fix(action): improve download logic with deprecated branch fallback for googlesource URLs

Co-authored-by: Copilot <copilot@github.com>

.github/actions/download-kernel/action.yml

@@ -89,27 +89,51 @@ runs:
           print(f"Syncing: {name} -> {path}")
           print(f"  Download URL: {url}")
           try:
-            aria_cmd = f"aria2c -x16 -s16 -k1M -j5 --file-allocation=none -o {name}.tar.gz '{url}'"
-            subprocess.run(aria_cmd, shell=True, check=True)
+            def try_download(url, name):
+                aria_cmd = f"aria2c -x16 -s16 -k1M -j5 --file-allocation=none -o {name}.tar.gz '{url}'"
+                print(f"  Trying download: {url}")
+                result = subprocess.run(aria_cmd, shell=True)
+                return result.returncode == 0
+
+            downloaded = False
+            # Only apply deprecated fallback for googlesource URLs
+            if "googlesource.com" in url:
+                # Try main branch first
+                downloaded = try_download(url, name)
+                if not downloaded:
+                    # Try deprecated branch
+                    if "+archive/" in url:
+                        parts = url.split("+archive/")
+                        branch = parts[1].split(".tar.gz")[0]
+                        dep_url = f"{parts[0]}+archive/deprecated/{branch}.tar.gz"
+                        print(f"  Main branch failed, trying deprecated branch: {dep_url}")
+                        downloaded = try_download(dep_url, name)
+            else:
+                downloaded = try_download(url, name)
+
+            if not downloaded:
+                print(f"Failed to download {name} from all attempted URLs.")
+                return False
+
             tar_cmd = f"tar -I 'pigz -p {NPROC} -b 256' -x --record-size=1M -C {path} {strip} -f {name}.tar.gz"
             subprocess.run(tar_cmd, shell=True, check=True)
             os.remove(f"{name}.tar.gz")
             # Handle linkfiles and copyfiles
             top_dir = os.getcwd()
             for src_rel, dest_rel in linkfiles:
-              src_path = os.path.join(top_dir, path, src_rel)
-              dest_path = os.path.join(top_dir, dest_rel)
-              os.makedirs(os.path.dirname(dest_path), exist_ok=True)
-              if os.path.lexists(dest_path): os.remove(dest_path)
-              rel_target = os.path.relpath(src_path, os.path.dirname(dest_path))
-              os.symlink(rel_target, dest_path)
-              print(f"  [Link] {dest_rel} -> {src_rel}")
+                src_path = os.path.join(top_dir, path, src_rel)
+                dest_path = os.path.join(top_dir, dest_rel)
+                os.makedirs(os.path.dirname(dest_path), exist_ok=True)
+                if os.path.lexists(dest_path): os.remove(dest_path)
+                rel_target = os.path.relpath(src_path, os.path.dirname(dest_path))
+                os.symlink(rel_target, dest_path)
+                print(f"  [Link] {dest_rel} -> {src_rel}")
             for src_rel, dest_rel in copyfiles:
-              src_path = os.path.join(top_dir, path, src_rel)
-              dest_path = os.path.join(top_dir, dest_rel)
-              os.makedirs(os.path.dirname(dest_path), exist_ok=True)
-              shutil.copy2(src_path, dest_path)
-              print(f"  [Copy] {dest_rel} from {src_rel}")
+                src_path = os.path.join(top_dir, path, src_rel)
+                dest_path = os.path.join(top_dir, dest_rel)
+                os.makedirs(os.path.dirname(dest_path), exist_ok=True)
+                shutil.copy2(src_path, dest_path)
+                print(f"  [Copy] {dest_rel} from {src_rel}")
             print(f"Synced {name} successfully!")
             return True
           except Exception as e: