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

blob/get_blob.rs

@@ -2,11 +2,13 @@ use gix::object::tree::EntryKind;
 
 use crate::bare::GitBare;
 use crate::error::{GitError, GitResult};
-use crate::pb::{Blob, GetBlobRequest, object_selector};
+use crate::pb::{Blob, GetBlobRequest};
+use crate::tree;
 
 impl GitBare {
     pub fn get_blob(&self, request: GetBlobRequest) -> GitResult<Blob> {
         let repo = self.gix_repo()?;
+        let revision = tree::resolve_revision(&request.revision);
         let (blob, mode, path) = if let Some(oid) = request.oid.as_ref() {
             let id = gix::hash::ObjectId::from_hex(oid.hex.as_bytes())
                 .map_err(|e| GitError::InvalidOid(e.to_string()))?;
@@ -18,11 +20,6 @@ impl GitBare {
                 request.path,
             )
         } else {
-            let revision = match request.revision.and_then(|s| s.selector) {
-                Some(object_selector::Selector::Oid(oid)) => oid.hex,
-                Some(object_selector::Selector::Revision(name)) => name.revision,
-                None => "HEAD".into(),
-            };
             let tree = repo
                 .rev_parse_single(format!("{}^{{tree}}", revision).as_str())?
                 .object()?
@@ -56,6 +53,8 @@ impl GitBare {
             data.truncate(request.max_bytes as usize);
         }
         let hex = blob.id.to_string();
+        let lfs = tree::is_lfs_pointer(&data);
+        let rc = tree::recent_commit(self, &revision, &path);
         Ok(Blob {
             oid: Some(self.oid_to_pb(hex)),
             path,
@@ -65,6 +64,8 @@ impl GitBare {
             encoding: String::new(),
             truncated,
             data,
+            is_lfs: lfs,
+            recent_commit: rc,
         })
     }
 }