fix archive permissions for ruby tar.gz roots

testing/make-archives

@@ -35,17 +35,20 @@ def make_archive(name: str, repo: str, ref: str, destdir: str) -> str:
     """
     output_path = os.path.join(destdir, f'{name}.tar.gz')
     with tempfile.TemporaryDirectory() as tmpdir:
+        # this ensures that the root directory has umask permissions
+        gitdir = os.path.join(tmpdir, 'root')
+
         # Clone the repository to the temporary directory
-        subprocess.check_call(('git', 'clone', repo, tmpdir))
-        subprocess.check_call(('git', '-C', tmpdir, 'checkout', ref))
+        subprocess.check_call(('git', 'clone', repo, gitdir))
+        subprocess.check_call(('git', '-C', gitdir, 'checkout', ref))
 
         # We don't want the '.git' directory
         # It adds a bunch of size to the archive and we don't use it at
         # runtime
-        shutil.rmtree(os.path.join(tmpdir, '.git'))
+        shutil.rmtree(os.path.join(gitdir, '.git'))
 
         with tarfile.open(output_path, 'w|gz') as tf:
-            tf.add(tmpdir, name)
+            tf.add(gitdir, name)
 
     return output_path
 

tests/languages/ruby_test.py

@@ -1,4 +1,5 @@
 import os.path
+import tarfile
 from unittest import mock
 
 import pytest
@@ -8,6 +9,7 @@ from pre_commit import parse_shebang
 from pre_commit.languages import ruby
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output
+from pre_commit.util import resource_bytesio
 from testing.util import xfailif_windows
 
 
@@ -72,3 +74,14 @@ def test_install_ruby_with_version(fake_gem_prefix):
     # Should be able to activate and use rbenv install
     with ruby.in_env(fake_gem_prefix, '2.7.2'):
         cmd_output('rbenv', 'install', '--help')
+
+
+@pytest.mark.parametrize(
+    'filename',
+    ('rbenv.tar.gz', 'ruby-build.tar.gz', 'ruby-download.tar.gz'),
+)
+def test_archive_root_stat(filename):
+    with resource_bytesio(filename) as f:
+        with tarfile.open(fileobj=f) as tarf:
+            root, _, _ = filename.partition('.')
+            assert oct(tarf.getmember(root).mode) == '0o755'