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Draft: libgit2 and tarball unpacking performance improvements #16427

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d690cbf
libfetchers: Disable GIT_OPT_ENABLE_STRICT_HASH_VERIFICATION
xokdvium Sep 4, 2026
21dafd1
libfetchers: Patch libgit2 to use zlib-ng
xokdvium Sep 4, 2026
52bff94
libfetchers: Don't try to find deltas when unpacking to the tarball c…
xokdvium Sep 4, 2026
36bdf2a
libfetchers: fix libgit2 pack window/bigfilethreshold config
xokdvium Sep 5, 2026
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30 changes: 17 additions & 13 deletions packaging/dependencies.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -101,20 +101,24 @@ scope: {
];
});

libgit2 =
if lib.versionAtLeast pkgs.libgit2.version "1.9.4" then
pkgs.libgit2
else
# Grab newer libgit2.
pkgs.libgit2.overrideAttrs rec {
version = "1.9.4";
src = pkgs.fetchFromGitHub {
owner = "libgit2";
repo = "libgit2";
tag = "v${version}";
hash = "sha256-ZKUiz3pdFE2SKxh53X2oyr7hs32Njj5YVA0OXDXz7h0=";
};
libgit2 = pkgs.libgit2.overrideAttrs (
finalAttrs: prevAttrs: {
version = "2.0.0-rc.1";
src = pkgs.fetchFromGitHub {
owner = "libgit2";
repo = "libgit2";
rev = "ae45d0d168f7e8dbfdb8c623589cb51caac96ab3";
hash = "sha256-3sbqHm37SOwBeFgtjI2DLN6kx1F7G2N1m6rRIkqDXNI=";
};
patches = prevAttrs.patches or [ ] ++ [
./patches/0001-zlib-ng-support.patch
./patches/0002-memory-config.patch
./patches/0003-packbuilder-correct-config.patch
];
cmakeFlags = prevAttrs.cmakeFlags ++ [ "-DUSE_COMPRESSION=zlib-ng" ];
buildInputs = prevAttrs.buildInputs ++ [ pkgs.zlib-ng ];
}
);

# TODO Hack until https://github.com/NixOS/nixpkgs/issues/45462 is fixed.
boost =
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