Add merge_queue_enabled option to rust-bors.toml

Author: Sakib25800

rust-bors.example.toml

@@ -2,6 +2,11 @@
 # (Required)
 timeout = 3600
 
+# Whether to enable the merge queue or not.
+# When enabled, approved PRs will be automatically merged.
+# (Optional, defaults to false)
+merge_queue_enabled = true
+
 # Labels that should be set on a PR after an event happens.
 # "+<label>" adds the label, while "-<label>" removes the label after the event.
 # Supported events:

src/bors/merge_queue.rs

@@ -23,6 +23,11 @@ pub async fn merge_queue_tick(ctx: Arc<BorsContext>) -> anyhow::Result<()> {
                 continue;
             }
         };
+
+        if !repo.config.load().merge_queue_enabled {
+            continue;
+        }
+
         let priority = repo_db.tree_state.priority();
         let prs = ctx.db.get_merge_queue_prs(repo_name, priority).await?;
 

src/config.rs

@@ -21,6 +21,8 @@ pub struct RepositoryConfig {
     pub labels: HashMap<LabelTrigger, Vec<LabelModification>>,
     #[serde(default, deserialize_with = "deserialize_duration_from_secs_opt")]
     pub min_ci_time: Option<Duration>,
+    #[serde(default)]
+    pub merge_queue_enabled: bool,
 }
 
 fn default_timeout() -> Duration {
@@ -167,6 +169,27 @@ mod tests {
         assert_eq!(config.min_ci_time, Some(Duration::from_secs(3600)));
     }
 
+    #[test]
+    fn deserialize_merge_queue_enabled_default() {
+        let content = "";
+        let config = load_config(content);
+        assert_eq!(config.merge_queue_enabled, false);
+    }
+
+    #[test]
+    fn deserialize_merge_queue_enabled_true() {
+        let content = "merge_queue_enabled = true";
+        let config = load_config(content);
+        assert_eq!(config.merge_queue_enabled, true);
+    }
+
+    #[test]
+    fn deserialize_merge_queue_enabled_false() {
+        let content = "merge_queue_enabled = false";
+        let config = load_config(content);
+        assert_eq!(config.merge_queue_enabled, false);
+    }
+
     #[test]
     fn deserialize_labels() {
         let content = r#"[labels]