Module git_scanner 

Git repository scanner using gitoxide (gix).

Provides commit walking, tree traversal, and blob reading for the scan pipeline.

Performance

• Pure Rust: gix avoids FFI overhead and is faster than libgit2.
• Subtree caching: SubtreeCache makes tree walks O(changed_dirs) instead of O(all_dirs) across consecutive commits.
• Lazy iteration: Ancestor walks use iterators to stay memory-friendly.

Structs

SubtreeCache

Cache for subtree walk results. Persists across commits so unchanged directory subtrees (same tree OID) are never re-traversed.

Functions

get_commits_in_order

Returns the list of valid commits in order.

get_commits_since

Returns commits from HEAD to a known commit (exclusive).

get_tree_for_commit

Returns the tree ObjectId for a given commit hash.

walk_tree_entries_cached

Walks a Git tree with subtree-level caching.