Function expandPatterns

cmd/errtrace/main.go:254–280

expandPatterns turns the given list of patterns and files into a list of paths to files. Arguments that are already files are returned as-is. Arguments that are patterns are expanded using 'go list'. As a special case for stdin, "-" is returned as-is.

(args []string)

// Arguments that are patterns are expanded using 'go list'.
// As a special case for stdin, "-" is returned as-is.
func expandPatterns(args []string) ([]string, error) {
	var files, patterns []string
	for _, arg := range args {
		if arg == "-" {
			files = append(files, arg)
			continue
		}

		if info, err := os.Stat(arg); err == nil && !info.IsDir() {
			files = append(files, arg)
			continue
		}

		patterns = append(patterns, arg)
	}

	if len(patterns) > 0 {
		pkgFiles, err := goListFiles(patterns)
		if err != nil {
			return nil, errtrace.Wrap(fmt.Errorf("go list: %w", err))
		}

		files = append(files, pkgFiles...)
	}

	return files, nil
}

var _execCommand = exec.Command