package file import ( "fmt" "os" "path/filepath" ) // The MSDN docs appear to say that a normal path that is 248 bytes long will work; // empirically the path must be less then 248 bytes long. // See https://learn.microsoft.com/en-us/windows/win32/fileio/naming-a-file#maximum-path-length-limitation const maxPathLenght = 248 // ReadStringOrFile returns the content of a string or a file if the file exists. // The returned boolean value indicates whether the specified `input` was a file path or not. func ReadStringOrFile(input string) (string, bool, error) { if len(input) >= maxPathLenght { return input, false, nil } // Check if input is a file path if _, err := os.Stat(input); err != nil && os.IsNotExist(err) { // No file found => use input as result return input, false, nil } else if err != nil { return "", false, err } result, err := os.ReadFile(input) if err != nil { return "", true, err } return string(result), true, nil } // ExpandFileList takes a list of file globs and expands them into a list // of matching file paths. It returns the expanded file list and any errors // from glob matching. This allows safely passing user input globs through to // glob matching. func ExpandFileList(fileList []string) ([]string, error) { var result []string for _, glob := range fileList { globbed, err := filepath.Glob(glob) if err != nil { return result, fmt.Errorf("failed to match %s: %w", glob, err) } if globbed != nil { result = append(result, globbed...) } } return result, nil }