package main

import (
	"flag"
	"os"
)

// flagSet wraps flag.FlagSet so subcommands report errors instead of exiting,
// which keeps error handling in one place in run().
type flagSet struct{ fs *flag.FlagSet }

func newStdFlagSet(name string) *flag.FlagSet {
	fs := flag.NewFlagSet(name, flag.ContinueOnError)
	fs.SetOutput(os.Stderr)
	return fs
}

func (f *flagSet) String(name, value, usage string) *string { return f.fs.String(name, value, usage) }
func (f *flagSet) Bool(name string, value bool, usage string) *bool {
	return f.fs.Bool(name, value, usage)
}
func (f *flagSet) Int(name string, value int, usage string) *int { return f.fs.Int(name, value, usage) }
func (f *flagSet) Parse(args []string) error                     { return f.fs.Parse(args) }