View changes in a commit or in the current working directory.
a reference such as
"HEAD", or a commit id, or
NULLto the diff the working directory against the repository index.
The path to the git repository. If the directory is not a repository, parent directories are considered (see git_find). To disable this search, provide the filepath protected with
I(). When using this parameter, always explicitly call by name (i.e.
repo =) because future versions of gert may have additional parameters.