CheckAndGetParentDir ...

Exists return weather file existed.

FileStat return a FileInfo describing the named file.

GetCurrentDirectory ...

GetCurrentPackage ...

IsDirectory ...

IsFileChanged reports whether src and dest config files are equal.

ListFiles returns all file names in `dir`.

Lock ...

MakeDirectory ...

MkdirIfNecessary ...

RecursiveDirsLookup ...

RecursiveFilesLookup ...

fileInfo describes a configuration file and is returned by fileStat.