1 files changed, 26 insertions, 2 deletions
diff --git a/publish.py b/publish.py
index e83b4d6..8a5cbee 100755
--- a/publish.py
+++ b/publish.py
@@ -14,10 +14,34 @@ def run(*argv: str) -> None:
     subprocess.run(argv, cwd=ROOT, check=True)
 
 
+def output(*argv: str) -> str:
+    return subprocess.check_output(argv, cwd=ROOT, text=True).strip()
+
+
+def require_clean_worktree() -> None:
+    status = output("git", "status", "--porcelain")
+    if status:
+        print("[publish] dirty worktree; commit or stash before publishing", file=sys.stderr)
+        print(status, file=sys.stderr)
+        raise SystemExit(1)
+
+
+def sync_tracking_ref(remote: str) -> None:
+    head = output("git", "ls-remote", remote, "refs/heads/main").split()[0]
+    local = output("git", "rev-parse", "HEAD")
+    if head != local:
+        raise SystemExit(f"[publish] {remote}/main is {head}, expected {local}")
+    run("git", "update-ref", f"refs/remotes/{remote}/main", head)
+
+
 def main() -> None:
+    require_clean_worktree()
     run("./check.py", "install")
-    run("git", "push", "swarm", "main")
-    run("git", "push", "github", "main")
+    require_clean_worktree()
+    run("git", "push", "--follow-tags", "swarm", "main")
+    sync_tracking_ref("swarm")
+    run("git", "push", "--follow-tags", "github", "main")
+    sync_tracking_ref("github")
 
 
 if __name__ == "__main__":