mirror of
https://github.com/hasura/graphql-engine.git
synced 2024-12-15 09:22:43 +03:00
60 lines
2.4 KiB
Nix
60 lines
2.4 KiB
Nix
|
# Sets up our Rust toolchain and Crane for cross-compilation.
|
||
|
|
# This is mostly a copy of the example provided at:
|
||
|
|
# https://crane.dev/examples/cross-rust-overlay.html
|
||
|
|
{ nixpkgs
|
||
|
|
, rust-overlay
|
||
|
|
, crane
|
||
|
|
, localSystem
|
||
|
|
, crossSystem ? localSystem
|
||
|
|
}:
|
||
|
|
let
|
||
|
|
pkgs = import nixpkgs {
|
||
|
|
inherit crossSystem localSystem;
|
||
|
|
overlays = [ rust-overlay.overlays.default ];
|
||
|
|
};
|
||
|
|
|
||
|
|
lib = pkgs.pkgsBuildHost.lib;
|
||
|
|
|
||
|
|
# Converts host system string for use in environment variable names
|
||
|
|
envCase = triple: lib.strings.toUpper (builtins.replaceStrings [ "-" ] [ "_" ] triple);
|
||
|
|
|
||
|
|
# `hostPlatform` is the cross-compilation output platform;
|
||
|
|
# `buildPlatform` is the platform we are compiling on
|
||
|
|
buildPlatform = pkgs.stdenv.buildPlatform;
|
||
|
|
hostPlatform = pkgs.stdenv.hostPlatform;
|
||
|
|
|
||
|
|
# When possibly cross-compiling we get several versions of nixpkgs of the
|
||
|
|
# form, `pkgs.pkgs<where it runs><platform it produces outputs for>`. We use
|
||
|
|
# `pkgs.pkgsBuildHost` to get packages that run at build time (so run on the
|
||
|
|
# build platform), and that produce outputs for the host platform which is the
|
||
|
|
# cross-compilation target.
|
||
|
|
rustBin = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ../rust-toolchain.toml;
|
||
|
|
rustToolchain = rustBin.override { targets = [ hostPlatform.config ]; };
|
||
|
|
craneLib = (crane.mkLib pkgs).overrideToolchain rustToolchain;
|
||
|
|
|
||
|
|
buildEnv = {
|
||
|
|
CARGO_BUILD_TARGET = hostPlatform.config;
|
||
|
|
"CARGO_TARGET_${envCase hostPlatform.config}_LINKER" = "${pkgs.stdenv.cc.targetPrefix}cc";
|
||
|
|
|
||
|
|
# This environment variable may be necessary if any of your dependencies use
|
||
|
|
# a build-script which invokes the `cc` crate to build some other code. The
|
||
|
|
# `cc` crate should automatically pick up on our target-specific linker
|
||
|
|
# above, but this may be necessary if the build script needs to compile and
|
||
|
|
# run some extra code on the build system.
|
||
|
|
HOST_CC = "${pkgs.stdenv.cc.nativePrefix}cc";
|
||
|
|
};
|
||
|
|
in
|
||
|
|
{
|
||
|
|
inherit rustToolchain;
|
||
|
|
|
||
|
|
callPackage = (package: args:
|
||
|
|
# Call the package, providing `craneLib` as an extra.
|
||
|
|
let crate = pkgs.callPackage package (args // { inherit craneLib; });
|
||
|
|
in
|
||
|
|
# Override the derivation to add cross-compilation environment variables.
|
||
|
|
crate.overrideAttrs (previous: buildEnv // {
|
||
|
|
# We also have to override the `cargoArtifacts` derivation with the same changes.
|
||
|
|
cargoArtifacts = previous.cargoArtifacts.overrideAttrs (previous: buildEnv);
|
||
|
|
}));
|
||
|
|
}
|