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actshad.dev/cli/v2

Package cli

v2.2.1-0...-7daa3a6
Latest Go to latest

The highest tagged major version is v2.

Published: Aug 5, 2020 | License: MIT | Module: actshad.dev/cli/v2

Overview

Package cli provides a minimal framework for creating and organizing command line Go applications. cli is designed to be easy to understand and write, the most simple cli application can be written as follows:

func main() {
  (&cli.App{}).Run(os.Args)
}

Of course this application does not do much, so let's make this an actual application:

  func main() {
    app := &cli.App{
			 Name: "greet",
			 Usage: "say a greeting",
			 Action: func(c *cli.Context) error {
				 fmt.Println("Greetings")
				 return nil
			 },
		 }

    app.Run(os.Args)
  }

Index

Examples

Variables

var AppHelpTemplate = "" /* 1054 byte string literal not displayed */

AppHelpTemplate is the text template for the Default help topic. cli.go uses text/template to render templates. You can render custom help text by setting this variable.

var CommandHelpTemplate = "" /* 623 byte string literal not displayed */

CommandHelpTemplate is the text template for the command help topic. cli.go uses text/template to render templates. You can render custom help text by setting this variable.

var ErrWriter io.Writer = os.Stderr

ErrWriter is used to write errors to the user. This can be anything implementing the io.Writer interface and defaults to os.Stderr.

var FishCompletionTemplate = "" /* 358 byte string literal not displayed */
var HelpPrinter helpPrinter = printHelp

HelpPrinter is a function that writes the help output. If not set explicitly, this calls HelpPrinterCustom using only the default template functions.

If custom logic for printing help is required, this function can be overridden. If the ExtraInfo field is defined on an App, this function should not be modified, as HelpPrinterCustom will be used directly in order to capture the extra information.

var HelpPrinterCustom helpPrinterCustom = printHelpCustom

HelpPrinterCustom is a function that writes the help output. It is used as the default implementation of HelpPrinter, and may be called directly if the ExtraInfo field is set on an App.

var MarkdownDocTemplate = "" /* 144 byte string literal not displayed */+
	"```" + `
{{ range $v := .SynopsisArgs }}{{ $v }}{{ end }}` + "```" + `
{{ end }}{{ if .App.UsageText }}
# DESCRIPTION

{{ .App.UsageText }}
{{ end }}
**Usage**:

` + "```" + `
{{ .App.Name }} [GLOBAL OPTIONS] command [COMMAND OPTIONS] [ARGUMENTS...]

` + "```" + "" /* 180 byte string literal not displayed */
var OsExiter = os.Exit

OsExiter is the function used when the app exits. If not set defaults to os.Exit.

var SubcommandHelpTemplate = "" /* 819 byte string literal not displayed */

SubcommandHelpTemplate is the text template for the subcommand help topic. cli.go uses text/template to render templates. You can render custom help text by setting this variable.

var VersionPrinter = printVersion

VersionPrinter prints the version for the App

func DefaultAppComplete

func DefaultAppComplete(c *Context)

DefaultAppComplete prints the list of subcommands as the default app completion method

func DefaultCompleteWithFlags

func DefaultCompleteWithFlags(cmd *Command) func(c *Context)

func HandleAction

func HandleAction(action interface{}, context *Context) (err error)

HandleAction attempts to figure out which Action signature was used. If it's an ActionFunc or a func with the legacy signature for Action, the func is run!

func HandleExitCoder

func HandleExitCoder(err error)

HandleExitCoder checks if the error fulfills the ExitCoder interface, and if so prints the error to stderr (if it is non-empty) and calls OsExiter with the given exit code. If the given error is a MultiError, then this func is called on all members of the Errors slice and calls OsExiter with the last exit code.

func ShowAppHelp

func ShowAppHelp(c *Context) error

ShowAppHelp is an action that displays the help.

func ShowAppHelpAndExit

func ShowAppHelpAndExit(c *Context, exitCode int)

ShowAppHelpAndExit - Prints the list of subcommands for the app and exits with exit code.

func ShowCommandCompletions

func ShowCommandCompletions(ctx *Context, command string)

ShowCommandCompletions prints the custom completions for a given command

func ShowCommandHelp

func ShowCommandHelp(ctx *Context, command string) error

ShowCommandHelp prints help for the given command

func ShowCommandHelpAndExit

func ShowCommandHelpAndExit(c *Context, command string, code int)

ShowCommandHelpAndExit - exits with code after showing help

func ShowCompletions

func ShowCompletions(c *Context)

ShowCompletions prints the lists of commands within a given context

func ShowSubcommandHelp

func ShowSubcommandHelp(c *Context) error

ShowSubcommandHelp prints help for the given subcommand

func ShowVersion

func ShowVersion(c *Context)

ShowVersion prints the version number of the App

type ActionFunc

type ActionFunc func(*Context) error

ActionFunc is the action to execute when no subcommands are specified

type AfterFunc

type AfterFunc func(*Context) error

AfterFunc is an action to execute after any subcommands are run, but after the subcommand has finished it is run even if Action() panics

type App

type App struct {
	// The name of the program. Defaults to path.Base(os.Args[0])
	Name string
	// Full name of command for help, defaults to Name
	HelpName string
	// Description of the program.
	Usage string
	// Text to override the USAGE section of help
	UsageText string
	// Description of the program argument format.
	ArgsUsage string
	// Version of the program
	Version string
	// Description of the program
	Description string
	// List of commands to execute
	Commands []*Command
	// List of flags to parse
	Flags []Flag
	// Boolean to enable bash completion commands
	EnableBashCompletion bool
	// Boolean to hide built-in help command and help flag
	HideHelp bool
	// Boolean to hide built-in help command but keep help flag.
	// Ignored if HideHelp is true.
	HideHelpCommand bool
	// Boolean to hide built-in version flag and the VERSION section of help
	HideVersion bool

