OpenGit creates Git based diff tool for repository on given path (root path or some inner path in repository) in given revisionRange.

ErrFileNotFound is returned when requesting file from revision tree which is not part of tree.

ErrRepoNotFound indicates that there was no Git repository on given path.

Uncommited is default range and identifies only not yet commited (staged + untracked).

Git represents diff tool based on changes in Git repository.

Range represents revision range used to look up for the changes.