mustSelect = append(mustSelect, r)
				inMustSelect[r] = true
			}
		}
		gover.ModSort(mustSelect) // ensure determinism
		mustSelectFor[m] = mustSelect
	}

	workFilePath := modload.WorkFilePath() // save go.work path because EnterModule clobbers it.

	var goV string
	for _, m := range mms.Versions() {
		if mms.ModRoot(m) == "" && m.Path == "command-line-arguments" {
			// This is not a real module.

				}
				found, foundModRoot = r, modRoot
			}
		}
	}
	return found, foundModRoot, modFilePath(foundModRoot)
}

func replaceRelativeTo() string {
	if workFilePath := WorkFilePath(); workFilePath != "" {
		return filepath.Dir(workFilePath)
	}
	return MainModules.ModRoot(MainModules.mustGetSingleMainModule())
}

// canonicalizeReplacePath ensures that relative, on-disk, replaced module paths

	// Check whether modules are enabled and whether we're in a module.
	modload.ForceUseModules = true
	modload.ExplicitWriteGoMod = true
	haveExplicitArgs := len(args) > 0

	if modload.HasModRoot() || modload.WorkFilePath() != "" {
		modload.LoadModFile(ctx) // to fill MainModules

		if haveExplicitArgs {
			for _, mainModule := range modload.MainModules.Versions() {
				targetAtUpgrade := mainModule.Path + "@upgrade"

	base.AddModCommonFlags(&cmdInit.Flag)
}

func runInit(ctx context.Context, cmd *base.Command, args []string) {
	modload.InitWorkfile()

	modload.ForceUseModules = true

	gowork := modload.WorkFilePath()
	if gowork == "" {
		gowork = filepath.Join(base.Cwd(), "go.work")
	}

	if _, err := fsys.Stat(gowork); err == nil {
		base.Fatalf("go: %s already exists", gowork)
	}

	base.AddChdirFlag(&cmdVendor.Flag)
	base.AddModCommonFlags(&cmdVendor.Flag)
}

func runVendor(ctx context.Context, cmd *base.Command, args []string) {
	modload.InitWorkfile()
	if modload.WorkFilePath() == "" {
		base.Fatalf("go: no go.work file found\n\t(run 'go work init' first or specify path using GOWORK environment variable)")
	}

	modcmd.RunVendor(ctx, vendorE, vendorO, args)

			base.Fatalf("go: invalid GOWORK: not an absolute path")
		}
		return gowork
	}
}

// WorkFilePath returns the absolute path of the go.work file, or "" if not in
// workspace mode. WorkFilePath must be called after InitWorkfile.
func WorkFilePath() string {
	return workFilePath
}

// Reset clears all the initialized, cached state about the use of modules,
// so that we can start over.

	base.AddModCommonFlags(&cmdUse.Flag)
}

func runUse(ctx context.Context, cmd *base.Command, args []string) {
	modload.ForceUseModules = true
	modload.InitWorkfile()
	gowork := modload.WorkFilePath()
	if gowork == "" {
		base.Fatalf("go: no go.work file found\n\t(run 'go work init' first or specify path using GOWORK environment variable)")
	}
	wf, err := modload.ReadWorkFile(gowork)
	if err != nil {

	base.AddChdirFlag(&cmdVendor.Flag)
	base.AddModCommonFlags(&cmdVendor.Flag)
}

func runVendor(ctx context.Context, cmd *base.Command, args []string) {
	modload.InitWorkfile()
	if modload.WorkFilePath() != "" {
		base.Fatalf("go: 'go mod vendor' cannot be run in workspace mode. Run 'go work vendor' to vendor the workspace or set 'GOWORK=off' to exit workspace mode.")
	}
	RunVendor(ctx, vendorE, vendorO, args)
}

		base.Fatalf("go: 'go help work edit' accepts at most one argument")
	}
	var gowork string
	if len(args) == 1 {
		gowork = args[0]
	} else {
		modload.InitWorkfile()
		gowork = modload.WorkFilePath()
	}
	if gowork == "" {
		base.Fatalf("go: no go.work file found\n\t(run 'go work init' first or specify path using GOWORK environment variable)")
	}

	if *editGo != "" && *editGo != "none" {

	gomod := ""
	modload.Init()
	if modload.HasModRoot() {
		gomod = modload.ModFilePath()
	} else if modload.Enabled() {
		gomod = os.DevNull
	}
	modload.InitWorkfile()
	gowork := modload.WorkFilePath()
	// As a special case, if a user set off explicitly, report that in GOWORK.
	if cfg.Getenv("GOWORK") == "off" {
		gowork = "off"
	}
	return []cfg.EnvVar{
		{Name: "GOMOD", Value: gomod},