}

		out = append(out, m)
	}
	return out
}

// CleanPatterns returns the patterns to use for the given command line. It
// canonicalizes the patterns but does not evaluate any matches. For patterns
// that are not local or absolute paths, it preserves text after '@' to avoid
// modifying version queries.
func CleanPatterns(patterns []string) []string {
	if len(patterns) == 0 {
		return []string{"."}
	}

// implicit @upgrade. path@none is "downgrade away".
func parseArgs(ctx context.Context, rawArgs []string) (dropToolchain bool, queries []*query) {
	defer base.ExitIfErrors()

	for _, arg := range search.CleanPatterns(rawArgs) {
		q, err := newQuery(arg)
		if err != nil {
			base.Error(err)
			continue
		}

		if q.version == "none" {
			switch q.pattern {
			case "go":

func LoadPackages(ctx context.Context, opts PackageOpts, patterns ...string) (matches []*search.Match, loadedPackages []string) {
	if opts.Tags == nil {
		opts.Tags = imports.Tags()
	}

	patterns = search.CleanPatterns(patterns)
	matches = make([]*search.Match, 0, len(patterns))
	allPatternIsRoot := false
	for _, pattern := range patterns {
		matches = append(matches, search.NewMatch(pattern))
		if pattern == "all" {