[update-checkout] add a check for locked repositories

utils/update_checkout/tests/scheme_mock.py

@@ -145,10 +145,11 @@ def setup_mock_remote(base_dir, base_config):
 
 BASEDIR_ENV_VAR = 'UPDATECHECKOUT_TEST_WORKSPACE_DIR'
 CURRENT_FILE_DIR = os.path.dirname(os.path.abspath(__file__))
+UPDATE_CHECKOUT_EXECUTABLE = 'update-checkout.cmd' if os.name == 'nt' else 'update-checkout'
 UPDATE_CHECKOUT_PATH = os.path.abspath(os.path.join(CURRENT_FILE_DIR,
                                                     os.path.pardir,
                                                     os.path.pardir,
-                                                    'update-checkout'))
+                                                    UPDATE_CHECKOUT_EXECUTABLE))
 
 
 class SchemeMockTestCase(unittest.TestCase):

utils/update_checkout/tests/test_locked_repository.py

@@ -0,0 +1,89 @@
+import unittest
+from unittest.mock import patch
+
+from update_checkout.update_checkout import _is_any_repository_locked
+
+class TestIsAnyRepositoryLocked(unittest.TestCase):
+    @patch("os.path.exists")
+    @patch("os.path.isdir")
+    @patch("os.listdir")
+    def test_repository_with_lock_file(self, mock_listdir, mock_isdir, mock_exists):
+        pool_args = [
+            ("/fake_path", None, "repo1"),
+            ("/fake_path", None, "repo2"),
+        ]
+
+        def listdir_side_effect(path):
+            if "repo1" in path:
+                return ["index.lock", "config"]
+            elif "repo2" in path:
+                return ["HEAD", "config"]
+            return []
+
+        mock_exists.return_value = True
+        mock_isdir.return_value = True
+        mock_listdir.side_effect = listdir_side_effect
+
+        result = _is_any_repository_locked(pool_args)
+        self.assertEqual(result, {"repo1"})
+
+    @patch("os.path.exists")
+    @patch("os.path.isdir")
+    @patch("os.listdir")
+    def test_repository_without_git_dir(self, mock_listdir, mock_isdir, mock_exists):
+        pool_args = [
+            ("/fake_path", None, "repo1"),
+        ]
+
+        mock_exists.return_value = False
+        mock_isdir.return_value = False
+        mock_listdir.return_value = []
+
+        result = _is_any_repository_locked(pool_args)
+        self.assertEqual(result, set())
+
+    @patch("os.path.exists")
+    @patch("os.path.isdir")
+    @patch("os.listdir")
+    def test_repository_with_git_file(self, mock_listdir, mock_isdir, mock_exists):
+        pool_args = [
+            ("/fake_path", None, "repo1"),
+        ]
+
+        mock_exists.return_value = True
+        mock_isdir.return_value = False
+        mock_listdir.return_value = []
+
+        result = _is_any_repository_locked(pool_args)
+        self.assertEqual(result, set())
+
+    @patch("os.path.exists")
+    @patch("os.path.isdir")
+    @patch("os.listdir")
+    def test_repository_with_multiple_lock_files(self, mock_listdir, mock_isdir, mock_exists):
+        pool_args = [
+            ("/fake_path", None, "repo1"),
+        ]
+
+        mock_exists.return_value = True
+        mock_isdir.return_value = True
+        mock_listdir.return_value = ["index.lock", "merge.lock", "HEAD"]
+
+        result = _is_any_repository_locked(pool_args)
+        self.assertEqual(result, {"repo1"})
+
+    @patch("os.path.exists")
+    @patch("os.path.isdir")
+    @patch("os.listdir")
+    def test_repository_with_no_lock_files(self, mock_listdir, mock_isdir, mock_exists):
+        pool_args = [
+            ("/fake_path", None, "repo1"),
+        ]
+
+        mock_exists.return_value = True
+        mock_isdir.return_value = True
+        mock_listdir.return_value = ["HEAD", "config", "logs"]
+
+        result = _is_any_repository_locked(pool_args)
+        self.assertEqual(result, set())
+

utils/update_checkout/update_checkout/update_checkout.py

@@ -16,6 +16,7 @@ import re
 import sys
 import traceback
 from multiprocessing import Lock, Pool, cpu_count, freeze_support
+from typing import Set, List, Any
 
 from build_swift.build_swift.constants import SWIFT_SOURCE_ROOT
 
@@ -67,8 +68,11 @@ def check_parallel_results(results, op):
         if r is not None:
             if fail_count == 0:
                 print("======%s FAILURES======" % op)
-            print("%s failed (ret=%d): %s" % (r.repo_path, r.ret, r))
             fail_count += 1
+            if isinstance(r, str):
+                print(r)
+                continue
+            print("%s failed (ret=%d): %s" % (r.repo_path, r.ret, r))
             if r.stderr:
                 print(r.stderr)
     return fail_count
@@ -329,6 +333,30 @@ def get_scheme_map(config, scheme_name):
 
     return None
 
+def _is_any_repository_locked(pool_args: List[Any]) -> Set[str]:
+    """Returns the set of locked repositories.
+
+    A repository is considered to be locked if its .git directory contains a
+    file ending in ".lock".
+
+    Args:
+        pool_args (List[Any]): List of arguments passed to the
+        `update_single_repository` function.
+
+    Returns:
+        Set[str]: The names of the locked repositories if any.
+    """
+
+    repos = [(x[0], x[2]) for x in pool_args]
+    locked_repositories = set()
+    for source_root, repo_name in repos:
+        dot_git_path = os.path.join(source_root, repo_name, ".git")
+        if not os.path.exists(dot_git_path) or not os.path.isdir(dot_git_path):
+            continue
+        for file in os.listdir(dot_git_path):
+            if file.endswith(".lock"):
+                locked_repositories.add(repo_name)
+    return locked_repositories
 
 def update_all_repositories(args, config, scheme_name, scheme_map, cross_repos_pr):
     pool_args = []
@@ -363,6 +391,12 @@ def update_all_repositories(args, config, scheme_name, scheme_map, cross_repos_p
                    cross_repos_pr]
         pool_args.append(my_args)
 
+    locked_repositories: set[str] = _is_any_repository_locked(pool_args)
+    if len(locked_repositories) > 0:
+        return [
+            f"'{repo_name}' is locked by git. Cannot update it."
+            for repo_name in locked_repositories
+        ]
     return run_parallel(update_single_repository, pool_args, args.n_processes)