ToggleGroup specified, Group can be ignored.
	//
	//    func tg(root cmdr.OptCmd) {
	//      // toggle-group
	//
	//      c := cmdr.NewSubCmd().Titles("toggle-group", "tg").
	//        Description("soundex test").
	//        Group("Test").
	//        TailPlaceholder("[text1, text2, ...]").
	//        Action(func(cmd *cmdr.Command, args []string) (err error) {
	//          selectedMuxType := cmdr.GetStringR("toggle-group.mux-type")
	//          fmt.Printf("Flag 'echo' = %v\n", cmdr.GetBoolR("toggle-group.echo"))
	//          fmt.Printf("Flag 'gin' = %v\n", cmdr.GetBoolR("toggle-group.gin"))
	//          fmt.Printf("Flag 'gorilla' = %v\n", cmdr.GetBoolR("toggle-group.gorilla"))
	//          fmt.Printf("Flag 'iris' = %v\n", cmdr.GetBoolR("toggle-group.iris"))
	//          fmt.Printf("Flag 'std' = %v\n", cmdr.GetBoolR("toggle-group.std"))
	//          fmt.Printf("Toggle Group 'mux-type' = %v\n", selectedMuxType)
	//          return
	//        }).
	//        AttachTo(root)
	//
	//      cmdr.NewBool(false).Titles("echo", "echo").Description("using 'echo' mux").ToggleGroup("mux-type").Group("Mux").AttachTo(c)
	//      cmdr.NewBool(false).Titles("gin", "gin").Description("using 'gin' mux").ToggleGroup("mux-type").Group("Mux").AttachTo(c)
	//      cmdr.NewBool(false).Titles("gorilla", "gorilla").Description("using 'gorilla' mux").ToggleGroup("mux-type").Group("Mux").AttachTo(c)
	//      cmdr.NewBool(true).Titles("iris", "iris").Description("using 'iris' mux").ToggleGroup("mux-type").Group("Mux").AttachTo(c)
	//      cmdr.NewBool(false).Titles("std", "std").Description("using standardlib http mux mux").ToggleGroup("mux-type").Group("Mux").AttachTo(c)
	//    }
	//
	ToggleGroup(group string) (opt OptFlag)
	// DefaultValue needs an exact typed 'val'.
	//
	// IMPORTANT: cmdr interprets value-type of an option based
	// on the underlying default value set.
	DefaultValue(val interface{}, placeholder string) (opt OptFlag)
	// Placeholder _
	// Deprecated since v1.10.40
	Placeholder(placeholder string) (opt OptFlag)
	// CompletionActionStr for zsh completion
	CompletionActionStr(s string) (opt OptFlag)
	// CompletionMutualExclusiveFlags is a slice of flag full/long titles
	CompletionMutualExclusiveFlags(flags ...string) (opt OptFlag)
	// CompletionPrerequisitesFlags is a slice of flag full/long titles
	CompletionPrerequisitesFlags(flags ...string) (opt OptFlag)
	// CompletionJustOnce for zsh completion
	CompletionJustOnce(once bool) (opt OptFlag)
	// CompletionCircuitBreak for zsh completion
	CompletionCircuitBreak(once bool) (opt OptFlag)
	// DoubleTildeOnly requests only the form is okay when the
	// double tilde chars ('~~') leads the flag.
	//
	// So, short form (-f) and long form (--flag) will be interpreted as
	// unknown flag found.
	DoubleTildeOnly(once bool) (opt OptFlag)
	// ExternalTool provides a OS-environment variable name,
	// which identify the position of an external tool.
	// When cmdr parsed command-line ok, the external tool
	// will be invoked at first.
	//
	// For example:
	//
	// 'git commit -m' will wake up EDITOR to edit a commit message.
	//
	ExternalTool(envKeyName string) (opt OptFlag)
	// ValidArgs gives a constrained list for input value of
	// a flag.
	//
	// ValidArgs provides ENUM type on command-line.
	ValidArgs(list ...string) (opt OptFlag)
	// HeadLike enables `head -n` mode.
	//
	// 'min', 'max' will be ignored at this version, its might be
	// impl in the future.
	//
	// There's only one head-like flag in one command and its parent
	// and children commands.
	HeadLike(enable bool, min, max int64) (opt OptFlag)