	// An action to execute when the shell completion flag is set
	BashComplete BashCompleteFunc
	// An action to execute before any subcommands are run, but after the context is ready
	// If a non-nil error is returned, no subcommands are run
	Before BeforeFunc
	// An action to execute after any subcommands are run, but after the subcommand has finished
	// It is run even if Action() panics
	After AfterFunc
	// The action to execute when no subcommands are specified
	Action ActionFunc
	// Execute this function if the proper command cannot be found
	CommandNotFound CommandNotFoundFunc
	// Execute this function if an usage error occurs
	OnUsageError OnUsageErrorFunc
	// Compilation date
	Compiled time.Time
	// List of all authors who contributed
	Authors []*Author
	// Copyright of the binary if any
	Copyright string
	// Writer writer to write output to
	Writer io.Writer
	// ErrWriter writes error output
	ErrWriter io.Writer
	// Execute this function to handle ExitErrors. If not provided, HandleExitCoder is provided to
	// function as a default, so this is optional.
	ExitErrHandler ExitErrHandlerFunc
	// Other custom info
	Metadata map[string]interface{}
	// Carries a function which returns app specific info.
	ExtraInfo func() map[string]string
	// CustomAppHelpTemplate the text template for app help topic.
	// cli.go uses text/template to render templates. You can
	// render custom help text by setting this variable.
	CustomAppHelpTemplate string
	// Boolean to enable short-option handling so user can combine several
	// single-character bool arguments into one
	// i.e. foobar -o -v -> foobar -ov
	UseShortOptionHandling bool
	// contains filtered or unexported fields
}

App is the main structure of a cli application. It is recommended that an app be created with the cli.NewApp() function

func NewApp

func NewApp() *App

NewApp creates a new cli Application with some reasonable defaults for Name, Usage, Version and Action.

func (*App) Command

func (a *App) Command(name string) *Command

Command returns the named command on App. Returns nil if the command does not exist

func (*App) Run

func (a *App) Run(arguments []string) (err error)

Run is the entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination

Example

Code:

// set args for examples sake
os.Args = []string{"greet", "--name", "Jeremy"}

app := &App{
	Name: "greet",
	Flags: []Flag{
		&StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
	},
	Action: func(c *Context) error {
		fmt.Printf("Hello %v\n", c.String("name"))
		return nil
	},
	UsageText: "app [first_arg] [second_arg]",
	Authors:   []*Author{{Name: "Oliver Allen", Email: "oliver@toyshop.example.com"}},
}

app.Run(os.Args)
Hello Jeremy
Example (AppHelp)

Code:

// set args for examples sake
os.Args = []string{"greet", "help"}

app := &App{
	Name:        "greet",
	Version:     "0.1.0",
	Description: "This is how we describe greet the app",
	Authors: []*Author{
		{Name: "Harrison", Email: "harrison@lolwut.com"},
		{Name: "Oliver Allen", Email: "oliver@toyshop.com"},
	},
	Flags: []Flag{
		&StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
	},
	Commands: []*Command{
		{
			Name:        "describeit",
			Aliases:     []string{"d"},
			Usage:       "use it to see a description",
			Description: "This is how we describe describeit the function",
			Action: func(c *Context) error {
				fmt.Printf("i like to describe things")
				return nil
			},
		},
	},
}
_ = app.Run(os.Args)
NAME:
   greet - A new cli application

USAGE:
   greet [global options] command [command options] [arguments...]

VERSION:
   0.1.0

DESCRIPTION:
   This is how we describe greet the app

AUTHORS:
   Harrison <harrison@lolwut.com>
   Oliver Allen <oliver@toyshop.com>

COMMANDS:
   describeit, d  use it to see a description
   help, h        Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --name value   a name to say (default: "bob")
   --help, -h     show help (default: false)
   --version, -v  print the version (default: false)
Example (BashComplete)

Code:

// set args for examples sake
// set args for examples sake
os.Args = []string{"greet", "--generate-bash-completion"}

app := &App{
	Name:                 "greet",
	EnableBashCompletion: true,
	Commands: []*Command{
		{
			Name:        "describeit",
			Aliases:     []string{"d"},
			Usage:       "use it to see a description",
			Description: "This is how we describe describeit the function",
			Action: func(c *Context) error {
				fmt.Printf("i like to describe things")
				return nil
			},
		}, {
			Name:        "next",
			Usage:       "next example",
			Description: "more stuff to see when generating shell completion",
			Action: func(c *Context) error {
				fmt.Printf("the next example")
				return nil
			},
		},
	},
}

_ = app.Run(os.Args)
describeit
d
next
help
h
Example (BashComplete_withLongFlag)

Code:

os.Args = []string{"greet", "--s", "--generate-bash-completion"}

app := NewApp()
app.Name = "greet"
app.EnableBashCompletion = true
app.Flags = []Flag{
	&IntFlag{
		Name:    "other",
		Aliases: []string{"o"},
	},
	&StringFlag{
		Name:    "xyz",
		Aliases: []string{"x"},
	},
	&StringFlag{
		Name: "some-flag,s",
	},
	&StringFlag{
		Name: "similar-flag",
	},
}

_ = app.Run(os.Args)
--some-flag
--similar-flag
Example (BashComplete_withMultipleLongFlag)

Code:

os.Args = []string{"greet", "--st", "--generate-bash-completion"}

app := NewApp()
app.Name = "greet"
app.EnableBashCompletion = true
app.Flags = []Flag{
	&IntFlag{
		Name:    "int-flag",
		Aliases: []string{"i"},
	},
	&StringFlag{
		Name:    "string",
		Aliases: []string{"s"},
	},
	&StringFlag{
		Name: "string-flag-2",
	},
	&StringFlag{
		Name: "similar-flag",
	},
	&StringFlag{
		Name: "some-flag",
	},
}

