func getFileListCommon()

in oss/lib/util.go [562:639]
66 lines of code
19 McCabe index (conditional complexity)

func getFileListCommon(dpath string, chFiles chan<- fileInfoType, onlyCurrentDir bool, disableAllSymlink bool,
	enableSymlinkDir bool, filters []filterOptionType) error {
	defer close(chFiles)
	if onlyCurrentDir {
		return getCurrentDirFileListCommon(dpath, chFiles, filters)
	}

	name := dpath
	symlinkDiretorys := []string{dpath}
	walkFunc := func(fpath string, f os.FileInfo, err error) error {
		if f == nil {
			return err
		}

		dpath = filepath.Clean(dpath)
		fpath = filepath.Clean(fpath)

		fileName, err := filepath.Rel(dpath, fpath)
		if err != nil {
			return fmt.Errorf("list file error: %s, info: %s", fpath, err.Error())
		}

		if f.IsDir() {
			if fpath != dpath {
				if strings.HasSuffix(fileName, "\\") || strings.HasSuffix(fileName, "/") {
					chFiles <- fileInfoType{fileName, name}
				} else {
					chFiles <- fileInfoType{fileName + string(os.PathSeparator), name}
				}
			}
			return nil
		}

		if disableAllSymlink && (f.Mode()&os.ModeSymlink) != 0 {
			return nil
		}

		if enableSymlinkDir && (f.Mode()&os.ModeSymlink) != 0 {
			// there is difference between os.Stat and os.Lstat in filepath.Walk
			realInfo, err := os.Stat(fpath)
			if err != nil {
				return err
			}

			if realInfo.IsDir() {
				// it's symlink dir
				// if linkDir has suffix os.PathSeparator,os.Lstat determine it is a dir
				if !strings.HasSuffix(name, string(os.PathSeparator)) {
					name += string(os.PathSeparator)
				}
				linkDir := name + fileName + string(os.PathSeparator)
				symlinkDiretorys = append(symlinkDiretorys, linkDir)
				return nil
			}
		}

		if doesSingleFileMatchPatterns(fileName, filters) {
			chFiles <- fileInfoType{fileName, name}
		}
		return nil
	}

	var err error
	for {
		symlinks := symlinkDiretorys
		symlinkDiretorys = []string{}
		for _, v := range symlinks {
			err = filepath.Walk(v, walkFunc)
			if err != nil {
				return err
			}
		}
		if len(symlinkDiretorys) == 0 {
			break
		}
	}
	return err
}