	// EnvKeys is a list of env-var names of binding on this flag.
	EnvKeys(keys ...string) (opt OptFlag)
	// Required flag is MUST BE supplied by user entering from
	// command-line.
	//
	// NOTE Required() sets the required flag to true while
	// it was been invoking with empty params.
	Required(required ...bool) (opt OptFlag)

	// OwnerCommand returns the parent command in OptCmd form.
	//
	// It's available for building time.
	OwnerCommand() (opt OptCmd)
	// SetOwner just work for internal purpose
	SetOwner(opt OptCmd)

	RootCommand() *RootCommand

	ToFlag() *Flag

	// AttachTo attaches itself as a flag of `opt` OptCmd object
	AttachTo(parent OptCmd) (opt OptFlag)
	// AttachToCommand attaches itself as a flag of *Command object
	AttachToCommand(cmd *Command) (opt OptFlag)
	// AttachToRoot attaches itself as a flag of *RootCommand object
	AttachToRoot(root *RootCommand) (opt OptFlag)

	OnSet
}

OptFlag to support fluent api of cmdr. see also: cmdr.Root().NewSubCommand()/.NewFlag()

For an option, its default value must be declared with exact type as is

func NewAny added in v1.10.49 

func NewAny(defaultValue ...any) (opt OptFlag)

NewAny creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewBool added in v0.2.17 

func NewBool(defaultValue ...bool) (opt OptFlag)

NewBool creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewComplex128 added in v1.6.21 

func NewComplex128(defaultValue ...complex128) (opt OptFlag)

NewComplex128 creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewComplex64 added in v1.6.21 

func NewComplex64(defaultValue ...complex64) (opt OptFlag)

NewComplex64 creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewDuration added in v0.2.17 

func NewDuration(defaultValue ...time.Duration) (opt OptFlag)

NewDuration creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewDurationFrom added in v1.0.3 

func NewDurationFrom(flg *Flag) (opt OptFlag)

NewDurationFrom creates a wrapped OptFlag, and append it into the current working item.

func NewFloat32 added in v1.0.1 

func NewFloat32(defaultValue ...float32) (opt OptFlag)

NewFloat32 creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewFloat64 added in v1.0.1 

func NewFloat64(defaultValue ...float64) (opt OptFlag)

NewFloat64 creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewInt added in v0.2.17 

func NewInt(defaultValue ...int) (opt OptFlag)

NewInt creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewInt64 added in v0.2.17 

func NewInt64(defaultValue ...int64) (opt OptFlag)

NewInt64 creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewIntSlice added in v0.2.17 

func NewIntSlice(defaultValue ...int) (opt OptFlag)

NewIntSlice creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

Sample: 

cmdr.NewIntSlice(1, 2, 3).Titles("int-slice", "is").Group("").
    AttachTo(parentCmdOpt)

func NewString added in v0.2.17 

func NewString(defaultValue ...string) (opt OptFlag)

NewString creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewStringSlice added in v0.2.17 

func NewStringSlice(defaultValue ...string) (opt OptFlag)

NewStringSlice creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

Sample: 

cmdr.NewStringSlice("quick", "fox", "jumps").Titles("int-slice", "is").Group("").
    AttachTo(parentCmdOpt)

func NewTextVar added in v1.10.49 

func NewTextVar(defaultValue ...TextVar) (opt OptFlag)

NewTextVar creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewUint added in v0.2.17 

func NewUint(defaultValue ...uint) (opt OptFlag)

NewUint creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewUint64 added in v0.2.17 

func NewUint64(defaultValue ...uint64) (opt OptFlag)

NewUint64 creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

func NewUintSlice added in v1.6.47 

func NewUintSlice(defaultValue ...uint) (opt OptFlag)

NewUintSlice creates a wrapped OptFlag, you can connect it to a OptCmd via OptFlag.AttachXXX later.

