Fix duplicated message

Author: linyinfeng

src/update.rs

@@ -146,6 +146,15 @@ async fn update_chat_repo_pr(
     pr: u64,
     settings: &PullRequestSettings,
 ) -> Result<(), CommandError> {
+    let _guard = resources.commit_lock(pr.to_string()).await;
+    // check again commit existence after acquiring the lock
+    {
+        let settings = resources.settings.read().await;
+        if !settings.pull_requests.contains_key(&pr) {
+            return Ok(())
+        }
+    }
+
     let result = chat::pr_check(resources, repo_resources, pr).await?;
     log::info!("finished pr check ({chat}, {repo}, {pr})");
     if let Some(commit) = result {
@@ -166,6 +175,15 @@ async fn update_chat_repo_commit(
     commit: &str,
     settings: &CommitSettings,
 ) -> Result<(), CommandError> {
+    let _guard = resources.commit_lock(commit.to_string()).await;
+    // check again commit existence after acquiring the lock
+    {
+        let settings = resources.settings.read().await;
+        if !settings.commits.contains_key(commit) {
+            return Ok(())
+        }
+    }
+
     let result = chat::commit_check(resources, repo_resources, commit).await?;
     log::info!("finished commit check ({chat}, {repo}, {commit})");
     if !result.new.is_empty() {