// module versions.
//
// The caller must not modify the returned summary.
func goModSummary(m module.Version) (*modFileSummary, error) {
	if m.Version == "" && !inWorkspaceMode() && MainModules.Contains(m.Path) {
		panic("internal error: goModSummary called on a main module")
	}
	if gover.IsToolchain(m.Path) {
		return rawGoModSummary(m)
	}

	if cfg.BuildMod == "vendor" {

					mods = append(mods, vendorPkgModule[path])
					dirs = append(dirs, dir)
					roots = append(roots, vendorDir)
				} else {
					subCommand := "mod"
					if inWorkspaceMode() {
						subCommand = "work"
					}