move git_repo fixture to its own file for consistency

pkgs/clan-cli/tests/git_repo.py

@@ -0,0 +1,20 @@
+import subprocess
+from pathlib import Path
+
+import pytest
+from clan_cli.nix import nix_shell
+
+
+# fixture for git_repo
+@pytest.fixture
+def git_repo(temp_dir: Path) -> Path:
+    # initialize a git repository
+    cmd = nix_shell(["nixpkgs#git"], ["git", "init"])
+    subprocess.run(cmd, cwd=temp_dir, check=True)
+    # set user.name and user.email
+    cmd = nix_shell(["nixpkgs#git"], ["git", "config", "user.name", "test"])
+    subprocess.run(cmd, cwd=temp_dir, check=True)
+    cmd = nix_shell(["nixpkgs#git"], ["git", "config", "user.email", "test@test.test"])
+    subprocess.run(cmd, cwd=temp_dir, check=True)
+    # return the path to the git repository
+    return temp_dir