Resolve issues on python pre-3.10.6 with collection dirs longer than 100 characters (#81061)

changelogs/fragments/long-collection-paths-fix.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- ansible-galaxy - Fix issue installing collections containing directories with more than 100 characters on python versions before 3.10.6

lib/ansible/galaxy/collection/__init__.py

@@ -1561,6 +1561,13 @@ def install_artifact(b_coll_targz_path, b_collection_path, b_temp_path, signatur
     """
     try:
         with tarfile.open(b_coll_targz_path, mode='r') as collection_tar:
+            # Remove this once py3.11 is our controller minimum
+            # Workaround for https://bugs.python.org/issue47231
+            # See _extract_tar_dir
+            collection_tar._ansible_normalized_cache = {
+                m.name.removesuffix(os.path.sep): m for m in collection_tar.getmembers()
+            }  # deprecated: description='TarFile member index' core_version='2.18' python_version='3.11'
+
             # Verify the signature on the MANIFEST.json before extracting anything else
             _extract_tar_file(collection_tar, MANIFEST_FILENAME, b_collection_path, b_temp_path)
 
@@ -1641,22 +1648,12 @@ def install_src(collection, b_collection_path, b_collection_output_path, artifac
 
 def _extract_tar_dir(tar, dirname, b_dest):
     """ Extracts a directory from a collection tar. """
-    member_names = [to_native(dirname, errors='surrogate_or_strict')]
-
-    # Create list of members with and without trailing separator
-    if not member_names[-1].endswith(os.path.sep):
-        member_names.append(member_names[-1] + os.path.sep)
+    dirname = to_native(dirname, errors='surrogate_or_strict').removesuffix(os.path.sep)
 
-    # Try all of the member names and stop on the first one that are able to successfully get
-    for member in member_names:
     try:
-            tar_member = tar.getmember(member)
+        tar_member = tar._ansible_normalized_cache[dirname]
     except KeyError:
-            continue
-        break
-    else:
-        # If we still can't find the member, raise a nice error.
-        raise AnsibleError("Unable to extract '%s' from collection" % to_native(member, errors='surrogate_or_strict'))
+        raise AnsibleError("Unable to extract '%s' from collection" % dirname)
 
     b_dir_path = os.path.join(b_dest, to_bytes(dirname, errors='surrogate_or_strict'))
 

test/units/cli/galaxy/test_collection_extract_tar.py

@@ -14,6 +14,7 @@ from ansible.galaxy.collection import _extract_tar_dir
 @pytest.fixture
 def fake_tar_obj(mocker):
     m_tarfile = mocker.Mock()
+    m_tarfile._ansible_normalized_cache = {'/some/dir': mocker.Mock()}
     m_tarfile.type = mocker.Mock(return_value=b'99')
     m_tarfile.SYMTYPE = mocker.Mock(return_value=b'22')
 
@@ -22,23 +23,11 @@ def fake_tar_obj(mocker):
 
 def test_extract_tar_member_trailing_sep(mocker):
     m_tarfile = mocker.Mock()
-    m_tarfile.getmember = mocker.Mock(side_effect=KeyError)
+    m_tarfile._ansible_normalized_cache = {}
 
     with pytest.raises(AnsibleError, match='Unable to extract'):
         _extract_tar_dir(m_tarfile, '/some/dir/', b'/some/dest')
 
-    assert m_tarfile.getmember.call_count == 1
-
-
-def test_extract_tar_member_no_trailing_sep(mocker):
-    m_tarfile = mocker.Mock()
-    m_tarfile.getmember = mocker.Mock(side_effect=KeyError)
-
-    with pytest.raises(AnsibleError, match='Unable to extract'):
-        _extract_tar_dir(m_tarfile, '/some/dir', b'/some/dest')
-
-    assert m_tarfile.getmember.call_count == 2
-
 
 def test_extract_tar_dir_exists(mocker, fake_tar_obj):
     mocker.patch('os.makedirs', return_value=None)