_ = app.Run(os.Args)
--string
--string-flag-2
Example (BashComplete_withShortFlag)

Code:

os.Args = []string{"greet", "-", "--generate-bash-completion"}

app := NewApp()
app.Name = "greet"
app.EnableBashCompletion = true
app.Flags = []Flag{
	&IntFlag{
		Name:    "other",
		Aliases: []string{"o"},
	},
	&StringFlag{
		Name:    "xyz",
		Aliases: []string{"x"},
	},
}

_ = app.Run(os.Args)
--other
-o
--xyz
-x
--help
-h
Example (CommandHelp)

Code:

// set args for examples sake
os.Args = []string{"greet", "h", "describeit"}

app := &App{
	Name: "greet",
	Flags: []Flag{
		&StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
	},
	Commands: []*Command{
		{
			Name:        "describeit",
			Aliases:     []string{"d"},
			Usage:       "use it to see a description",
			Description: "This is how we describe describeit the function",
			Action: func(c *Context) error {
				fmt.Printf("i like to describe things")
				return nil
			},
		},
	},
}
_ = app.Run(os.Args)
NAME:
   greet describeit - use it to see a description

USAGE:
   greet describeit [arguments...]

DESCRIPTION:
   This is how we describe describeit the function
Example (NoAction)

Code:

app := App{}
app.Name = "greet"
_ = app.Run([]string{"greet"})
NAME:
   greet - A new cli application

USAGE:
   greet [global options] command [command options] [arguments...]

COMMANDS:
   help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --help, -h  show help (default: false)
Example (Subcommand)

Code:

// set args for examples sake
os.Args = []string{"say", "hi", "english", "--name", "Jeremy"}
app := &App{
	Name: "say",
	Commands: []*Command{
		{
			Name:        "hello",
			Aliases:     []string{"hi"},
			Usage:       "use it to see a description",
			Description: "This is how we describe hello the function",
			Subcommands: []*Command{
				{
					Name:        "english",
					Aliases:     []string{"en"},
					Usage:       "sends a greeting in english",
					Description: "greets someone in english",
					Flags: []Flag{
						&StringFlag{
							Name:  "name",
							Value: "Bob",
							Usage: "Name of the person to greet",
						},
					},
					Action: func(c *Context) error {
						fmt.Println("Hello,", c.String("name"))
						return nil
					},
				},
			},
		},
	},
}

_ = app.Run(os.Args)
Hello, Jeremy
Example (SubcommandNoAction)

Code:

app := &App{
	Name: "greet",
	Commands: []*Command{
		{
			Name:        "describeit",
			Aliases:     []string{"d"},
			Usage:       "use it to see a description",
			Description: "This is how we describe describeit the function",
		},
	},
}
_ = app.Run([]string{"greet", "describeit"})
NAME:
   greet describeit - use it to see a description

USAGE:
   greet describeit [command options] [arguments...]

DESCRIPTION:
   This is how we describe describeit the function

OPTIONS:
   --help, -h  show help (default: false)
Example (ZshComplete)

Code:

// set args for examples sake
os.Args = []string{"greet", "--generate-bash-completion"}
_ = os.Setenv("_CLI_ZSH_AUTOCOMPLETE_HACK", "1")

app := NewApp()
app.Name = "greet"
app.EnableBashCompletion = true
app.Commands = []*Command{
	{
		Name:        "describeit",
		Aliases:     []string{"d"},
		Usage:       "use it to see a description",
		Description: "This is how we describe describeit the function",
		Action: func(c *Context) error {
			fmt.Printf("i like to describe things")
			return nil
		},
	}, {
		Name:        "next",
		Usage:       "next example",
		Description: "more stuff to see when generating bash completion",
		Action: func(c *Context) error {
			fmt.Printf("the next example")
			return nil
		},
	},
}

_ = app.Run(os.Args)
describeit:use it to see a description
d:use it to see a description
next:next example
help:Shows a list of commands or help for one command
h:Shows a list of commands or help for one command

func (*App) RunAndExitOnError

func (a *App) RunAndExitOnError()

RunAndExitOnError calls .Run() and exits non-zero if an error was returned

Deprecated: instead you should return an error that fulfills cli.ExitCoder to cli.App.Run. This will cause the application to exit with the given eror code in the cli.ExitCoder

func (*App) RunAsSubcommand

func (a *App) RunAsSubcommand(ctx *Context) (err error)

RunAsSubcommand invokes the subcommand given the context, parses ctx.Args() to generate command-specific flags

func (*App) RunContext

func (a *App) RunContext(ctx context.Context, arguments []string) (err error)

RunContext is like Run except it takes a Context that will be passed to its commands and sub-commands. Through this, you can propagate timeouts and cancellation requests

func (*App) Setup

func (a *App) Setup()

Setup runs initialization code to ensure all data structures are ready for `Run` or inspection prior to `Run`. It is internally called by `Run`, but will return early if setup has already happened.

func (*App) ToFishCompletion

func (a *App) ToFishCompletion() (string, error)

ToFishCompletion creates a fish completion string for the `*App` The function errors if either parsing or writing of the string fails.

func (*App) ToMan

func (a *App) ToMan() (string, error)

ToMan creates a man page string for the `*App` The function errors if either parsing or writing of the string fails.

func (*App) ToMarkdown

func (a *App) ToMarkdown() (string, error)

ToMarkdown creates a markdown string for the `*App` The function errors if either parsing or writing of the string fails.