Sample: 

cmdr.NewUintSlice(1, 2, 3).Titles("uint-slice", "us").Group("").
    AttachTo(parentCmdOpt)

type OptFlagType added in v0.2.15 

type OptFlagType int

OptFlagType to support fluent api of cmdr. see also: OptCmd.NewFlag(OptFlagType)

Usage 

root := cmdr.Root()
co := root.NewSubCommand()
co.NewFlag(cmdr.OptFlagTypeUint)

See also those short-hand constructors: Bool(), Int(), .... 

const (
	// OptFlagTypeBool to create a new bool flag
	OptFlagTypeBool OptFlagType = iota
	// OptFlagTypeInt to create a new int flag
	OptFlagTypeInt OptFlagType = iota + 1
	// OptFlagTypeUint to create a new uint flag
	OptFlagTypeUint OptFlagType = iota + 2
	// OptFlagTypeInt64 to create a new int64 flag
	OptFlagTypeInt64 OptFlagType = iota + 3
	// OptFlagTypeUint64 to create a new uint64 flag
	OptFlagTypeUint64 OptFlagType = iota + 4
	// OptFlagTypeFloat32 to create a new int float32 flag
	OptFlagTypeFloat32 OptFlagType = iota + 8
	// OptFlagTypeFloat64 to create a new int float64 flag
	OptFlagTypeFloat64 OptFlagType = iota + 9
	// OptFlagTypeComplex64 to create a new int complex64 flag
	OptFlagTypeComplex64 OptFlagType = iota + 10
	// OptFlagTypeComplex128 to create a new int complex128 flag
	OptFlagTypeComplex128 OptFlagType = iota + 11
	// OptFlagTypeString to create a new string flag
	OptFlagTypeString OptFlagType = iota + 12
	// OptFlagTypeStringSlice to create a new string slice flag
	OptFlagTypeStringSlice OptFlagType = iota + 13
	// OptFlagTypeIntSlice to create a new int slice flag
	OptFlagTypeIntSlice OptFlagType = iota + 14
	// OptFlagTypeInt64Slice to create a new int slice flag
	OptFlagTypeInt64Slice OptFlagType = iota + 15
	// OptFlagTypeUint64Slice to create a new int slice flag
	OptFlagTypeUint64Slice OptFlagType = iota + 16
	// OptFlagTypeDuration to create a new duration flag
	OptFlagTypeDuration OptFlagType = iota + 17
	// OptFlagTypeHumanReadableSize to create a new human readable size flag
	OptFlagTypeHumanReadableSize OptFlagType = iota + 18
)

type Options 

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

Options is a holder of all options

func CurrentOptions added in v1.10.19 

func CurrentOptions() *Options

CurrentOptions returns the global options instance (rxxtOptions), i.e. cmdr Options Store

func (*Options) CheckpointSize added in v1.10.0 

func (s *Options) CheckpointSize() int

CheckpointSize returns how many snapshots made see also SaveCheckpoint

func (*Options) ClearCheckpoints added in v1.10.0 

func (s *Options) ClearCheckpoints()

ClearCheckpoints removes all checkpoints from snapshot history see also SaveCheckpoint

func (*Options) Delete added in v1.6.3 

func (s *Options) Delete(key string)

Delete deletes a key from cmdr options store

func (*Options) DumpAsString 

func (s *Options) DumpAsString(showType bool) (str string)

DumpAsString for debugging.

func (*Options) Flush added in v1.7.37 

func (s *Options) Flush()

Flush writes all changes back to the alternative config file

func (*Options) FromKibiBytes added in v1.7.27 

func (s *Options) FromKibiBytes(sz string) (ir64 uint64)

FromKibiBytes convert string to the uint64 value based kibibyte format.

kibibyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kibibyte is based 1024. That means: 1 KiB = 1k = 1024 bytes

See also: https://en.wikipedia.org/wiki/Kibibyte Its related word is kilobyte, refer to: https://en.wikipedia.org/wiki/Kilobyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func (*Options) FromKilobytes added in v1.6.19 

func (s *Options) FromKilobytes(sz string) (ir64 uint64)

FromKilobytes convert string to the uint64 value based kilobyte format.

kilobyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kilobyte is based 1000. That means: 1 KB = 1k = 1000 bytes

See also: https://en.wikipedia.org/wiki/Kilobyte Its related word is kibibyte, refer to: https://en.wikipedia.org/wiki/Kibibyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func (*Options) Get 

func (s *Options) Get(key string) (ret interface{})

Get an `Option` by key string, eg: ```golang cmdr.Get("app.logger.level") => 'DEBUG',... ```

func (*Options) GetBoolEx added in v1.6.3 

func (s *Options) GetBoolEx(key string, defaultVal ...bool) (ret bool)

GetBoolEx returns the bool value of an `Option` key.

func (*Options) GetComplex128 added in v1.6.21 

func (s *Options) GetComplex128(key string, defaultVal ...complex128) (ir complex128)

