cmdmain

package
v0.0.0-...-2d5464a Latest Latest
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Published: Jan 17, 2015 License: Apache-2.0 Imports: 10 Imported by: 0

Documentation

Overview

Package cmdmain contains the shared implementation for camget, camput, camtool, and other Camlistore command-line tools.

Index

Constants

This section is empty.

Variables

View Source
var (
	FlagVersion = flag.Bool("version", false, "show version")
	FlagHelp    = flag.Bool("help", false, "print usage")
	FlagVerbose = flag.Bool("verbose", false, "extra debug logging")
)
View Source
var (
	// ExtraFlagRegistration allows to add more flags from
	// other packages (with AddFlags) when Main starts.
	ExtraFlagRegistration = func() {}
	// PreExit runs after the subcommand, but before Main terminates
	// with either success or the error from the subcommand.
	PreExit = func() {}
	// ExitWithFailure determines whether the command exits
	// with a non-zero exit status.
	ExitWithFailure bool
	// CheckCwd checks the current working directory, and possibly
	// changes it, or aborts the run if needed.
	CheckCwd = func() {}
)
View Source
var (

	// Indirections for replacement by tests
	Stderr io.Writer = os.Stderr
	Stdout io.Writer = os.Stdout
	Stdin  io.Reader = os.Stdin

	Exit = realExit
)
View Source
var ErrUsage = UsageError("invalid command")

Functions

func Errorf

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

Errorf prints to Stderr

func Main

func Main()

Main is meant to be the core of a command that has subcommands (modes), such as camput or camtool.

func RegisterCommand

func RegisterCommand(mode string, makeCmd func(Flags *flag.FlagSet) CommandRunner)

RegisterCommand adds a mode to the list of modes for the main command. It is meant to be called in init() for each subcommand.

Types

type CommandRunner

type CommandRunner interface {
	Usage()
	RunCommand(args []string) error
}

CommandRunner is the type that a command mode should implement.

type UsageError

type UsageError string

func (UsageError) Error

func (ue UsageError) Error() string

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