chore: Typing map for str -> repo class

Author: tony

libvcs/shortcuts.py

@@ -1,9 +1,20 @@
 """Shortcuts"""
-from typing import Union
+from typing import Dict, Literal, Type, Union
 
 from libvcs import GitRepo, MercurialRepo, SubversionRepo
 from libvcs.exc import InvalidPipURL, InvalidVCS
 
+#: Default VCS systems by string (in :data:`DEFAULT_VCS_CLASS_MAP`)
+DEFAULT_VCS_LITERAL = Literal["git", "hg", "svn"]
+#: Union of VCS Classes
+DEFAULT_VCS_CLASS_UNION = Type[Union[GitRepo, MercurialRepo, SubversionRepo]]
+#: String -> Class Map. ``DEFAULT_VCS_CLASS_MAP['git']`` -> :class:`~libvcs.git.GitRepo`
+DEFAULT_VCS_CLASS_MAP: Dict[DEFAULT_VCS_LITERAL, DEFAULT_VCS_CLASS_UNION] = {
+    "git": GitRepo,
+    "svn": SubversionRepo,
+    "hg": MercurialRepo,
+}
+
 
 def create_repo(
     url, vcs, progress_callback=None, **kwargs