Track local ref SHAs on pull for incremental bundle generation on remote

RNS/Utilities/rngit/client.py

@@ -433,7 +433,21 @@ class ReticulumGitClient():
             batch = fetch_queue[:ref_batch_size]
             fetch_queue = fetch_queue[ref_batch_size:]
 
-            refs_list = [{"sha": sha, "ref": ref} for sha, ref in batch]
+            refs_list = []
+            for sha, ref in batch:
+                ref_entry = {"sha": sha, "ref": ref}
+                try:
+                    # Attempt to get local ref SHA for incremental bundle generation on remote
+                    result = subprocess.run(["git", "rev-parse", ref], capture_output=True, text=True, check=False)
+                    if result.returncode == 0:
+                        local_sha = result.stdout.strip()
+                        if local_sha != sha: ref_entry["have"] = local_sha
+
+                except Exception as e:
+                    RNS.log(f"Could not resolve local SHA for {ref} during fetch enumeration, getting full history for this ref: {e}", RNS.LOG_WARNING)
+
+                refs_list.append(ref_entry)
+
             ref_names = [ref for _, ref in batch]
             RNS.log(f"Fetching batch of {len(refs_list)} refs: {ref_names}", RNS.LOG_DEBUG)
 

RNS/Utilities/rngit/server.py

@@ -520,7 +520,12 @@ class ReticulumGitNode():
                 RNS.log(f"Created {tmp_path} for {link}", RNS.LOG_DEBUG)
                 
                 bundle_path = os.path.join(tmp_path, "fetch.bundle")
-                execv = ["git", "bundle", "create", "--no-progress", bundle_path] + ref_names
+                execv = ["git", "bundle", "create", "--no-progress", bundle_path]
+
+                for r in refs:
+                    execv.append(r["ref"])
+                    if "have" in r and r["have"]: execv.append(f"^{r['have']}")
+
                 result = subprocess.run(execv, cwd=repository_path, capture_output=True, check=False)
                 if result.returncode != 0: return self.RES_REMOTE_FAIL.to_bytes(1, "big") + result.stderr