func (*App) VisibleCategories

func (a *App) VisibleCategories() []CommandCategory

VisibleCategories returns a slice of categories and commands that are Hidden=false

func (*App) VisibleCommands

func (a *App) VisibleCommands() []*Command

VisibleCommands returns a slice of the Commands with Hidden=false

func (*App) VisibleFlags

func (a *App) VisibleFlags() []Flag

VisibleFlags returns a slice of the Flags with Hidden=false

type Args

type Args interface {
	// Get returns the nth argument, or else a blank string
	Get(n int) string
	// First returns the first argument, or else a blank string
	First() string
	// Tail returns the rest of the arguments (not the first one)
	// or else an empty string slice
	Tail() []string
	// Len returns the length of the wrapped slice
	Len() int
	// Present checks if there are any arguments present
	Present() bool
	// Slice returns a copy of the internal slice
	Slice() []string
}

type Author

type Author struct {
	Name  string // The Authors name
	Email string // The Authors email
}

Author represents someone who has contributed to a cli project.

func (*Author) String

func (a *Author) String() string

String makes Author comply to the Stringer interface, to allow an easy print in the templating process

type BashCompleteFunc

type BashCompleteFunc func(*Context)

BashCompleteFunc is an action to execute when the shell completion flag is set

type BeforeFunc

type BeforeFunc func(*Context) error

BeforeFunc is an action to execute before any subcommands are run, but after the context is ready if a non-nil error is returned, no subcommands are run

type BoolFlag

type BoolFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       bool
	DefaultText string
	Destination *bool
	HasBeenSet  bool
}

BoolFlag is a flag with type bool

func (*BoolFlag) Apply

func (f *BoolFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*BoolFlag) GetUsage

func (f *BoolFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*BoolFlag) GetValue

func (f *BoolFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*BoolFlag) IsRequired

func (f *BoolFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*BoolFlag) IsSet

func (f *BoolFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*BoolFlag) Names

func (f *BoolFlag) Names() []string

Names returns the names of the flag

func (*BoolFlag) String

func (f *BoolFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*BoolFlag) TakesValue

func (f *BoolFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type Command

type Command struct {
	// The name of the command
	Name string
	// A list of aliases for the command
	Aliases []string
	// A short description of the usage of this command
	Usage string
	// Custom text to show on USAGE section of help
	UsageText string
	// A longer explanation of how the command works
	Description string
	// A short description of the arguments of this command
	ArgsUsage string
	// The category the command is part of
	Category string
	// The function to call when checking for bash command completions
	BashComplete BashCompleteFunc
	// An action to execute before any sub-subcommands are run, but after the context is ready
	// If a non-nil error is returned, no sub-subcommands are run
	Before BeforeFunc
	// An action to execute after any subcommands are run, but after the subcommand has finished
	// It is run even if Action() panics
	After AfterFunc
	// The function to call when this command is invoked
	Action ActionFunc
	// Execute this function if a usage error occurs.
	OnUsageError OnUsageErrorFunc
	// List of child commands
	Subcommands []*Command
	// List of flags to parse
	Flags []Flag
	// Treat all flags as normal arguments if true
	SkipFlagParsing bool
	// Boolean to hide built-in help command and help flag
	HideHelp bool
	// Boolean to hide built-in help command but keep help flag
	// Ignored if HideHelp is true.
	HideHelpCommand bool
	// Boolean to hide this command from help or completion
	Hidden bool
	// Boolean to enable short-option handling so user can combine several
	// single-character bool arguments into one
	// i.e. foobar -o -v -> foobar -ov
	UseShortOptionHandling bool

	// Full name of command for help, defaults to full command name, including parent commands.
	HelpName string

	// CustomHelpTemplate the text template for the command help topic.
	// cli.go uses text/template to render templates. You can
	// render custom help text by setting this variable.
	CustomHelpTemplate string
	// contains filtered or unexported fields
}

Command is a subcommand for a cli.App.

func (*Command) FullName

func (c *Command) FullName() string

FullName returns the full name of the command. For subcommands this ensures that parent commands are part of the command path

func (*Command) HasName

func (c *Command) HasName(name string) bool

HasName returns true if Command.Name matches given name

func (*Command) Names

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

Names returns the names including short names and aliases.

func (*Command) Run

func (c *Command) Run(ctx *Context) (err error)

Run invokes the command given the context, parses ctx.Args() to generate command-specific flags

func (*Command) VisibleFlags

func (c *Command) VisibleFlags() []Flag

VisibleFlags returns a slice of the Flags with Hidden=false

type CommandCategories

type CommandCategories interface {
	// AddCommand adds a command to a category, creating a new category if necessary.
	AddCommand(category string, command *Command)
	// categories returns a copy of the category slice
	Categories() []CommandCategory
}

CommandCategories interface allows for category manipulation

type CommandCategory

type CommandCategory interface {
	// Name returns the category name string
	Name() string
	// VisibleCommands returns a slice of the Commands with Hidden=false
	VisibleCommands() []*Command
}

CommandCategory is a category containing commands.

type CommandNotFoundFunc

type CommandNotFoundFunc func(*Context, string)

CommandNotFoundFunc is executed if the proper command cannot be found

type Commands

type Commands []*Command

type CommandsByName

type CommandsByName []*Command

func (CommandsByName) Len

func (c CommandsByName) Len() int

func (CommandsByName) Less

func (c CommandsByName) Less(i, j int) bool

func (CommandsByName) Swap

func (c CommandsByName) Swap(i, j int)

type Context

type Context struct {
	context.Context
	App     *App
	Command *Command
	// contains filtered or unexported fields
}

Context is a type that is passed through to each Handler action in a cli application. Context can be used to retrieve context-specific args and parsed command-line options.

func NewContext

func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context

NewContext creates a new context. For use in when invoking an App or Command action.

func (*Context) Args

func (c *Context) Args() Args

Args returns the command line arguments associated with the context.

func (*Context) Bool

func (c *Context) Bool(name string) bool

Bool looks up the value of a local BoolFlag, returns false if not found

func (*Context) Duration

func (c *Context) Duration(name string) time.Duration

Duration looks up the value of a local DurationFlag, returns 0 if not found

func (*Context) FlagNames

func (c *Context) FlagNames() []string

FlagNames returns a slice of flag names used by the this context and all of its parent contexts.

