Major fixes and new features

venv/lib/python3.12/site-packages/mypy/git.py

@@ -0,0 +1,34 @@
+"""Git utilities."""
+
+# Used also from setup.py, so don't pull in anything additional here (like mypy or typing):
+from __future__ import annotations
+
+import os
+import subprocess
+
+
+def is_git_repo(dir: str) -> bool:
+    """Is the given directory version-controlled with git?"""
+    return os.path.exists(os.path.join(dir, ".git"))
+
+
+def have_git() -> bool:
+    """Can we run the git executable?"""
+    try:
+        subprocess.check_output(["git", "--help"])
+        return True
+    except subprocess.CalledProcessError:
+        return False
+    except OSError:
+        return False
+
+
+def git_revision(dir: str) -> bytes:
+    """Get the SHA-1 of the HEAD of a git repository."""
+    return subprocess.check_output(["git", "rev-parse", "HEAD"], cwd=dir).strip()
+
+
+def is_dirty(dir: str) -> bool:
+    """Check whether a git repository has uncommitted changes."""
+    output = subprocess.check_output(["git", "status", "-uno", "--porcelain"], cwd=dir)
+    return output.strip() != b""