libgit2 is licensed GPLv2-with-linking-exception, and this project is
deliberately GPL-free (see scripts/license-policy.json). libgit2 was only
an OPTIONAL, faster git-history code path guarded by HAVE_LIBGIT2 and
auto-detected via pkg-config; it always shipped with a popen("git log ...")
fallback that release binaries already used (they were built without
libgit2). Making that popen fallback the SOLE git-history implementation
means there is NO change to shipped behavior.
Changes:
- pass_githistory.c: collapse the HAVE_LIBGIT2 #ifdef so only the popen
parse_git_log remains; drop the now-unused <git2.h>/<time.h> includes.
- cbm.c / cbm.h / main.c / subprocess.c / index_supervisor.h: remove the
libgit2 mimalloc allocator bind and its >=1.7.0 version guards; keep the
tree-sitter + sqlite3 binds; correct the comments.
- Makefile.cbm: remove the optional-libgit2 pkg-config detection block,
the REQUIRE_LIBGIT2 error gate, and all LIBGIT2 CFLAGS/LIBS/FLAGS.
- .github/workflows/_test.yml: drop the REQUIRE_LIBGIT2 test-matrix leg
plus its libgit2-dev/pkg-config apt install (lower CI cost, no new
gating, no trigger change).
- flake.nix: drop libgit2/pkg-config from the dev shell (now-dead dep).
HAVE_LIBGIT2 no longer exists anywhere in the tree.
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
Adds flake.nix and flake.lock for Nix users.
- Inputs: NixOS/nixpkgs nixpkgs-unstable, pinned by commit + narHash for supply-chain integrity
- Targets: aarch64/x86_64 × darwin/linux
- buildPhase calls Makefile.cbm cbm directly because scripts/build.sh's `file`-based compiler detection fails on Nix (cc is a wrapper script there); Nix stdenv already guarantees the correct compiler + target arch
- Dev shell adds pkg-config + libgit2 so the optional libgit2 acceleration in pass_githistory.c is picked up via pkg-config
Opt-in: non-Nix users see no behaviour change. flake.nix and flake.lock are inert unless `nix build` or `nix develop` is invoked.
Martin Vogel