Fix new commits not being added to the queue

.sqlx/query-373c31648cfc15a3a42b51dc74025ee5fb1a90da7ecaf4bf4b330076f33e74dd.json

@@ -1,12 +0,0 @@
-{
-  "db_name": "SQLite",
-  "query": "UPDATE commits SET new = false",
-  "describe": {
-    "columns": [],
-    "parameters": {
-      "Right": 0
-    },
-    "nullable": []
-  },
-  "hash": "373c31648cfc15a3a42b51dc74025ee5fb1a90da7ecaf4bf4b330076f33e74dd"
-}

.sqlx/query-3d48dcc84c3d624f7a9f9ebd0399aa9786cb94e2ddda6016fc0e8e0fee46fc98.json

@@ -0,0 +1,12 @@
+{
+  "db_name": "SQLite",
+  "query": "UPDATE commits SET new = false WHERE reachable = 2",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Right": 0
+    },
+    "nullable": []
+  },
+  "hash": "3d48dcc84c3d624f7a9f9ebd0399aa9786cb94e2ddda6016fc0e8e0fee46fc98"
+}

src/server/recurring/queue.rs

@@ -12,6 +12,7 @@ async fn inner(db: &SqlitePool) -> somehow::Result<()> {
     let new = sqlx::query!("SELECT hash FROM commits WHERE new AND reachable = 2")
         .fetch_all(&mut *conn)
         .await?;
+    debug!("Found {} new commits", new.len());
 
     // Insert them into the queue
     for row in new {
@@ -29,10 +30,22 @@ async fn inner(db: &SqlitePool) -> somehow::Result<()> {
         }
     }
 
-    // Mark all commits as old
+    // Mark all commits we just added to the queue as old. Commits from
-    sqlx::query!("UPDATE commits SET new = false")
+    // untracked branches are not marked as old because otherwise we'd miss them
+    // when they eventually end up in the tracked branches. This can for example
+    // happen when a tracked branch is fast-forwarded to a commit from an
+    // untracked branch.
+    //
+    // When tracked refs are updated, all new commits are automatically added to
+    // the queue, since they were still new and have now transitioned to
+    // reachable = 2. This should hopefully not be too big of a problem since
+    // usually the main branch is also tracked. I think I'd rather implement
+    // better queue management tools and graph UI than change this behaviour.
+    let amount = sqlx::query!("UPDATE commits SET new = false WHERE reachable = 2")
         .execute(&mut *conn)
-        .await?;
+        .await?
+        .rows_affected();
+    debug!("Marked {amount} commits as old");
 
     tx.commit().await?;
     Ok(())