DefaultIfEmpty returns default string of src string is empty.

GetEnvOrDefault returns default string if env key empty, as returned by os.GetEnv.

ReadFileIfExists returns contents of file at specified path as a byte array, while letting you provide specific NotExist error handling Returns []byte, true, nil if file exists, is normal, and can be read Returns nil, false, nil if err == fs.ErrNotExist Returns nil, false, err if err && err != fs.ErrNotExist .

StatIfExists lets you provide specific NotExist error handling Returns stat, true, nil if file exists Returns nil, false, nil if err == fs.ErrNotExist Returns nil, false, err if err && err != fs.ErrNotExist .

TryMakeRelative tries to generate a path for targetPath that is relative to basePath.