// The usage message is never printed, but it's used in chdir_test.go
	// to identify that the -C flag is from AddChdirFlag.
	flags.Func("C", "AddChdirFlag", ChdirFlag)
}

// AddModFlag adds the -mod build flag to the flag set.
func AddModFlag(flags *flag.FlagSet) {
	flags.Var(explicitStringFlag{value: &cfg.BuildMod, explicit: &cfg.BuildModExplicit}, "mod", "")
}

	"cmd/go/internal/cfg"
	"cmd/go/internal/load"
	"cmd/go/internal/modload"
	"cmd/internal/sys"
)

func init() {
	base.AddBuildFlagsNX(&CmdFmt.Flag)
	base.AddChdirFlag(&CmdFmt.Flag)
	base.AddModFlag(&CmdFmt.Flag)
	base.AddModCommonFlags(&CmdFmt.Flag)
}

var CmdFmt = &base.Command{
	Run:       runFmt,
	UsageLine: "go fmt [-n] [-x] [packages]",
	Short:     "gofmt (reformat) package sources",
	Long: `

	cmd.Flag.StringVar(&cfg.BuildBuildmode, "buildmode", "default", "")
	cmd.Flag.Var(&load.BuildGcflags, "gcflags", "")
	cmd.Flag.Var(&load.BuildGccgoflags, "gccgoflags", "")
	if mask&OmitModFlag == 0 {
		base.AddModFlag(&cmd.Flag)
	}
	if mask&OmitModCommonFlags == 0 {
		base.AddModCommonFlags(&cmd.Flag)
	} else {
		// Add the overlay flag even when we don't add the rest of the mod common flags.