func (*Context) Float64

func (c *Context) Float64(name string) float64

Float64 looks up the value of a local Float64Flag, returns 0 if not found

func (*Context) Float64Slice

func (c *Context) Float64Slice(name string) []float64

Float64Slice looks up the value of a local Float64SliceFlag, returns nil if not found

func (*Context) Generic

func (c *Context) Generic(name string) interface{}

Generic looks up the value of a local GenericFlag, returns nil if not found

func (*Context) Int

func (c *Context) Int(name string) int

Int looks up the value of a local IntFlag, returns 0 if not found

func (*Context) Int64

func (c *Context) Int64(name string) int64

Int64 looks up the value of a local Int64Flag, returns 0 if not found

func (*Context) Int64Slice

func (c *Context) Int64Slice(name string) []int64

Int64Slice looks up the value of a local Int64SliceFlag, returns nil if not found

func (*Context) IntSlice

func (c *Context) IntSlice(name string) []int

IntSlice looks up the value of a local IntSliceFlag, returns nil if not found

func (*Context) IsSet

func (c *Context) IsSet(name string) bool

IsSet determines if the flag was actually set

func (*Context) Lineage

func (c *Context) Lineage() []*Context

Lineage returns *this* context and all of its ancestor contexts in order from child to parent

func (*Context) LocalFlagNames

func (c *Context) LocalFlagNames() []string

LocalFlagNames returns a slice of flag names used in this context.

func (*Context) NArg

func (c *Context) NArg() int

NArg returns the number of the command line arguments.

func (*Context) NumFlags

func (c *Context) NumFlags() int

NumFlags returns the number of flags set

func (*Context) Path

func (c *Context) Path(name string) string

Path looks up the value of a local PathFlag, returns "" if not found

func (*Context) Set

func (c *Context) Set(name, value string) error

Set sets a context flag to a value.

func (*Context) String

func (c *Context) String(name string) string

String looks up the value of a local StringFlag, returns "" if not found

func (*Context) StringSlice

func (c *Context) StringSlice(name string) []string

StringSlice looks up the value of a local StringSliceFlag, returns nil if not found

func (*Context) Timestamp

func (c *Context) Timestamp(name string) *time.Time

Timestamp gets the timestamp from a flag name

func (*Context) Uint

func (c *Context) Uint(name string) uint

Uint looks up the value of a local UintFlag, returns 0 if not found

func (*Context) Uint64

func (c *Context) Uint64(name string) uint64

Uint64 looks up the value of a local Uint64Flag, returns 0 if not found

func (*Context) Value

func (c *Context) Value(name string) interface{}

Value returns the value of the flag corresponding to `name`

type DocGenerationFlag

type DocGenerationFlag interface {
	Flag

	// TakesValue returns true if the flag takes a value, otherwise false
	TakesValue() bool

	// GetUsage returns the usage string for the flag
	GetUsage() string

	// GetValue returns the flags value as string representation and an empty
	// string if the flag takes no value at all.
	GetValue() string
}

DocGenerationFlag is an interface that allows documentation generation for the flag

type DurationFlag

type DurationFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       time.Duration
	DefaultText string
	Destination *time.Duration
	HasBeenSet  bool
}

DurationFlag is a flag with type time.Duration (see https://golang.org/pkg/time/#ParseDuration)

func (*DurationFlag) Apply

func (f *DurationFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*DurationFlag) GetUsage

func (f *DurationFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*DurationFlag) GetValue

func (f *DurationFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*DurationFlag) IsRequired

func (f *DurationFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*DurationFlag) IsSet

func (f *DurationFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*DurationFlag) Names

func (f *DurationFlag) Names() []string

Names returns the names of the flag

func (*DurationFlag) String

func (f *DurationFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*DurationFlag) TakesValue

func (f *DurationFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type ErrorFormatter

type ErrorFormatter interface {
	Format(s fmt.State, verb rune)
}

ErrorFormatter is the interface that will suitably format the error output

type ExitCoder

type ExitCoder interface {
	error
	ExitCode() int
}

ExitCoder is the interface checked by `App` and `Command` for a custom exit code

func Exit

func Exit(message interface{}, exitCode int) ExitCoder

Exit wraps a message and exit code into an ExitCoder suitable for handling by HandleExitCoder

func NewExitError

func NewExitError(message interface{}, exitCode int) ExitCoder

NewExitError makes a new *exitError

type ExitErrHandlerFunc

type ExitErrHandlerFunc func(context *Context, err error)

ExitErrHandlerFunc is executed if provided in order to handle exitError values returned by Actions and Before/After functions.

type Flag

type Flag interface {
	fmt.Stringer
	// Apply Flag settings to the given flag set
	Apply(*flag.FlagSet) error
	Names() []string
	IsSet() bool
}

Flag is a common interface related to parsing flags in cli. For more advanced flag parsing techniques, it is recommended that this interface be implemented.

var BashCompletionFlag Flag = &BoolFlag{
	Name:   "generate-bash-completion",
	Hidden: true,
}

BashCompletionFlag enables bash-completion for all commands and subcommands

var HelpFlag Flag = &BoolFlag{
	Name:    "help",
	Aliases: []string{"h"},
	Usage:   "show help",
}

HelpFlag prints the help for all commands and subcommands. Set to nil to disable the flag. The subcommand will still be added unless HideHelp or HideHelpCommand is set to true.

var VersionFlag Flag = &BoolFlag{
	Name:    "version",
	Aliases: []string{"v"},
	Usage:   "print the version",
}

VersionFlag prints the version for the application

type FlagEnvHintFunc

type FlagEnvHintFunc func(envVars []string, str string) string

FlagEnvHintFunc is used by the default FlagStringFunc to annotate flag help with the environment variable details.

