https://github.com/git/git/blob/master/Documentation/gitrepository-layout.txt.

NewObjectStorage creates a new ObjectStorage with the given .git directory and cache.

NewObjectStorageWithOptions creates a new ObjectStorage with the given .git directory, cache and extra options.

NewPackfileIter returns a new EncodedObjectIter for the provided packfile and object type.

NewStorage returns a new Storage backed by a given `fs.Filesystem` and cache.

NewStorageWithOptions returns a new Storage with extra options, backed by a given `fs.Filesystem` and cache.

Options holds configuration for the storage.

ShallowStorage where the shallow commits are stored, an internal to manipulate the shallow file.

Storage is an implementation of git.Storer that stores data on disk in the standard git format (this is, the .git directory).