fix(vcs): git checkout after clone must contains -- .

copier/_vcs.py

@@ -212,7 +212,9 @@ def clone(url: str, ref: str | None = None) -> str:
                 )
 
     with local.cwd(location):
-        git("checkout", "-f", ref or "HEAD")
+        ## The `git checkout -f <ref>` command doesn't works when repo is local, dirty and core.fsmonitor is enabled
+        ## ref: https://github.com/copier-org/copier/issues/1887
+        git("-c", "core.fsmonitor=false", "checkout", "-f", ref or "HEAD")
         git("submodule", "update", "--checkout", "--init", "--recursive", "--force")
 
     return location

tests/test_vcs.py

@@ -7,14 +7,15 @@
 import pytest
 from packaging.version import Version
 from plumbum import local
+from pytest_gitconfig.plugin import GitConfig
 
 from copier import run_copy, run_update
 from copier._main import Worker
 from copier._user_data import load_answersfile_data
 from copier._vcs import checkout_latest_tag, clone, get_git_version, get_repo
-from copier.errors import ShallowCloneWarning
+from copier.errors import DirtyLocalWarning, ShallowCloneWarning
 
-from .helpers import git
+from .helpers import build_file_tree, git, git_save
 
 
 def test_get_repo() -> None:
@@ -88,6 +89,33 @@ def test_local_clone() -> None:
     shutil.rmtree(local_tmp, ignore_errors=True)
 
 
+def test_local_dirty_clone(
+    tmp_path_factory: pytest.TempPathFactory, gitconfig: GitConfig
+) -> None:
+    """
+    When core.fsmonitor is enabled, normal `git checkout` command won't works.
+    """
+
+    gitconfig.set({"core.fsmonitor": "true"})
+    src = tmp_path_factory.mktemp("src")
+    print(src)
+
+    build_file_tree({src / "version.txt": "0.1.0"})
+    git_save(src)
+
+    build_file_tree({src / "version.txt": "0.2.0", src / "README.md": "hello world"})
+
+    with pytest.warns(DirtyLocalWarning):
+        local_tmp = clone(str(src))
+
+    assert local_tmp
+    assert Path(local_tmp, "version.txt").exists()
+    assert Path(local_tmp, "version.txt").read_text() == "0.2.0"
+    assert Path(local_tmp, "README.md").exists()
+    assert Path(local_tmp, "README.md").read_text() == "hello world"
+    shutil.rmtree(local_tmp, ignore_errors=True)
+
+
 @pytest.mark.impure
 def test_shallow_clone(tmp_path: Path, recwarn: pytest.WarningsRecorder) -> None:
     # This test should always work but should be much slower if `is_git_shallow_repo()` is not