.

crates/workspace/src/views/repo_detail/mod.rs

@@ -14,6 +14,7 @@ use gpui_component::menu::PopupMenuItem;
 use gpui_component::tree::TreeState;
 use gpui_component::{ActiveTheme, IconName, StyledExt, h_flex, v_flex};
 use signed_core::Announcement;
+use signed_git::FileCommit;
 use signed_state::{GitStore, RepoStore};
 
 mod browser;
@@ -43,6 +44,10 @@ pub struct RepoDetailView {
     files: HashMap<String, FileContent>,
     /// Reads in flight, to avoid duplicate loads.
     loading_files: HashSet<String>,
+    /// Latest commit touching a previewed file (or the README), keyed by path.
+    commits: HashMap<String, FileCommit>,
+    /// Commit queries in flight, to avoid duplicate loads.
+    loading_commits: HashSet<String>,
     /// A clone/fetch is in flight.
     loading: bool,
     error: Option<SharedString>,
@@ -71,6 +76,8 @@ impl RepoDetailView {
             selected_file: None,
             files: HashMap::new(),
             loading_files: HashSet::new(),
+            commits: HashMap::new(),
+            loading_commits: HashSet::new(),
             loading: true,
             error: None,
             focus_handle: cx.focus_handle(),
@@ -113,6 +120,7 @@ impl RepoDetailView {
                         });
                         if let Some((path, bytes)) = readme_path.zip(readme) {
                             this.readme_name = Some(path.to_string_lossy().into());
+                            this.load_commit(&path.to_string_lossy(), cx);
                             if let Ok(text) = String::from_utf8(bytes) {
                                 this.set_markdown(None, &text, cx);
                             }
@@ -165,6 +173,7 @@ impl RepoDetailView {
 
         self.loading_files.insert(path.to_string());
         let path = path.to_string();
+        self.load_commit(&path, cx);
 
         let task = cx.spawn(async move |this, cx| {
             let path_for_read = path.clone();
@@ -222,6 +231,41 @@ impl RepoDetailView {
 
         self.tasks.push(task);
     }
+
+    /// Query the latest commit touching `path` on a background task and cache
+    /// it in [`Self::commits`], for the file header in the content column.
+    fn load_commit(&mut self, path: &str, cx: &mut Context<Self>) {
+        if self.commits.contains_key(path) || self.loading_commits.contains(path) {
+            return;
+        }
+        let Some(worktree) = self.worktree.clone() else {
+            return;
+        };
+
+        self.loading_commits.insert(path.to_string());
+        let path = path.to_string();
+
+        let task = cx.spawn(async move |this, cx| {
+            let path_for_query = path.clone();
+            let result = cx
+                .background_spawn(async move {
+                    signed_git::worktree_last_commit(&worktree, Path::new(&path_for_query))
+                })
+                .await;
+
+            this.update(cx, |this, cx| {
+                this.loading_commits.remove(&path);
+                if let Ok(Some(commit)) = result {
+                    this.commits.insert(path, commit);
+                }
+                cx.notify();
+            })?;
+
+            Ok(())
+        });
+
+        self.tasks.push(task);
+    }
 }
 
 impl Panel for RepoDetailView {