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

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Add support for building cargo'ed Rust programs
2014-10-10 15:59:37 +01:00
{ stdenv, cacert, git, rustc, cargo, rustRegistry }:
buildRustPackage: Fix Cargo.lock being ignored It turns out that `cargo`, with respect to registry dependencies, was ignoring the package versions locked in `Cargo.lock` because we changed the registry index URL. Therefore, every time `rustRegistry` would be updated, we'd always try to use the latest version available for every dependency and as a result the deps' SHA256 hashes would almost always have to be changed. To fix this, now we do a string substitution in `Cargo.lock` of the `crates.io` registry URL with our URL. This should be safe because our registry is just a copy of the `crates.io` registry at a certain point in time. Since now we don't always use the latest version of every dependency, the build of `cargo` actually started to fail because two of the dependencies specified in its `Cargo.lock` file have build failures. To fix the latter problem, I've added a `cargoUpdateHook` variable that gets ran both when fetching dependencies and just before building the program. The purpose of `cargoUpdateHook` is to do any ad-hoc updating of dependencies necessary to get the package to build. The use of the '--precise' flag is needed so that cargo doesn't try to fetch an even newer version whenever `rustRegistry` is updated (and therefore have to change depsSha256 as a consequence).
2015-04-23 01:43:11 +01:00
{ name ? "cargo-deps", src, sha256, cargoUpdateHook ? "" }:
Add support for building cargo'ed Rust programs
2014-10-10 15:59:37 +01:00
stdenv.mkDerivation {
name = "${name}-fetch";
buildInputs = [ rustc cargo git ];
builder = ./fetch-builder.sh;
fetcher = ./fetch-cargo-deps;
buildRustPackage: Fix Cargo.lock being ignored It turns out that `cargo`, with respect to registry dependencies, was ignoring the package versions locked in `Cargo.lock` because we changed the registry index URL. Therefore, every time `rustRegistry` would be updated, we'd always try to use the latest version available for every dependency and as a result the deps' SHA256 hashes would almost always have to be changed. To fix this, now we do a string substitution in `Cargo.lock` of the `crates.io` registry URL with our URL. This should be safe because our registry is just a copy of the `crates.io` registry at a certain point in time. Since now we don't always use the latest version of every dependency, the build of `cargo` actually started to fail because two of the dependencies specified in its `Cargo.lock` file have build failures. To fix the latter problem, I've added a `cargoUpdateHook` variable that gets ran both when fetching dependencies and just before building the program. The purpose of `cargoUpdateHook` is to do any ad-hoc updating of dependencies necessary to get the package to build. The use of the '--precise' flag is needed so that cargo doesn't try to fetch an even newer version whenever `rustRegistry` is updated (and therefore have to change depsSha256 as a consequence).
2015-04-23 01:43:11 +01:00
inherit src rustRegistry cargoUpdateHook;
Add support for building cargo'ed Rust programs
2014-10-10 15:59:37 +01:00
outputHashAlgo = "sha256";
outputHashMode = "recursive";
outputHash = sha256;
SSL_CERT_FILE = "${cacert}/etc/ca-bundle.crt";
impureEnvVars = [ "http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy" ];
preferLocalBuild = true;
}
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