Adding upstream version 2.21.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/commands/run_test.py

@@ -536,6 +536,13 @@ def test_merge_conflict(cap_out, store, in_merge_conflict):
     assert b'Unmerged files.  Resolve before committing.' in printed
 
 
+def test_files_during_merge_conflict(cap_out, store, in_merge_conflict):
+    opts = run_opts(files=['placeholder'])
+    ret, printed = _do_run(cap_out, store, in_merge_conflict, opts)
+    assert ret == 0
+    assert b'Bash hook' in printed
+
+
 def test_merge_conflict_modified(cap_out, store, in_merge_conflict):
     # Touch another file so we have unstaged non-conflicting things
     assert os.path.exists('placeholder')
@@ -635,6 +642,32 @@ def test_skip_bypasses_installation(cap_out, store, repo_with_passing_hook):
     assert ret == 0
 
 
+def test_skip_alias_bypasses_installation(
+        cap_out, store, repo_with_passing_hook,
+):
+    config = {
+        'repo': 'local',
+        'hooks': [
+            {
+                'id': 'skipme',
+                'name': 'skipme-1',
+                'alias': 'skipme-1',
+                'entry': 'skipme',
+                'language': 'python',
+                'additional_dependencies': ['/pre-commit-does-not-exist'],
+            },
+        ],
+    }
+    add_config_to_repo(repo_with_passing_hook, config)
+
+    ret, printed = _do_run(
+        cap_out, store, repo_with_passing_hook,
+        run_opts(all_files=True),
+        {'SKIP': 'skipme-1'},
+    )
+    assert ret == 0
+
+
 def test_hook_id_not_in_non_verbose_output(
         cap_out, store, repo_with_passing_hook,
 ):
@@ -685,7 +718,7 @@ def test_non_ascii_hook_id(repo_with_passing_hook, tempdir_factory):
     with cwd(repo_with_passing_hook):
         _, stdout, _ = cmd_output_mocked_pre_commit_home(
             sys.executable, '-m', 'pre_commit.main', 'run', '☃',
-            retcode=None, tempdir_factory=tempdir_factory,
+            check=False, tempdir_factory=tempdir_factory,
         )
         assert 'UnicodeDecodeError' not in stdout
         # Doesn't actually happen, but a reasonable assertion
@@ -704,7 +737,7 @@ def test_stdout_write_bug_py26(repo_with_failing_hook, store, tempdir_factory):
         _, out = git_commit(
             fn=cmd_output_mocked_pre_commit_home,
             tempdir_factory=tempdir_factory,
-            retcode=None,
+            check=False,
         )
         assert 'UnicodeEncodeError' not in out
         # Doesn't actually happen, but a reasonable assertion