eflag

eflag

-- import "github.com/cmcoffee/go-snuglib/eflag"

Package 'eflag' is a wrapper around Go's standard flag, it provides enhancments for: Adding Header's and Footer's to Usage. Adding Aliases to flags. (ie.. -d, --debug) Enhances formatting for flag usage. Aside from that everything else is standard from the flag library.

Usage

var (
	CLIArgs       = cmd.CLIArgs
	SyntaxName    = cmd.SyntaxName
	SetOutput     = cmd.SetOutput
	PrintDefaults = cmd.PrintDefaults
	Shorten       = cmd.Shorten
	String        = cmd.String
	StringVar     = cmd.StringVar
	Arg           = cmd.Arg
	Args          = cmd.Args
	Bool          = cmd.Bool
	BoolVar       = cmd.BoolVar
	Duration      = cmd.Duration
	DurationVar   = cmd.DurationVar
	Float64       = cmd.Float64
	Float64Var    = cmd.Float64Var
	Int           = cmd.Int
	IntVar        = cmd.IntVar
	Int64         = cmd.Int64
	Int64Var      = cmd.Int64Var
	Lookup        = cmd.Lookup
	Multi         = cmd.Multi
	MultiVar      = cmd.MultiVar
	NArg          = cmd.NArg
	NFlag         = cmd.NFlag
	Name          = cmd.Name
	Output        = cmd.Output
	Parsed        = cmd.Parsed
	Uint          = cmd.Uint
	UintVar       = cmd.UintVar
	Uint64        = cmd.Uint64
	Uint64Var     = cmd.Uint64Var
	Var           = cmd.Var
	Visit         = cmd.Visit
	VisitAll      = cmd.VisitAll
)

var ErrHelp = flag.ErrHelp

func Footer

func Footer(input string)

Sets the footer for usage info.

func Header

func Header(input string)

Sets the header for usage info.

func Parse

func Parse() (err error)

Parse flags

func Usage

func Usage()

Shows usage.

type EFlagSet

type EFlagSet struct {
	Header     string // Header presented at start of help.
	Footer     string // Footer presented at end of help.
	AdaptArgs  bool   // Reorders flags and arguments so flags come first, non-flag arguments second, unescapes arguments with '\' escape character.
	ShowSyntax bool   // Display Usage: line, CLIArgs will automatically display usage info.

	*flag.FlagSet
}

A EFlagSet is a set of defined flags.

func NewFlagSet

func NewFlagSet(name string, errorHandling ErrorHandling) (output *EFlagSet)

Load a flag created with flag package.

func (*EFlagSet) Args

func (s *EFlagSet) Args() []string

Returns extra arguments.

func (*EFlagSet) Bool

func (E *EFlagSet) Bool(name string, usage string) *bool

Bool defines a bool flag with specified name, default and usage string. The return value is the address of a bool variable that stores the value of the flag.

func (*EFlagSet) BoolVar

func (E *EFlagSet) BoolVar(p *bool, name string, usage string)

BoolVar defines a bool flag with specified name, and usage string. The argument p points to a bool variable in which to store the value of the flag.

func (*EFlagSet) CLIArgs

func (E *EFlagSet) CLIArgs(name ...string)

Maps CLI Args not set to flags, to flags in order of addition.

func (*EFlagSet) IsSet

func (s *EFlagSet) IsSet(name string) bool

func (*EFlagSet) Multi

func (E *EFlagSet) Multi(name string, value string, usage string) *[]string

Array variable, ie.. comma-separated values --flag="test","test2"

func (*EFlagSet) MultiVar

func (E *EFlagSet) MultiVar(p *[]string, name string, value string, usage string)

Array variable, ie.. comma-separated values --flag="test","test2"

func (*EFlagSet) Order

func (s *EFlagSet) Order(name ...string)

Specifies the order in which flags are displayed.

func (*EFlagSet) Parse

func (s *EFlagSet) Parse(args []string) (err error)

Wraps around the standard flag Parse, adds header and footer.

func (*EFlagSet) PrintDefaults

func (s *EFlagSet) PrintDefaults()

Reads through all flags available and outputs with better formatting.

func (*EFlagSet) ResolveAlias

func (s *EFlagSet) ResolveAlias(name string) string

Resolves Alias name to fullname

func (*EFlagSet) SetOutput

func (s *EFlagSet) SetOutput(output io.Writer)

Change where output will be directed.

func (*EFlagSet) Shorten

func (s *EFlagSet) Shorten(name string, ch rune)

Adds a single charachter alias to the command, ie.. --help h

func (*EFlagSet) SyntaxName

func (E *EFlagSet) SyntaxName(name string)

Specifies the name that will be shown for the usage/syntax.

func (*EFlagSet) VisitAll

func (s *EFlagSet) VisitAll(fn func(*Flag))

Provide same order.

type ErrorHandling

type ErrorHandling int

Duplicate flag's ErrorHandling.

const (
	ContinueOnError ErrorHandling = iota
	ExitOnError
	PanicOnError
	ReturnErrorOnly
)

type Flag

type Flag = flag.Flag