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lilpacks/lilgit

d.githooks/
dbuild/
dcli/
dlilgit/
dtests/
-.gitignore
-.stylua.toml
-LICENSE
-README.md
-lilgit.lua
-lilpack.json

lilgit

A read-only HTTP(S) frontend for git, built on Lilush runtime.

Features:

Everything is served straight from the git object database, i.e. from bare repositories on disk.

Pushes to served repositories appear immediately — the git core's mtime caches invalidate themselves.

No support for git push over HTTP, push over ssh to the bare repo instead.

URL scheme

PathBehavior
/repo index
/{repo}redirect to the default-branch tree
/{repo}/tree/{ref}/{path}/directory listing, README rendered below
/{repo}/blob/{ref}/{path}markdown/djot as HTML; source as text; images/binaries raw
/{repo}/raw/{ref}/{path}raw bytes, extension-guessed MIME
/{repo}/refsbranches and tags
/{repo}/log/{ref}commit log (first-parent, paged via ?after=<sha>)
/{repo}/commit/{sha}commit view: metadata, message, changed files

Every route of a repository listed in auth.private answers 401 until credentials are presented; see "Private repositories" below.

Configuration

Read from LILGIT_CONFIG_FILE (default /etc/lilgit/config.json); a missing file means pure defaults. CLI flags (--ip, --port, --dir, --title) override everything.

{
    "ip": "127.0.0.1",
    "port": 8091,
    "site_title": "my code",
    "repos_dir": "/srv/git",
    "repos": [
        {
            "name": "lilush",
            "path": "/srv/git/lilush.git",
            "description": "Linux Shell & Lua Framework",
            "default_branch": "master"
        }
    ],
    "ssl": { "default": { "cert": "...", "key": "..." } }
}

Repositories are discovered in repos_dir at startup (dirs with HEAD or .git/HEAD).

A top-level directory that is not itself a repository is treated as a category and scanned one level deep: /srv/git/repo.git serves as repo, /srv/git/tools/lilgit.git serves as tools/lilgit, so repositories with the same basename can live in different categories.

A repository directory is never scanned for nested repositories, and discovery never goes deeper than one category level. Explicit repos entries (plain or category-qualified names) win on name collision.

The ssl table enables built-in TLS (SNI-capable); omit it when running behind a reverse proxy.

Private repositories

Repositories named in auth.private are served only to visitors holding HTTP Basic credentials from auth.users — browsing pages, raw blobs and the smart-HTTP clone endpoints alike — and are left out of the repo index until the visitor authenticates.

Any valid user unlocks any private repo; there is no per-repo access list. An empty private list (the default) means auth is off and every discovered repository is public.

{
    "auth": {
        "realm": "lilgit",
        "users": { "alice": "hunter2", "bob": "s3cret" },
        "private": ["work/secret", "scratch"]
    }
}

Names in private are registry names, exactly as they appear in the index and in URLs (repo or category/repo). A name matching no repository is logged as a warning at startup, not an error.

Caveats worth knowing before relying on this:

  • Passwords are stored in the clear, so the config file belongs to root at mode 0600.

  • Basic credentials travel in the clear as well: serve over TLS (the ssl table) or behind a TLS-terminating proxy.

  • A private repository answers 401, not 404, so its existence remains inferable from its URL. Only its contents, description and index entry are hidden.

  • There is no rate limiting or lockout on failed attempts.

  • Responses for private repositories are marked private rather than public in Cache-Control, so shared caches will not store them.

Tests

Run from the pack root:

lilush tests/run.lua
LILGIT_E2E=1 lilush tests/run.lua

The e2e spec forks a real server and drives it with the git and curl binaries.

Roadmap

Performance sweep:

  • Header-only object reads (read_object_header) in the lilush git core, so show_sizes listings stop inflating every blob.

  • Pack building on git clone, profiled against the lilush repo (~9.5k objects, 21 MB generated pack, ~3.5 s clone wall time, of which ~1 s is collect_objects and ~2 s is build_pack):

    • Every object is read and fully inflated twice — once during collection, once during serialization (2N read_object calls, ~116 MB inflated for the 21 MB pack). Memoizing contents between the two passes, or header-only reads for blobs during collection (collection parses only commits, trees and tags), halves the read cost.

    • zlib.compress accounts for roughly a third of the build (58 MB in, 21 MB out); the trailing sha1 over the pack is negligible.

    • Undeltified output makes the pack about 3.4x larger than git's own for the same repo (20.7 MB vs 6.1 MB), which inflates both compression and transfer cost. Delta reuse from existing packs is the larger, deferred fix.

Deferred features:

  • SIGHUP rescan of repos_dir (today: restart to pick up new repos).

  • Source blob view with line numbers and optional client-side syntax highlighting.

  • Content diffs in the commit view (needs a line-diff implementation; today it lists changed files only, against the first parent).

  • Full-history log across all parents (today: first-parent walk).

  • Search across repos.

  • Tarball snapshots (needs a tar writer).