Adding deletion for old tag references

perceval/backends/core/git.py

@@ -1297,7 +1297,7 @@ def _update_references(self, refs):
 
         # Delete old references
         for old_ref in self._discover_refs():
-            if not old_ref.refname.startswith('refs/heads/'):
+            if not old_ref.refname.startswith('refs/heads/') and not old_ref.refname.startswith('refs/tags/'):
                 continue
             if old_ref.refname in new_refs:
                 continue

releases/unreleased/fix-issue-#782.yml

@@ -0,0 +1,6 @@
+title: 'Fix issue #782'
+category: fixed
+author: Matt Gaughan <mgaughan@proton.me>
+issue: 782
+notes: >
+  The issue was that perceval would not delete old tags from upstream references. This change deletes tags locally if tags are deleted upstream. 

tests/test_git.py

@@ -1800,6 +1800,46 @@ def test_sync(self):
         shutil.rmtree(editable_path)
         shutil.rmtree(new_path)
 
+    def test_tag_removal_sync(self):
+        """Test sync process for tag removal"""
+        origin_path = os.path.join(self.tmp_repo_path, 'gittest')
+        editable_path = os.path.join(self.tmp_path, 'editgit')
+        new_path = os.path.join(self.tmp_path, 'newgit')
+
+        shutil.copytree(origin_path, editable_path)
+
+        repo = GitRepository.clone(editable_path, new_path)
+        repo.sync()
+
+        # Add a tag 'v.0.0-lw' to the refs and check that it exists
+        cmd = ['git', 'tag', 'v.0.0-lw']
+        subprocess.check_output(cmd, stderr=subprocess.STDOUT,
+                                cwd=editable_path, env={'LANG': 'C'})
+
+        new_commits = repo.sync()
+        self.assertEqual(len(new_commits), 0)
+
+        # Verify that the new tag 'v.0.0-lw' exists in the refs
+        refs = discover_refs(new_path)
+        self.assertIn('refs/tags/v.0.0-lw', refs)
+
+        # Delete the tag 'v.0.0-lw' and check that it has been deleted from refs
+        cmd = ['git', 'tag', '-d', 'v.0.0-lw']
+        subprocess.check_output(cmd, stderr=subprocess.STDOUT,
+                                cwd=editable_path, env={'LANG': 'C'})
+
+        new_commits = repo.sync()
+        self.assertEqual(len(new_commits), 0)
+
+        # Verify that the tag 'v.0.0-lw' is no longer in the refs
+        refs = discover_refs(new_path)
+        self.assertNotIn('refs/tags/v.0.0-lw', refs)
+        self.assertIn('refs/heads/master', refs)
+
+        # Cleanup
+        shutil.rmtree(editable_path)
+        shutil.rmtree(new_path)
+
     def test_sync_from_empty_repos(self):
         """Test sync process on empty repositories"""