package cli import ( "errors" "flag" "strings" "github.com/micro/cli/v2" ) func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) { switch ff.Value.(type) { case *cli.StringSlice: default: set.Set(name, ff.Value.String()) } } func normalizeFlags(flags []cli.Flag, set *flag.FlagSet) error { visited := make(map[string]bool) set.Visit(func(f *flag.Flag) { visited[f.Name] = true }) for _, f := range flags { parts := f.Names() if len(parts) == 1 { continue } var ff *flag.Flag for _, name := range parts { name = strings.Trim(name, " ") if visited[name] { if ff != nil { return errors.New("Cannot use two forms of the same flag: " + name + " " + ff.Name) } ff = set.Lookup(name) } } if ff == nil { continue } for _, name := range parts { name = strings.Trim(name, " ") if !visited[name] { copyFlag(name, ff, set) } } } return nil }