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arikawa/bot/extras/arguments/flag.go

66 lines
991 B
Go

package arguments
import (
"bytes"
"flag"
"io/ioutil"
"strings"
)
var FlagName = "command"
type FlagSet struct {
*flag.FlagSet
}
func NewFlagSet() *FlagSet {
fs := flag.NewFlagSet(FlagName, flag.ContinueOnError)
fs.SetOutput(ioutil.Discard)
return &FlagSet{fs}
}
func (fs *FlagSet) Usage() string {
var buf bytes.Buffer
fs.FlagSet.SetOutput(&buf)
fs.FlagSet.Usage()
fs.FlagSet.SetOutput(ioutil.Discard)
return buf.String()
}
type Flag struct {
arguments []string
}
func (f *Flag) ParseContent(arguments []string) error {
// trim the command out
f.arguments = arguments[1:]
return nil
}
func (f *Flag) Usage() string {
return "flags..."
}
func (f *Flag) Args() []string {
return f.arguments
}
func (f *Flag) Arg(n int) string {
if n < 0 || n >= len(f.arguments) {
return ""
}
return f.arguments[n]
}
func (f *Flag) String() string {
return strings.Join(f.arguments, " ")
}
func (f *Flag) With(fs *flag.FlagSet) error {
return fs.Parse(f.arguments)
}