fix release workflow

.github/workflows/ci.yml

@@ -134,7 +134,9 @@ jobs:
     needs: [checks]
     if: startsWith(github.ref, 'refs/tags/')
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
 
       - name: Setup Python
         uses: actions/setup-python@v5

scripts/release_notes.py

@@ -5,7 +5,7 @@
 """
 
 import os
-from typing import List
+from typing import List, Optional
 
 import packaging.version
 
@@ -52,7 +52,7 @@ def get_commit_history() -> str:
     # Out of `all_tags`, find the latest previous version so that we can collect all
     # commits between that version and the new version we're about to publish.
     # Note that we ignore pre-releases unless the new version is also a pre-release.
-    last_tag: str
+    last_tag: Optional[str] = None
     for tag in all_tags:
         if not tag.strip():  # could be blank line
             continue
@@ -62,7 +62,10 @@ def get_commit_history() -> str:
         if version < new_version:
             last_tag = tag
             break
-    commits = os.popen(f"git log {last_tag}..{TAG}^ --oneline --first-parent").read()
+    if last_tag is not None:
+        commits = os.popen(f"git log {last_tag}..{TAG} --oneline --first-parent").read()
+    else:
+        commits = os.popen("git log --oneline --first-parent").read()
     return "## Commits\n\n" + commits