flagx

Documentation

Overview

Package flagx contains a helper type for parsing CAS keys from command line arguments.

Index

• type KeyParam
  • func (kp *KeyParam) Key() cas.Key
  • func (kp *KeyParam) Set(s string) error
  • func (kp KeyParam) String() string

Examples

• KeyParam

Types

type KeyParam

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

KeyParam is a wrapper for cas.Key that is compatible with the flag.Value interface, without compromising the immutability promise of Key.

Example

package main

import (
	"flag"
	"fmt"

	"bazil.org/bazil/cas/flagx"
)

func main() {
	var kp flagx.KeyParam
	var fl flag.FlagSet

	fl.Var(&kp, "key", "blah blah")
	fl.Parse([]string{"-key=095920158295e252b3cb4728713a987875d210eca00d5b69e89e1d2e2e473153ec3de87ada31787b0d5080cdb0f7dcf15ea1f03cec5fef76df027bcc7d57b337"})
	k := kp.Key()
	fmt.Println(k)

}

Output:

095920158295e252b3cb4728713a987875d210eca00d5b69e89e1d2e2e473153ec3de87ada31787b0d5080cdb0f7dcf15ea1f03cec5fef76df027bcc7d57b337

func (*KeyParam) Key

func (kp *KeyParam) Key() cas.Key

Key returns a copy of the current value of the KeyParam.

As usual with cas.Key, the returned value is promised to be immutable.

func (*KeyParam) Set

func (kp *KeyParam) Set(s string) error

Set updates the contents of the key based on the given hex-encoded string.

See flag.Value.Set.

func (KeyParam) String

func (kp KeyParam) String() string

String returns a hex representation of the key.

See flag.Value.String and cas.Key.String.