var FlagEnvHinter FlagEnvHintFunc = withEnvHint

FlagEnvHinter annotates flag help message with the environment variable details. This is used by the default FlagStringer.

type FlagFileHintFunc

type FlagFileHintFunc func(filePath, str string) string

FlagFileHintFunc is used by the default FlagStringFunc to annotate flag help with the file path details.

var FlagFileHinter FlagFileHintFunc = withFileHint

FlagFileHinter annotates flag help message with the environment variable details. This is used by the default FlagStringer.

type FlagNamePrefixFunc

type FlagNamePrefixFunc func(fullName []string, placeholder string) string

FlagNamePrefixFunc is used by the default FlagStringFunc to create prefix text for a flag's full name.

var FlagNamePrefixer FlagNamePrefixFunc = prefixedNames

FlagNamePrefixer converts a full flag name and its placeholder into the help message flag prefix. This is used by the default FlagStringer.

type FlagStringFunc

type FlagStringFunc func(Flag) string

FlagStringFunc is used by the help generation to display a flag, which is expected to be a single line.

var FlagStringer FlagStringFunc = stringifyFlag

FlagStringer converts a flag definition to a string. This is used by help to display a flag.

type FlagsByName

type FlagsByName []Flag

FlagsByName is a slice of Flag.

func (FlagsByName) Len

func (f FlagsByName) Len() int

func (FlagsByName) Less

func (f FlagsByName) Less(i, j int) bool

func (FlagsByName) Swap

func (f FlagsByName) Swap(i, j int)

type Float64Flag

type Float64Flag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       float64
	DefaultText string
	Destination *float64
	HasBeenSet  bool
}

Float64Flag is a flag with type float64

func (*Float64Flag) Apply

func (f *Float64Flag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*Float64Flag) GetUsage

func (f *Float64Flag) GetUsage() string

GetUsage returns the usage string for the flag

func (*Float64Flag) GetValue

func (f *Float64Flag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*Float64Flag) IsRequired

func (f *Float64Flag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*Float64Flag) IsSet

func (f *Float64Flag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*Float64Flag) Names

func (f *Float64Flag) Names() []string

Names returns the names of the flag

func (*Float64Flag) String

func (f *Float64Flag) String() string

String returns a readable representation of this value (for usage defaults)

func (*Float64Flag) TakesValue

func (f *Float64Flag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type Float64Slice

type Float64Slice struct {
	// contains filtered or unexported fields
}

Float64Slice wraps []float64 to satisfy flag.Value

func NewFloat64Slice

func NewFloat64Slice(defaults ...float64) *Float64Slice

NewFloat64Slice makes a *Float64Slice with default values

func (*Float64Slice) Get

func (f *Float64Slice) Get() interface{}

Get returns the slice of float64s set by this flag

func (*Float64Slice) Serialize

func (f *Float64Slice) Serialize() string

Serialize allows Float64Slice to fulfill Serializer

func (*Float64Slice) Set

func (f *Float64Slice) Set(value string) error

Set parses the value into a float64 and appends it to the list of values

func (*Float64Slice) String

func (f *Float64Slice) String() string

String returns a readable representation of this value (for usage defaults)

func (*Float64Slice) Value

func (f *Float64Slice) Value() []float64

Value returns the slice of float64s set by this flag

type Float64SliceFlag

type Float64SliceFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       *Float64Slice
	DefaultText string
	HasBeenSet  bool
}

Float64SliceFlag is a flag with type *Float64Slice

func (*Float64SliceFlag) Apply

func (f *Float64SliceFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*Float64SliceFlag) GetUsage

func (f *Float64SliceFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*Float64SliceFlag) GetValue

func (f *Float64SliceFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*Float64SliceFlag) IsRequired

func (f *Float64SliceFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*Float64SliceFlag) IsSet

func (f *Float64SliceFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*Float64SliceFlag) Names

func (f *Float64SliceFlag) Names() []string

Names returns the names of the flag

func (*Float64SliceFlag) String

func (f *Float64SliceFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*Float64SliceFlag) TakesValue

func (f *Float64SliceFlag) TakesValue() bool

TakesValue returns true if the flag takes a value, otherwise false

type Generic

type Generic interface {
	Set(value string) error
	String() string
}

Generic is a generic parseable type identified by a specific flag

type GenericFlag

type GenericFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	TakesFile   bool
	Value       Generic
	DefaultText string
	HasBeenSet  bool
}

GenericFlag is a flag with type Generic

func (GenericFlag) Apply

func (f GenericFlag) Apply(set *flag.FlagSet) error

Apply takes the flagset and calls Set on the generic flag with the value provided by the user for parsing by the flag

func (*GenericFlag) GetUsage

func (f *GenericFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*GenericFlag) GetValue

func (f *GenericFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*GenericFlag) IsRequired

func (f *GenericFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*GenericFlag) IsSet

func (f *GenericFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*GenericFlag) Names

func (f *GenericFlag) Names() []string

Names returns the names of the flag

func (*GenericFlag) String

func (f *GenericFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*GenericFlag) TakesValue

func (f *GenericFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type Int64Flag

type Int64Flag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       int64
	DefaultText string
	Destination *int64
	HasBeenSet  bool
}

