nixpkgs/pkgs/build-support/rust/fetchcargo.nix

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{ stdenv, cacert, git, rust, cargo-vendor, python3 }:
let cargo-vendor-normalise = stdenv.mkDerivation {
name = "cargo-vendor-normalise";
src = ./cargo-vendor-normalise.py;
unpackPhase = ":";
installPhase = "install -D $src $out/bin/cargo-vendor-normalise";
buildInputs = [ (python3.withPackages(ps: [ ps.toml ])) ];
preferLocalBuild = true;
};
in
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{ name ? "cargo-deps", src, srcs, patches, sourceRoot, sha256, cargoUpdateHook ? "" }:
stdenv.mkDerivation {
name = "${name}-vendor";
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nativeBuildInputs = [ cacert cargo-vendor git cargo-vendor-normalise rust.cargo ];
inherit src srcs patches sourceRoot;
phases = "unpackPhase patchPhase installPhase";
installPhase = ''
if [[ ! -f Cargo.lock ]]; then
echo
echo "ERROR: The Cargo.lock file doesn't exist"
echo
echo "Cargo.lock is needed to make sure that cargoSha256 doesn't change"
echo "when the registry is updated."
echo
exit 1
fi
export CARGO_HOME=$(mktemp -d cargo-home.XXX)
${cargoUpdateHook}
mkdir -p $out
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cargo vendor $out | cargo-vendor-normalise > config
# fetchcargo used to never keep the config output by cargo vendor
# and instead hardcode the config in ./fetchcargo-default-config.toml.
# This broke on packages needing git dependencies, so now we keep the config.
# But not to break old cargoSha256, if the previous behavior was enough,
# we don't store the config.
if ! cmp config ${./fetchcargo-default-config.toml} > /dev/null; then
install -Dt $out/.cargo config;
fi;
'';
outputHashAlgo = "sha256";
outputHashMode = "recursive";
outputHash = sha256;
impureEnvVars = stdenv.lib.fetchers.proxyImpureEnvVars;
preferLocalBuild = true;
}