nixpkgs/pkgs/build-support/rust/fetchcargo.nix
Jörg Thalheim 952f4fda86
makeRustPlatform: refactor to make it easier to understand
It is now clearer what is supposed to be in the rust attribute set
without having studied type theory. The amount of code is identically.
2018-11-21 12:44:58 +00:00

63 lines
2.0 KiB
Nix

{ stdenv, cacert, git, cargo, cargo-vendor, python3 }:
let cargo-vendor-normalise = stdenv.mkDerivation {
name = "cargo-vendor-normalise";
src = ./cargo-vendor-normalise.py;
nativeBuildInputs = [ python3.pkgs.wrapPython ];
unpackPhase = ":";
installPhase = "install -D $src $out/bin/cargo-vendor-normalise";
pythonPath = [ python3.pkgs.toml ];
postFixup = "wrapPythonPrograms";
doInstallCheck = true;
installCheckPhase = ''
# check that ./fetchcargo-default-config.toml is a fix point
reference=${./fetchcargo-default-config.toml}
< $reference $out/bin/cargo-vendor-normalise > test;
cmp test $reference
'';
preferLocalBuild = true;
};
in
{ name ? "cargo-deps", src, srcs, patches, sourceRoot, sha256, cargoUpdateHook ? "" }:
stdenv.mkDerivation {
name = "${name}-vendor";
nativeBuildInputs = [ cacert cargo-vendor git cargo-vendor-normalise 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
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;
}