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args.go
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/
args.go
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package cli
import (
"bytes"
"github.com/alexflint/go-arg"
)
func parseCommandArgs(args []string, cmd Command) (*arg.Parser, error) {
p, err := argParser(args, cmd)
if err != nil {
return nil, err
}
if len(args) > 1 {
err = p.Parse(args[1:])
} else {
err = p.Parse([]string{})
}
if err != nil {
return nil, err
}
return p, nil
}
func argParser(args []string, cmd Command) (*arg.Parser, error) {
return arg.NewParser(arg.Config{Program: args[0]}, cmd.GetArgs())
}
// Usage returns usage information
func Usage(cmd Command) string {
var b bytes.Buffer
p, _ := argParser([]string{cmd.GetName()}, cmd)
p.WriteUsage(&b)
return b.String()
}
// Help returns extended usage information
func Help(cmd Command) string {
var b bytes.Buffer
p, _ := argParser([]string{cmd.GetName()}, cmd)
p.WriteHelp(&b)
return b.String()
}