GetComplex128 returns the complex128 value of an `Option` key.

func (*Options) GetComplex64 added in v1.6.21 

func (s *Options) GetComplex64(key string, defaultVal ...complex64) (ir complex64)

GetComplex64 returns the complex64 value of an `Option` key.

func (*Options) GetDuration added in v0.2.11 

func (s *Options) GetDuration(key string, defaultVal ...time.Duration) (ir time.Duration)

GetDuration returns the time duration value of an `Option` key.

func (*Options) GetFloat32Ex added in v1.6.3 

func (s *Options) GetFloat32Ex(key string, defaultVal ...float32) (ir float32)

GetFloat32Ex returns the float32 value of an `Option` key.

func (*Options) GetFloat64Ex added in v1.6.3 

func (s *Options) GetFloat64Ex(key string, defaultVal ...float64) (ir float64)

GetFloat64Ex returns the float64 value of an `Option` key.

func (*Options) GetHierarchyList added in v0.2.17 

func (s *Options) GetHierarchyList() map[string]interface{}

GetHierarchyList returns the hierarchy data for dumping

func (*Options) GetInt64Ex added in v1.6.3 

func (s *Options) GetInt64Ex(key string, defaultVal ...int64) (ir int64)

GetInt64Ex returns the int64 value of an `Option` key.

func (*Options) GetInt64Slice added in v1.5.5 

func (s *Options) GetInt64Slice(key string, defaultVal ...int64) (ir []int64)

GetInt64Slice returns the string slice value of an `Option` key.

func (*Options) GetIntEx added in v1.6.3 

func (s *Options) GetIntEx(key string, defaultVal ...int) (ir int)

GetIntEx returns the int64 value of an `Option` key.

func (*Options) GetIntSlice added in v0.2.11 

func (s *Options) GetIntSlice(key string, defaultVal ...int) (ir []int)

GetIntSlice returns the string slice value of an `Option` key.

func (*Options) GetKibibytesEx added in v1.6.19 

func (s *Options) GetKibibytesEx(key string, defaultVal ...uint64) (ir64 uint64)

GetKibibytesEx returns the uint64 value of an `Option` key based kibibyte format.

kibibyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kibibyte is based 1024. That means: 1 KiB = 1k = 1024 bytes

See also: https://en.wikipedia.org/wiki/Kibibyte Its related word is kilobyte, refer to: https://en.wikipedia.org/wiki/Kilobyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func (*Options) GetKilobytesEx added in v1.6.19 

func (s *Options) GetKilobytesEx(key string, defaultVal ...uint64) (ir64 uint64)

GetKilobytesEx returns the uint64 value of an `Option` key with kilobyte format.

kilobyte format is for human readable. In this format, number presentations are: 2k, 8m, 3g, 5t, 6p, 7e. optional 'b' can be appended, such as: 2kb, 5tb, 7EB. All of them is case-insensitive.

kilobyte is based 1000. That means: 1 KB = 1k = 1000 bytes

See also: https://en.wikipedia.org/wiki/Kilobyte Its related word is kibibyte, refer to: https://en.wikipedia.org/wiki/Kibibyte

The pure number part can be golang presentation, such as 0x99, 0001b, 0700.

func (*Options) GetMap added in v1.0.0 

func (s *Options) GetMap(key string) map[string]interface{}

GetMap an `Option` by key string, it returns a hierarchy map or nil

func (*Options) GetString 

func (s *Options) GetString(key string, defaultVal ...string) (ret string)

GetString returns the string value of an `Option` key.

func (*Options) GetStringNoExpand added in v1.6.7 

func (s *Options) GetStringNoExpand(key string, defaultVal ...string) (ret string)

GetStringNoExpand returns the string value of an `Option` key.

func (*Options) GetStringSlice 

func (s *Options) GetStringSlice(key string, defaultVal ...string) (ir []string)

GetStringSlice returns the string slice value of an `Option` key.

func (*Options) GetTextVar added in v1.10.49 

func (s *Options) GetTextVar(key string, defaultVal ...TextVar) (ir TextVar)

GetTextVar returns the time duration value of an `Option` key.

func (*Options) GetUint64Ex added in v1.6.3 

func (s *Options) GetUint64Ex(key string, defaultVal ...uint64) (ir uint64)

GetUint64Ex returns the uint64 value of an `Option` key.

