Public API additions (src/tree):
- src/tree/types.rs: new TreeEntryWithLatest { entry, latest } pair
(entry: TreeEntry, latest: CommitInfo) with Serialize/Deserialize
derives so it can flow through the cache payload path.
- src/tree/helper.rs: parse_ls_tree_entries — NUL/newline-delimited
ls-tree stdout -> Vec<TreeEntry>. Mirrors the git ls-tree -r -t
layout (mode SP type SP oid TAB name). Errors are reported with the
1-based line index via BabyError::CommitParse for parity with
parse_commit_output.
- src/tree/usecase.rs: GitBaby::tree_entries_with_latest(revision, path)
-> Vec<TreeEntryWithLatest>. Implementation:
1) spawn a single `git ls-tree -r -t <rev> -- <path>` to enumerate
blobs/trees,
2) parse with parse_ls_tree_entries,
3) fan out N parallel `tree_latest_commit(rev, path)` lookups via
tokio::task::JoinSet,
4) reassemble preserving the ls-tree order.
Subtree paths are normalized: tree entries get a trailing `/` for
the lookup so callers don't have to know whether a name is a tree.
Path safety reuses share::validate_local_no_escape, and revision
reuses share::validate_revision_non_empty.
- src/tree/mod.rs: re-export TreeEntryWithLatest alongside the
existing tree public surface.
Trait bound change (src/repo.rs):
- RepositoryFacade now requires Send + Sync in addition to 'static.
This is needed so the JoinSet-driven fan-out above can share the
Arc<dyn RepositoryFacade> across spawned tasks. Existing single-task
implementations are unaffected; the only callers that needed to
add Sync explicitly are those keeping non-Sync state inside their
facade (none in-tree).
Tests (tests/tree.rs, new):
- tree_entries_with_latest_whole_tree: enumerate a flat repo and
verify every (path, latest_commit_id) pair round-trips against the
revwalk.
- tree_entries_with_latest_subtree: scope to a sub-path and check
only entries under it are returned, in ls-tree order.
- tree_entries_with_latest_rejects_bad_input: empty revision and
path-traversal attempts both surface BabyError without spawning a
child process.
- Uses the existing TestFacade skeleton, temp_repo helper, and
git_commit / index_commit / write_file fixtures. Counter uses
AtomicU32 + COUNTER.fetch_add for unique temp dirs across tests,
matching the pattern from other integration tests.
CI: cargo build + cargo test (64 passed, +3 new) green.
Notes:
- TreeEntryWithLatest has #[serde(default)] on no fields today, but
it follows the additive-only convention documented in AGENTS.md
(cached serde payloads only ever add new fields).
- BREAKING for RepositoryFacade implementors that are not Sync.
None ship in-tree; downstream consumers must add Sync if they hold
non-Sync interior state.
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