func create()

in klog_file.go [93:119]

• 27 lines of code
• 6 McCabe index (conditional complexity)

func create(tag string, t time.Time, startup bool) (f *os.File, filename string, err error) {
	if logging.logFile != "" {
		f, err := openOrCreate(logging.logFile, startup)
		if err == nil {
			return f, logging.logFile, nil
		}
		return nil, "", fmt.Errorf("log: unable to create log: %v", err)
	}
	onceLogDirs.Do(createLogDirs)
	if len(logDirs) == 0 {
		return nil, "", errors.New("log: no log dirs")
	}
	name, link := logName(tag, t)
	var lastErr error
	for _, dir := range logDirs {
		fname := filepath.Join(dir, name)
		f, err := openOrCreate(fname, startup)
		if err == nil {
			symlink := filepath.Join(dir, link)
			os.Remove(symlink)        // ignore err
			os.Symlink(name, symlink) // ignore err
			return f, fname, nil
		}
		lastErr = err
	}
	return nil, "", fmt.Errorf("log: cannot create log: %v", lastErr)
}