func (*Options) GetUint64Slice added in v1.5.5 

func (s *Options) GetUint64Slice(key string, defaultVal ...uint64) (ir []uint64)

GetUint64Slice returns the string slice value of an `Option` key.

func (*Options) GetUintEx added in v1.6.3 

func (s *Options) GetUintEx(key string, defaultVal ...uint) (ir uint)

GetUintEx returns the uint64 value of an `Option` key.

func (*Options) Has added in v1.6.3 

func (s *Options) Has(key string) (ok bool)

Has detects whether a key exists in cmdr options store or not

func (*Options) LoadConfigFile 

func (s *Options) LoadConfigFile(file string, cft configFileType) (mainFile, subDir string, err error)

LoadConfigFile loads a yaml config file and merge the settings into `rxxtOptions` and load files in the `conf.d` child directory too.

func (*Options) MergeWith added in v1.1.4 

func (s *Options) MergeWith(m map[string]interface{}) (err error)

MergeWith will merge a map recursive.

func (*Options) Reset 

func (s *Options) Reset()

Reset the exists `Options`, so that you could follow a `LoadConfigFile()` with it.

func (*Options) RestoreCheckpoint added in v1.10.0 

func (s *Options) RestoreCheckpoint(n ...int) (err error)

RestoreCheckpoint restore 1 or n checkpoint(s) from snapshots history. see also SaveCheckpoint

func (*Options) SaveCheckpoint added in v1.10.0 

func (s *Options) SaveCheckpoint() (err error)

SaveCheckpoint make a snapshot of the current Option Store

You may ResetOptions after SaveCheckpoint: 

func x(aMap map[string]interface{}){
    defer cmdr.RestoreCheckpoint()
    cmdr.SaveCheckpoint()
    cmdr.ResetOptions()
    cmdr.MergeWith(map[string]interface{}{
      "app": map[string]interface{}{
        conf.AppName: map[string]interface{}{
          "a-map": aMap,
        }
      }
    }
    cmdr.SaveAsYaml("a-setting.yml")
}

func (*Options) Set 

func (s *Options) Set(key string, val interface{})

Set sets the value of an `Option` key. The key MUST not have an `app` prefix.

For example: ```golang cmdr.Set("debug", true) cmdr.GetBool("app.debug") => true ```

Set runs in slice appending mode: for a slice, Set(key, newSlice) will append newSlice into original slice.

func (*Options) SetNx 

func (s *Options) SetNx(key string, val interface{})

SetNx likes Set but without prefix auto-wrapped. `rxxtPrefix` is a string slice to define the prefix string array, default is ["app"]. So, cmdr.SetNx("debug", true) will put a real entry with (`debug`, true).

func (*Options) SetNxOverwrite added in v1.10.19 

func (s *Options) SetNxOverwrite(key string, val interface{})

SetNxOverwrite likes SetOverwrite but without prefix auto-wrapped. It replaces the old value on a slice, instead of the default append mode.

func (*Options) SetOverwrite added in v1.10.19 

func (s *Options) SetOverwrite(key string, val interface{})

SetOverwrite sets the value of an `Option` key. The key MUST not have an `app` prefix. It replaces the old value on a slice, instead of the default append mode.

SetOverwrite(key, newSlice) will replace the original value with newSlice.

func (*Options) SetRaw added in v1.9.4 

func (s *Options) SetRaw(key string, val interface{})

SetRaw but without prefix auto-wrapped. So, cmdr.SetRaw("debug", true) will put a real entry with (`debug`, true).

func (*Options) SetRawOverwrite added in v1.10.49 

func (s *Options) SetRawOverwrite(key string, val interface{})

SetRawOverwrite likes SetOverwrite but without prefix auto-wrapped. It replaces the old value on a slice, instead of the default append mode.

func (*Options) Wrap added in v1.10.13 

func (s *Options) Wrap(key string) string

Wrap wraps a key with [RxxtPrefix], for [GetXxx(key)] and [GetXxxP(prefix,key)]

type Painter added in v0.2.9 

type Painter interface {
	Printf(fmtStr string, args ...interface{})
	Print(fmtStr string, args ...interface{})

	FpPrintHeader(command *Command)
	FpPrintHelpTailLine(command *Command)