Int64Flag is a flag with type int64

func (*Int64Flag) Apply

func (f *Int64Flag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*Int64Flag) GetUsage

func (f *Int64Flag) GetUsage() string

GetUsage returns the usage string for the flag

func (*Int64Flag) GetValue

func (f *Int64Flag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*Int64Flag) IsRequired

func (f *Int64Flag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*Int64Flag) IsSet

func (f *Int64Flag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*Int64Flag) Names

func (f *Int64Flag) Names() []string

Names returns the names of the flag

func (*Int64Flag) String

func (f *Int64Flag) String() string

String returns a readable representation of this value (for usage defaults)

func (*Int64Flag) TakesValue

func (f *Int64Flag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type Int64Slice

type Int64Slice struct {
	// contains filtered or unexported fields
}

Int64Slice wraps []int64 to satisfy flag.Value

func NewInt64Slice

func NewInt64Slice(defaults ...int64) *Int64Slice

NewInt64Slice makes an *Int64Slice with default values

func (*Int64Slice) Get

func (i *Int64Slice) Get() interface{}

Get returns the slice of ints set by this flag

func (*Int64Slice) Serialize

func (i *Int64Slice) Serialize() string

Serialize allows Int64Slice to fulfill Serializer

func (*Int64Slice) Set

func (i *Int64Slice) Set(value string) error

Set parses the value into an integer and appends it to the list of values

func (*Int64Slice) String

func (i *Int64Slice) String() string

String returns a readable representation of this value (for usage defaults)

func (*Int64Slice) Value

func (i *Int64Slice) Value() []int64

Value returns the slice of ints set by this flag

type Int64SliceFlag

type Int64SliceFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       *Int64Slice
	DefaultText string
	HasBeenSet  bool
}

Int64SliceFlag is a flag with type *Int64Slice

func (*Int64SliceFlag) Apply

func (f *Int64SliceFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (Int64SliceFlag) GetUsage

func (f Int64SliceFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*Int64SliceFlag) GetValue

func (f *Int64SliceFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*Int64SliceFlag) IsRequired

func (f *Int64SliceFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*Int64SliceFlag) IsSet

func (f *Int64SliceFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*Int64SliceFlag) Names

func (f *Int64SliceFlag) Names() []string

Names returns the names of the flag

func (*Int64SliceFlag) String

func (f *Int64SliceFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*Int64SliceFlag) TakesValue

func (f *Int64SliceFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type IntFlag

type IntFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       int
	DefaultText string
	Destination *int
	HasBeenSet  bool
}

IntFlag is a flag with type int

func (*IntFlag) Apply

func (f *IntFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*IntFlag) GetUsage

func (f *IntFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*IntFlag) GetValue

func (f *IntFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*IntFlag) IsRequired

func (f *IntFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*IntFlag) IsSet

func (f *IntFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*IntFlag) Names

func (f *IntFlag) Names() []string

Names returns the names of the flag

func (*IntFlag) String

func (f *IntFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*IntFlag) TakesValue

func (f *IntFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type IntSlice

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

IntSlice wraps []int to satisfy flag.Value

func NewIntSlice

func NewIntSlice(defaults ...int) *IntSlice

NewIntSlice makes an *IntSlice with default values

func (*IntSlice) Get

func (i *IntSlice) Get() interface{}

Get returns the slice of ints set by this flag

func (*IntSlice) Serialize

func (i *IntSlice) Serialize() string

Serialize allows IntSlice to fulfill Serializer

func (*IntSlice) Set

func (i *IntSlice) Set(value string) error

Set parses the value into an integer and appends it to the list of values

func (*IntSlice) SetInt

func (i *IntSlice) SetInt(value int)

TODO: Consistently have specific Set function for Int64 and Float64 ? SetInt directly adds an integer to the list of values

func (*IntSlice) String

func (i *IntSlice) String() string

String returns a readable representation of this value (for usage defaults)

func (*IntSlice) Value

func (i *IntSlice) Value() []int

Value returns the slice of ints set by this flag

type IntSliceFlag

type IntSliceFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       *IntSlice
	DefaultText string
	HasBeenSet  bool
}

IntSliceFlag is a flag with type *IntSlice

func (*IntSliceFlag) Apply

func (f *IntSliceFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (IntSliceFlag) GetUsage

func (f IntSliceFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*IntSliceFlag) GetValue

func (f *IntSliceFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*IntSliceFlag) IsRequired

func (f *IntSliceFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*IntSliceFlag) IsSet

func (f *IntSliceFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*IntSliceFlag) Names

func (f *IntSliceFlag) Names() []string

Names returns the names of the flag

func (*IntSliceFlag) String

func (f *IntSliceFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*IntSliceFlag) TakesValue

func (f *IntSliceFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type MultiError

type MultiError interface {
	error
	// Errors returns a copy of the errors slice
	Errors() []error
}

MultiError is an error that wraps multiple errors.

type OnUsageErrorFunc

type OnUsageErrorFunc func(context *Context, err error, isSubcommand bool) error

OnUsageErrorFunc is executed if an usage error occurs. This is useful for displaying customized usage error messages. This function is able to replace the original error messages. If this function is not set, the "Incorrect usage" is displayed and the execution is interrupted.

type PathFlag

type PathFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	TakesFile   bool
	Value       string
	DefaultText string
	Destination *string
	HasBeenSet  bool
}

func (*PathFlag) Apply

func (f *PathFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*PathFlag) GetUsage

func (f *PathFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*PathFlag) GetValue

func (f *PathFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*PathFlag) IsRequired

func (f *PathFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*PathFlag) IsSet

func (f *PathFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*PathFlag) Names

func (f *PathFlag) Names() []string

Names returns the names of the flag

func (*PathFlag) String

func (f *PathFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*PathFlag) TakesValue

func (f *PathFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type RequiredFlag

type RequiredFlag interface {
	Flag

	IsRequired() bool
}

RequiredFlag is an interface that allows us to mark flags as required it allows flags required flags to be backwards compatible with the Flag interface

type Serializer

type Serializer interface {
	Serialize() string
}

Serializer is used to circumvent the limitations of flag.FlagSet.Set

type StringFlag

type StringFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	TakesFile   bool
	Value       string
	DefaultText string
	Destination *string
	HasBeenSet  bool
}

