DebugLog prints strings iff the local variable debug is set.

IgnorePath returns true if a file/directory should be ignored.

Tries to open the database, printing approproate errors if it doesn't exist, or could not be opened.

The file to be used as an object store.

The key that should always point to the current revision that the working copy is based on.

This key should point to a list of all heads in the repository.

The name of the INFO db Bucket.

The name of the bucket containing OBJECTS.