NewFileSet returns [FileSet] for the Git repository located at `root`.

pointer to a secondary reference file path containing sha-1 object ID.

A hexadecimal encoded SHA1 hash.

FileSet is Git repository aware implementation of [fileset.FileSet].

relevant documentation about git references: https://git-scm.com/book/en/v2/Git-Internals-Git-References.

Repository represents a Git repository or a directory that could later be initialized as Git repository.

View represents a view on a directory tree that takes into account all applicable .gitignore files.