	FpUsagesTitle(command *Command, title string)
	FpUsagesLine(command *Command, fmt, appName, cmdList, cmdsTitle, tailPlaceHolder string)
	FpDescTitle(command *Command, title string)
	FpDescLine(command *Command)
	FpExamplesTitle(command *Command, title string)
	FpExamplesLine(command *Command)

	FpCommandsTitle(command *Command)
	FpCommandsGroupTitle(group string)
	FpCommandsLine(command *Command) (bufL, bufR bytes.Buffer)
	FpFlagsTitle(command *Command, flag *Flag, title string)
	FpFlagsGroupTitle(group string, isToggleGroup bool)
	FpFlagsLine(command *Command, flag *Flag, maxShort int, defValStr string) (bufL, bufR bytes.Buffer)

	Flush()

	Results() []byte

	// Reset does clear any internal states and reset itself
	Reset()
}

Painter to support the genManual, genMarkdown, printHelpScreen.

type RootCmdOpt added in v0.2.15 

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

RootCmdOpt for fluent api

func Root added in v0.2.15 

func Root(appName, version string) (opt *RootCmdOpt)

Root for fluent api, to create a new *RootCmdOpt object.

func RootFrom added in v1.0.3 

func RootFrom(root *RootCommand) (opt *RootCmdOpt)

RootFrom for fluent api, to create the new *RootCmdOpt object from an existed RootCommand

func (*RootCmdOpt) Action added in v0.2.15 

func (s *RootCmdOpt) Action(action Handler) (opt OptCmd)

func (*RootCmdOpt) AddCommand added in v1.6.7 

func (s *RootCmdOpt) AddCommand(cmd *Command)

func (*RootCmdOpt) AddFlag added in v1.6.7 

func (s *RootCmdOpt) AddFlag(flag *Flag)

func (*RootCmdOpt) AddGlobalPostAction added in v1.7.0 

func (s *RootCmdOpt) AddGlobalPostAction(post Invoker) *RootCmdOpt

AddGlobalPostAction attaches your post handler to the global Post-Actions list

func (*RootCmdOpt) AddGlobalPreAction added in v1.7.0 

func (s *RootCmdOpt) AddGlobalPreAction(pre Handler) *RootCmdOpt

AddGlobalPreAction attaches your pre handler to the global Pre-Actions list

func (*RootCmdOpt) AddOptCmd added in v1.6.7 

func (s *RootCmdOpt) AddOptCmd(opt OptCmd)

func (*RootCmdOpt) AddOptFlag added in v1.6.7 

func (s *RootCmdOpt) AddOptFlag(flag OptFlag)

func (*RootCmdOpt) Aliases added in v0.2.15 

func (s *RootCmdOpt) Aliases(aliases ...string) (opt OptCmd)

func (*RootCmdOpt) AppendPostActions added in v1.7.46 

func (s *RootCmdOpt) AppendPostActions(fns ...func(cmd *Command, args []string))

AppendPostActions adds the global post-action to cmdr system

func (*RootCmdOpt) AppendPreActions added in v1.7.46 

func (s *RootCmdOpt) AppendPreActions(fns ...func(cmd *Command, args []string) (err error))

AppendPreActions adds the global pre-action to cmdr system

func (*RootCmdOpt) AttachTo added in v1.6.7 

func (s *RootCmdOpt) AttachTo(parentOpt OptCmd) (opt OptCmd)

func (*RootCmdOpt) AttachToCommand added in v1.6.7 

func (s *RootCmdOpt) AttachToCommand(cmd *Command) (opt OptCmd)

func (*RootCmdOpt) AttachToRoot added in v1.6.7 

func (s *RootCmdOpt) AttachToRoot(root *RootCommand) (opt OptCmd)

func (*RootCmdOpt) Bool added in v0.2.15 

func (s *RootCmdOpt) Bool() (opt OptFlag)

func (*RootCmdOpt) Complex128 added in v1.6.21 

func (s *RootCmdOpt) Complex128() (opt OptFlag)

func (*RootCmdOpt) Complex64 added in v1.6.21 

func (s *RootCmdOpt) Complex64() (opt OptFlag)

func (*RootCmdOpt) Copyright added in v0.2.15 

func (s *RootCmdOpt) Copyright(copyright, author string) *RootCmdOpt

Copyright for fluent api

func (*RootCmdOpt) Deprecated added in v0.2.15 

func (s *RootCmdOpt) Deprecated(deprecation string) (opt OptCmd)

