"golang.org/x/mod/modfile"
	"golang.org/x/mod/module"
)

// Variables set by other packages.
//
// TODO(#40775): See if these can be plumbed as explicit parameters.
var (
	// RootMode determines whether a module root is needed.
	RootMode Root

	// ForceUseModules may be set to force modules to be enabled when
	// GO111MODULE=auto or to report an error when GO111MODULE=off.
	ForceUseModules bool

		// This must be done before modload.Init, but we need to call work.BuildInit
		// before loading packages, since it affects package locations, e.g.,
		// for -race and -msan.
		modload.ForceUseModules = true
		modload.RootMode = modload.NoRoot
		modload.AllowMissingModuleImports()
		modload.Init()
	} else {
		modload.InitWorkfile()
	}

	work.BuildInit()
	b := work.NewBuilder("")
	defer func() {

	if pathOnly {
		base.Fatalf("cannot find %q in PATH", gotoolchain)
	}

	// Set up modules without an explicit go.mod, to download distribution.
	modload.Reset()
	modload.ForceUseModules = true
	modload.RootMode = modload.NoRoot
	modload.Init()

	// Download and unpack toolchain module into module cache.
	// Note that multiple go commands might be doing this at the same time,

}

func RunVendor(ctx context.Context, vendorE bool, vendorO string, args []string) {
	if len(args) != 0 {
		base.Fatalf("go: 'go mod vendor' accepts no arguments")
	}
	modload.ForceUseModules = true
	modload.RootMode = modload.NeedRoot

	loadOpts := modload.PackageOpts{
		Tags:                     imports.AnyTags(),
		VendorModulesInGOROOTSrc: true,
		ResolveMissingImports:    true,
		UseVendorAll:             true,

// in the current directory or parent directories.
//
// See golang.org/issue/40276 for details and rationale.
func installOutsideModule(ctx context.Context, args []string) {
	modload.ForceUseModules = true
	modload.RootMode = modload.NoRoot
	modload.AllowMissingModuleImports()
	modload.Init()
	BuildInit()

	// Load packages. Ignore non-main packages.
	// Print a warning if an argument contains "..." and matches no main packages.