thermostat/nix/fetchcargo.nix

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2019-03-19 06:09:54 +08:00
{ stdenv, cacert, git, cargo, cargo-vendor }:
{ name, src, sha256 }:
let
# `src` restricted to the two files that define dependencies
cargoOnlySrc = stdenv.mkDerivation {
name = "${name}-cargo";
inherit src;
phases = "installPhase";
installPhase = ''
mkdir $out
cp ${src}/Cargo.{toml,lock} $out/
'';
};
in
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stdenv.mkDerivation {
name = "${name}-vendor";
nativeBuildInputs = [ cacert git cargo cargo-vendor ];
src = cargoOnlySrc;
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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)
cargo vendor
cp -ar vendor $out
'';
outputHashAlgo = "sha256";
outputHashMode = "recursive";
outputHash = sha256;
impureEnvVars = stdenv.lib.fetchers.proxyImpureEnvVars;
preferLocalBuild = true;
}