func (*RootCmdOpt) Description added in v0.2.15 

func (s *RootCmdOpt) Description(oneLine string, long ...string) (opt OptCmd)

func (*RootCmdOpt) Duration added in v0.2.17 

func (s *RootCmdOpt) Duration() (opt OptFlag)

func (*RootCmdOpt) Examples added in v0.2.15 

func (s *RootCmdOpt) Examples(examples string) (opt OptCmd)

func (*RootCmdOpt) Float32 added in v1.0.1 

func (s *RootCmdOpt) Float32() (opt OptFlag)

func (*RootCmdOpt) Float64 added in v1.0.1 

func (s *RootCmdOpt) Float64() (opt OptFlag)

func (*RootCmdOpt) Group added in v0.2.15 

func (s *RootCmdOpt) Group(group string) (opt OptCmd)

func (*RootCmdOpt) Header added in v0.2.15 

func (s *RootCmdOpt) Header(header string) *RootCmdOpt

Header for fluent api

func (*RootCmdOpt) Hidden added in v0.2.15 

func (s *RootCmdOpt) Hidden(hidden bool) (opt OptCmd)

func (*RootCmdOpt) Int added in v0.2.15 

func (s *RootCmdOpt) Int() (opt OptFlag)

func (*RootCmdOpt) Int64 added in v0.2.15 

func (s *RootCmdOpt) Int64() (opt OptFlag)

func (*RootCmdOpt) IntSlice added in v0.2.15 

func (s *RootCmdOpt) IntSlice() (opt OptFlag)

func (*RootCmdOpt) Long added in v0.2.15 

func (s *RootCmdOpt) Long(long string) (opt OptCmd)

func (*RootCmdOpt) Name added in v1.6.49 

func (s *RootCmdOpt) Name(name string) (opt OptCmd)

func (*RootCmdOpt) NewFlag added in v0.2.15 

func (s *RootCmdOpt) NewFlag(typ OptFlagType) (opt OptFlag)

func (*RootCmdOpt) NewFlagV added in v1.6.8 

func (s *RootCmdOpt) NewFlagV(defaultValue interface{}, titles ...string) (opt OptFlag)

func (*RootCmdOpt) OwnerCommand added in v0.2.15 

func (s *RootCmdOpt) OwnerCommand() (opt OptCmd)

func (*RootCmdOpt) PostAction added in v0.2.15 

func (s *RootCmdOpt) PostAction(post Invoker) (opt OptCmd)

func (*RootCmdOpt) PreAction added in v0.2.15 

func (s *RootCmdOpt) PreAction(pre Handler) (opt OptCmd)

func (*RootCmdOpt) RootCmdOpt added in v1.7.46 

func (s *RootCmdOpt) RootCmdOpt() (root *RootCmdOpt)

func (*RootCmdOpt) RootCommand added in v0.2.15 

func (s *RootCmdOpt) RootCommand() (root *RootCommand)

func (*RootCmdOpt) RunAsSubCommand added in v1.10.19 

func (s *RootCmdOpt) RunAsSubCommand(dottedPathToSubCommand string) *RootCmdOpt

RunAsSubCommand set RootCommand.RunAsSubCommand field. NOTE that when it's valid, RootCommand.Command.Action handler will be ignored.

func (*RootCmdOpt) SetOwner added in v0.2.15 

func (s *RootCmdOpt) SetOwner(opt OptCmd)

func (*RootCmdOpt) Sets added in v1.10.27 

func (s *RootCmdOpt) Sets(cb func(cmd OptCmd)) (opt OptCmd)

func (*RootCmdOpt) Short added in v0.2.15 

func (s *RootCmdOpt) Short(short string) (opt OptCmd)

func (*RootCmdOpt) String added in v0.2.15 

func (s *RootCmdOpt) String() (opt OptFlag)

func (*RootCmdOpt) StringSlice added in v0.2.15 

func (s *RootCmdOpt) StringSlice() (opt OptFlag)

func (*RootCmdOpt) TailPlaceholder added in v0.2.15 

func (s *RootCmdOpt) TailPlaceholder(placeholders ...string) (opt OptCmd)

func (*RootCmdOpt) Titles added in v0.2.15 

func (s *RootCmdOpt) Titles(long, short string, aliases ...string) (opt OptCmd)

