feat(tree): add recent commit metadata and LFS support to file metadata

- Added RecentCommit message definition with oid, subject and timestamp fields
- Extended TreeEntry, Tree, and FileMetadata messages with is_lfs and recent_commit fields
- Updated get_file_metadata function to include recent commit information
- Added tree module import and recent_commit lookup functionality
- Updated protobuf definitions to include new metadata fields
- Enhanced file metadata response with LFS status and commit history

tree/find_files.rs

@@ -4,10 +4,12 @@ use crate::paginate;
 use crate::pb::{
     FileMetadata, FindFilesRequest, FindFilesResponse, ListTreeRequest, ObjectType, tree_entry,
 };
+use crate::tree;
 
 impl GitBare {
     pub fn find_files(&self, request: FindFilesRequest) -> GitResult<FindFilesResponse> {
         let revision = request.revision.clone();
+        let rev = tree::resolve_revision(&revision);
         let root = if request.pathspec.is_empty() {
             vec![String::new()]
         } else {
@@ -35,13 +37,17 @@ impl GitBare {
                     tree_entry::EntryType::TreeEntryTypeUnspecified => ObjectType::Unspecified,
                     _ => ObjectType::Blob,
                 } as i32;
+                let entry_path = entry.path.clone();
+                let rc = tree::recent_commit(self, &rev, &entry_path);
                 files.push(FileMetadata {
-                    path: entry.path,
+                    path: entry_path,
                     oid: entry.oid,
                     mode: entry.mode,
                     size: entry.size,
                     r#type: object_type,
                     binary: false,
+                    is_lfs: false,
+                    recent_commit: rc,
                 });
             }
         }

tree/get_file_metadata.rs

@@ -3,6 +3,7 @@ use gix::object::tree::EntryKind;
 use crate::bare::GitBare;
 use crate::error::{GitError, GitResult};
 use crate::pb::{FileMetadata, GetFileMetadataRequest, ObjectType, object_selector};
+use crate::tree;
 
 impl GitBare {
     pub fn get_file_metadata(&self, request: GetFileMetadataRequest) -> GitResult<FileMetadata> {
@@ -26,6 +27,7 @@ impl GitBare {
             EntryKind::Commit => ObjectType::Commit,
             _ => ObjectType::Blob,
         } as i32;
+        let rc = tree::recent_commit(self, &revision, &request.path);
         Ok(FileMetadata {
             path: request.path,
             oid: Some(self.oid_to_pb(hex)),
@@ -33,6 +35,8 @@ impl GitBare {
             size: 0,
             r#type: kind,
             binary: false,
+            is_lfs: false,
+            recent_commit: rc,
         })
     }
 }

tree/list_tree.rs

@@ -4,6 +4,7 @@ use crate::bare::GitBare;
 use crate::error::{GitError, GitResult};
 use crate::paginate;
 use crate::pb::{ListTreeRequest, ListTreeResponse, TreeEntry, object_selector, tree_entry};
+use crate::tree;
 
 impl GitBare {
     pub fn list_tree(&self, request: ListTreeRequest) -> GitResult<ListTreeResponse> {
@@ -40,13 +41,16 @@ impl GitBare {
             };
             let kind = entry.kind();
             let hex = entry.id().to_string();
+            let entry_path = path.clone();
             entries.push(TreeEntry {
                 name,
-                path: path.clone(),
+                path: entry_path.clone(),
                 oid: Some(self.oid_to_pb(hex)),
                 r#type: entry_type(kind) as i32,
                 mode: u32::from_str_radix(&format!("{:o}", entry.mode()), 8).unwrap_or(0),
                 size: entry_size(&repo, entry.id().to_string().as_str()).unwrap_or(0),
+                is_lfs: false,
+                recent_commit: tree::recent_commit(self, &revision, &entry_path),
             });
 
             if request.recursive && matches!(kind, EntryKind::Tree) {

tree/mod.rs

@@ -2,3 +2,49 @@ pub mod find_files;
 pub mod get_file_metadata;
 pub mod get_tree;
 pub mod list_tree;
+
+use crate::bare::GitBare;
+use crate::pb::{self, RecentCommit, object_selector};
+
+pub(crate) fn resolve_revision(sel: &Option<pb::ObjectSelector>) -> String {
+    match sel.as_ref().and_then(|s| s.selector.as_ref()) {
+        Some(object_selector::Selector::Oid(oid)) => oid.hex.clone(),
+        Some(object_selector::Selector::Revision(name)) => name.revision.clone(),
+        None => "HEAD".into(),
+    }
+}
+
+pub(crate) fn recent_commit(gb: &GitBare, revision: &str, path: &str) -> Option<RecentCommit> {
+    let output = std::process::Command::new("git")
+        .args([
+            "--git-dir",
+            &gb.bare_dir.to_string_lossy(),
+            "log",
+            "-1",
+            "--format=%H %s %at",
+            revision,
+            "--",
+            path,
+        ])
+        .output()
+        .ok()?;
+    if !output.status.success() {
+        return None;
+    }
+    let line = String::from_utf8_lossy(&output.stdout).trim().to_string();
+    if line.is_empty() {
+        return None;
+    }
+    let (hex, rest) = line.split_once(' ')?;
+    let (subject, ts_str) = rest.rsplit_once(' ')?;
+    let ts: i64 = ts_str.parse().ok()?;
+    Some(RecentCommit {
+        oid: Some(gb.oid_to_pb(hex)),
+        subject: subject.to_string(),
+        committed_timestamp: ts,
+    })
+}
+
+pub(crate) fn is_lfs_pointer(data: &[u8]) -> bool {
+    data.starts_with(b"version https://git-lfs.github.com/spec/v1")
+}