feat(ci)!: enhance changelog generation with context augmentation

scripts/augment_context.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+import json
+import subprocess
+import sys
+
+def git_commits_between(parent, merge):
+    """Return list of commit hashes between parent and merge (exclusive of parent, inclusive of merge)."""
+    out = subprocess.check_output(
+        ["git", "rev-list", f"{parent}..{merge}", "--no-merges"],
+        text=True
+    )
+    return [line.strip() for line in out.splitlines() if line.strip()]
+
+def load_context(path=None):
+    if path:
+        with open(path) as f:
+            return json.load(f)
+    else:
+        return json.load(sys.stdin)
+
+def main(path=None):
+    context = load_context(path)
+    commits = context[0]["commits"]
+    commits_by_id = {c["id"]: c for c in commits}
+
+    new_commits = []
+    consumed = set()
+
+    for c in commits:
+        if c.get("merge_commit"):
+            parents = subprocess.check_output(
+                ["git", "rev-list", "--parents", "-n", "1", c["id"]],
+                text=True
+            ).strip().split()
+            merge_id, *parent_ids = parents
+
+            if len(parent_ids) >= 2:
+                mainline = parent_ids[0]
+                children_ids = git_commits_between(mainline, merge_id)
+
+                children = []
+                for cid in children_ids:
+                    if cid in commits_by_id:
+                        children.append(commits_by_id[cid])
+                        consumed.add(cid)
+
+                if not c.get("extra") or not isinstance(c["extra"], dict):
+                    c["extra"] = {}
+                c["extra"]["children"] = children
+
+        new_commits.append(c)
+
+    filtered = [c for c in new_commits if c["id"] not in consumed]
+    context[0]["commits"] = filtered
+
+    json.dump(context, sys.stdout, indent=4)
+
+if __name__ == "__main__":
+    main(sys.argv[1] if len(sys.argv) > 1 else None)