func (*RootCmdOpt) ToCommand added in v1.6.7 

func (s *RootCmdOpt) ToCommand() *Command

func (*RootCmdOpt) Uint added in v0.2.15 

func (s *RootCmdOpt) Uint() (opt OptFlag)

func (*RootCmdOpt) Uint64 added in v0.2.15 

func (s *RootCmdOpt) Uint64() (opt OptFlag)

func (*RootCmdOpt) VendorHidden added in v1.10.19 

func (s *RootCmdOpt) VendorHidden(hidden bool) (opt OptCmd)

type RootCommand 

type RootCommand struct {
	Command `yaml:",inline"`

	AppName    string `yaml:"appname,omitempty" json:"appname,omitempty"`
	Version    string `yaml:"version,omitempty" json:"version,omitempty"`
	VersionInt uint32 `yaml:"version-int,omitempty" json:"version-int,omitempty"`

	Copyright string `yaml:"copyright,omitempty" json:"copyright,omitempty"`
	Author    string `yaml:"author,omitempty" json:"author,omitempty"`
	Header    string `yaml:"header,omitempty" json:"header,omitempty"` // using `Header` for header and ignore built with `Copyright` and `Author`, and no usage lines too.

	// RunAsSubCommand give a subcommand and will be invoked
	// while app enter without any subcommands.
	//
	// For example, RunAsSubCommand is set to "build", and
	// entering "app" will equal to entering "app build ...".
	//
	// NOTE that when it's valid, RootCommand.Command.Action handler will be ignored.
	RunAsSubCommand string `yaml:"run-as,omitempty" json:"run-as,omitempty"`

	// PreActions lists all global pre-actions. They will be launched before
	// any command hit would has been invoking.
	PreActions  []Handler `yaml:"-" json:"-"`
	PostActions []Invoker `yaml:"-" json:"-"`
	// contains filtered or unexported fields
}

RootCommand holds some application information

func (*RootCommand) AppendPostActions added in v1.6.22 

func (c *RootCommand) AppendPostActions(fns ...func(cmd *Command, args []string))

AppendPostActions adds the global post-action to cmdr system

func (*RootCommand) AppendPreActions added in v1.7.46 

func (c *RootCommand) AppendPreActions(fns ...func(cmd *Command, args []string) (err error))

AppendPreActions adds the global pre-action to cmdr system

type TextVar added in v1.10.49 

type TextVar interface {
	encoding.TextMarshaler
	encoding.TextUnmarshaler
}

TextVar _

func GetTextVar added in v1.10.49 

func GetTextVar(key string, defaultVal ...TextVar) TextVar

GetTextVar returns the text-var value of an `Option` key.

func GetTextVarP added in v1.10.49 

func GetTextVarP(prefix, key string, defaultVal ...TextVar) TextVar

GetTextVarP returns the text-var value of an `Option` key.

func GetTextVarR added in v1.10.49 

func GetTextVarR(key string, defaultVal ...TextVar) TextVar

GetTextVarR returns the text-var value of an `Option` key.

func GetTextVarRP added in v1.10.49 

func GetTextVarRP(prefix, key string, defaultVal ...TextVar) TextVar

GetTextVarRP returns the text-var value of an `Option` key.

A 'text-var' is a type which implements these interfaces: 

encoding.TextMarshaler and encoding.TextUnmarshaler

The types typically are: net.IPv4, or time.Time.

type UnhandledErrorHandler added in v1.6.13 

type UnhandledErrorHandler func(err interface{})

UnhandledErrorHandler for WithUnhandledErrorHandler

type UnknownOptionHandler added in v1.5.5 

type UnknownOptionHandler func(isFlag bool, title string, cmd *Command, args []string) (fallbackToDefaultDetector bool)

UnknownOptionHandler for WithSimilarThreshold/SetUnknownOptionHandler

Source Files

View all Source files

Directories

Path Synopsis
Package conf are used to store the app-level constants (app name/vaersion) for cmdr and your app.
 Package conf are used to store the app-level constants (app name/vaersion) for cmdr and your app.
examples
demo
demo/demo
example-app
ffdemo
fluent
fluent/cmdr
internal
short
wget-demo
Package flag is used to wrap some APIs from go stdlib flag
 Package flag is used to wrap some APIs from go stdlib flag
plugin
colortable
demo
isdelve
pprof
Package pprof provides the profiling command-line options and adapts to go tool pprof.
 Package pprof provides the profiling command-line options and adapts to go tool pprof.
randomizer

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