Crate quarb_git 

Git repository adapter for the Quarb query engine.

A repository is an arbor with a real DAG for its crosslink fabric. The root exposes four names:

• /branches/<name>, /tags/<name> — the refs. A ref node is an alias for its commit: same properties, same children.
• /HEAD — the checked-out commit, same alias treatment.
• /commits/<hash> — every commit. Navigating by literal name accepts anything git rev-parse does (unique prefixes, HEAD~2, v1.0^{}), without enumerating; enumeration (/commits/*) lists every commit reachable from any ref, in reverse chronological order, batched through one rev-list --all.

A commit’s properties are its header (::author, ::email, ::date as an instant (the author date, offset preserved), ::committer, ::subject, ::message, ::parent — the first parent’s hash); its children are its tree — descend /branches/master/src/lib.rs and the blob’s content is the node’s value (::), giving time-travel file access at any commit. Tree entries carry ;;;type, ;;;mode, ;;;size, and ;;;hash.

References are inherent, no schema needed: ::parent~> resolves to the first parent, ->parent enumerates all parents (merges fan out), and <-parent finds the commits that point here (children — served from the enumeration, so it loads the commit list). Traits name what a node is: <commit>, <branch>, <tag>, <tree>, <blob>.

Everything is read through git plumbing over subprocess (rev-list, rev-parse, ls-tree, cat-file, …) — no libgit2, no new dependencies — lazily, one object on first touch, cached for the adapter’s lifetime. The adapter never writes.

Structs

GitAdapter

A git repository, exposed as an arbor.

Enums

GitError

An error opening or reading a repository.