StringFlag is a flag with type string

func (*StringFlag) Apply

func (f *StringFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*StringFlag) GetUsage

func (f *StringFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*StringFlag) GetValue

func (f *StringFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*StringFlag) IsRequired

func (f *StringFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*StringFlag) IsSet

func (f *StringFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*StringFlag) Names

func (f *StringFlag) Names() []string

Names returns the names of the flag

func (*StringFlag) String

func (f *StringFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*StringFlag) TakesValue

func (f *StringFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type StringSlice

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

StringSlice wraps a []string to satisfy flag.Value

func NewStringSlice

func NewStringSlice(defaults ...string) *StringSlice

NewStringSlice creates a *StringSlice with default values

func (*StringSlice) Get

func (s *StringSlice) Get() interface{}

Get returns the slice of strings set by this flag

func (*StringSlice) Serialize

func (s *StringSlice) Serialize() string

Serialize allows StringSlice to fulfill Serializer

func (*StringSlice) Set

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

Set appends the string value to the list of values

func (*StringSlice) String

func (s *StringSlice) String() string

String returns a readable representation of this value (for usage defaults)

func (*StringSlice) Value

func (s *StringSlice) Value() []string

Value returns the slice of strings set by this flag

type StringSliceFlag

type StringSliceFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	TakesFile   bool
	Value       *StringSlice
	DefaultText string
	HasBeenSet  bool
	Destination *StringSlice
}

StringSliceFlag is a flag with type *StringSlice

func (*StringSliceFlag) Apply

func (f *StringSliceFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*StringSliceFlag) GetUsage

func (f *StringSliceFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*StringSliceFlag) GetValue

func (f *StringSliceFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*StringSliceFlag) IsRequired

func (f *StringSliceFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*StringSliceFlag) IsSet

func (f *StringSliceFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*StringSliceFlag) Names

func (f *StringSliceFlag) Names() []string

Names returns the names of the flag

func (*StringSliceFlag) String

func (f *StringSliceFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*StringSliceFlag) TakesValue

func (f *StringSliceFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type Timestamp

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

Timestamp wrap to satisfy golang's flag interface.

func NewTimestamp

func NewTimestamp(timestamp time.Time) *Timestamp

Timestamp constructor

func (*Timestamp) Get

func (t *Timestamp) Get() interface{}

Get returns the flag structure

func (*Timestamp) Set

func (t *Timestamp) Set(value string) error

Parses the string value to timestamp

func (*Timestamp) SetLayout

func (t *Timestamp) SetLayout(layout string)

Set the timestamp string layout for future parsing

func (*Timestamp) SetTimestamp

func (t *Timestamp) SetTimestamp(value time.Time)

Set the timestamp value directly

func (*Timestamp) String

func (t *Timestamp) String() string

String returns a readable representation of this value (for usage defaults)

func (*Timestamp) Value

func (t *Timestamp) Value() *time.Time

Value returns the timestamp value stored in the flag

type TimestampFlag

type TimestampFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Layout      string
	Value       *Timestamp
	DefaultText string
	HasBeenSet  bool
}

TimestampFlag is a flag with type time

func (*TimestampFlag) Apply

func (f *TimestampFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*TimestampFlag) GetUsage

func (f *TimestampFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*TimestampFlag) GetValue

func (f *TimestampFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*TimestampFlag) IsRequired

func (f *TimestampFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*TimestampFlag) IsSet

func (f *TimestampFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*TimestampFlag) Names

func (f *TimestampFlag) Names() []string

Names returns the names of the flag

func (*TimestampFlag) String

func (f *TimestampFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*TimestampFlag) TakesValue

func (f *TimestampFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type Uint64Flag

type Uint64Flag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       uint64
	DefaultText string
	Destination *uint64
	HasBeenSet  bool
}

Uint64Flag is a flag with type uint64

func (*Uint64Flag) Apply

func (f *Uint64Flag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*Uint64Flag) GetUsage

func (f *Uint64Flag) GetUsage() string

GetUsage returns the usage string for the flag

func (*Uint64Flag) GetValue

func (f *Uint64Flag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*Uint64Flag) IsRequired

func (f *Uint64Flag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*Uint64Flag) IsSet

func (f *Uint64Flag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*Uint64Flag) Names

func (f *Uint64Flag) Names() []string

Names returns the names of the flag

func (*Uint64Flag) String

func (f *Uint64Flag) String() string

String returns a readable representation of this value (for usage defaults)

func (*Uint64Flag) TakesValue

func (f *Uint64Flag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

type UintFlag

type UintFlag struct {
	Name        string
	Aliases     []string
	Usage       string
	EnvVars     []string
	FilePath    string
	Required    bool
	Hidden      bool
	Value       uint
	DefaultText string
	Destination *uint
	HasBeenSet  bool
}

UintFlag is a flag with type uint

func (*UintFlag) Apply

func (f *UintFlag) Apply(set *flag.FlagSet) error

Apply populates the flag given the flag set and environment

func (*UintFlag) GetUsage

func (f *UintFlag) GetUsage() string

GetUsage returns the usage string for the flag

func (*UintFlag) GetValue

func (f *UintFlag) GetValue() string

GetValue returns the flags value as string representation and an empty string if the flag takes no value at all.

func (*UintFlag) IsRequired

func (f *UintFlag) IsRequired() bool

IsRequired returns whether or not the flag is required

func (*UintFlag) IsSet

func (f *UintFlag) IsSet() bool

IsSet returns whether or not the flag has been set through env or file

func (*UintFlag) Names

func (f *UintFlag) Names() []string

Names returns the names of the flag

func (*UintFlag) String

func (f *UintFlag) String() string

String returns a readable representation of this value (for usage defaults)

func (*UintFlag) TakesValue

func (f *UintFlag) TakesValue() bool

TakesValue returns true of the flag takes a value, otherwise false

Package Files

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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