251 lines
8.4 KiB
Nix
251 lines
8.4 KiB
Nix
{
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
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flake-utils.url = "github:numtide/flake-utils";
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nix-filter.url = "github:numtide/nix-filter";
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fenix = {
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url = "github:nix-community/fenix";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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crane = {
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# TODO: Switch back to upstream after [this issue][0] is fixed
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#
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# [0]: https://github.com/ipetkov/crane/issues/497
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url = "github:CobaltCause/crane?ref=crimes-for-cross";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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attic.url = "github:zhaofengli/attic?ref=main";
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};
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outputs =
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{ self
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, nixpkgs
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, flake-utils
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, nix-filter
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, fenix
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, crane
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, ...
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}: flake-utils.lib.eachDefaultSystem (system:
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let
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rocksdb' = pkgs: pkgs.rocksdb.overrideAttrs (old:
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{
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src = pkgs.fetchFromGitHub {
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owner = "facebook";
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repo = "rocksdb";
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rev = "v8.10.0";
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hash = "sha256-KGsYDBc1fz/90YYNGwlZ0LUKXYsP1zyhP29TnRQwgjQ=";
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};
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});
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pkgsHost = nixpkgs.legacyPackages.${system};
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# Nix-accessible `Cargo.toml`
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cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
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# The Rust toolchain to use
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toolchain = fenix.packages.${system}.fromToolchainFile {
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file = ./rust-toolchain.toml;
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# See also `rust-toolchain.toml`
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sha256 = "sha256-SXRtAuO4IqNOQq+nLbrsDFbVk+3aVA8NNpSZsKlVH/8=";
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};
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builder = pkgs:
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((crane.mkLib pkgs).overrideToolchain toolchain).buildPackage;
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nativeBuildInputs = pkgs: [
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# bindgen needs the build platform's libclang. Apparently due to
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# "splicing weirdness", pkgs.rustPlatform.bindgenHook on its own doesn't
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# quite do the right thing here.
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pkgs.buildPackages.rustPlatform.bindgenHook
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];
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env = pkgs: {
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ROCKSDB_INCLUDE_DIR = "${rocksdb' pkgs}/include";
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ROCKSDB_LIB_DIR = "${rocksdb' pkgs}/lib";
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}
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// pkgs.lib.optionalAttrs pkgs.stdenv.hostPlatform.isStatic {
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ROCKSDB_STATIC = "";
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}
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// {
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CARGO_BUILD_RUSTFLAGS = let inherit (pkgs) lib stdenv; in
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lib.concatStringsSep " " ([]
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++ lib.optionals
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# This disables PIE for static builds, which isn't great in terms
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# of security. Unfortunately, my hand is forced because nixpkgs'
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# `libstdc++.a` is built without `-fPIE`, which precludes us from
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# leaving PIE enabled.
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stdenv.hostPlatform.isStatic
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["-C" "relocation-model=static"]
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++ lib.optionals
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(stdenv.buildPlatform.config != stdenv.hostPlatform.config)
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["-l" "c"]
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++ lib.optionals
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# This check has to match the one [here][0]. We only need to set
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# these flags when using a different linker. Don't ask me why,
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# though, because I don't know. All I know is it breaks otherwise.
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#
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# [0]: https://github.com/NixOS/nixpkgs/blob/612f97239e2cc474c13c9dafa0df378058c5ad8d/pkgs/build-support/rust/lib/default.nix#L36-L39
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(
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# Nixpkgs doesn't check for x86_64 here but we do, because I
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# observed a failure building statically for x86_64 without
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# including it here. Linkers are weird.
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(stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isx86_64)
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&& stdenv.hostPlatform.isStatic
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&& !stdenv.isDarwin
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&& !stdenv.cc.bintools.isLLVM
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)
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[
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"-l"
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"stdc++"
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"-L"
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"${stdenv.cc.cc.lib}/${stdenv.hostPlatform.config}/lib"
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]
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);
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}
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# What follows is stolen from [here][0]. Its purpose is to properly
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# configure compilers and linkers for various stages of the build, and
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# even covers the case of build scripts that need native code compiled and
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# run on the build platform (I think).
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#
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# [0]: https://github.com/NixOS/nixpkgs/blob/612f97239e2cc474c13c9dafa0df378058c5ad8d/pkgs/build-support/rust/lib/default.nix#L64-L78
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// (
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let
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inherit (pkgs.rust.lib) envVars;
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in
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pkgs.lib.optionalAttrs
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(pkgs.stdenv.targetPlatform.rust.rustcTarget
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!= pkgs.stdenv.hostPlatform.rust.rustcTarget)
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(
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let
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inherit (pkgs.stdenv.targetPlatform.rust) cargoEnvVarTarget;
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in
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{
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"CC_${cargoEnvVarTarget}" = envVars.ccForTarget;
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"CXX_${cargoEnvVarTarget}" = envVars.cxxForTarget;
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"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" =
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envVars.linkerForTarget;
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}
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)
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// (
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let
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inherit (pkgs.stdenv.hostPlatform.rust) cargoEnvVarTarget rustcTarget;
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in
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{
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"CC_${cargoEnvVarTarget}" = envVars.ccForHost;
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"CXX_${cargoEnvVarTarget}" = envVars.cxxForHost;
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"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.linkerForHost;
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CARGO_BUILD_TARGET = rustcTarget;
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}
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)
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// (
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let
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inherit (pkgs.stdenv.buildPlatform.rust) cargoEnvVarTarget;
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in
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{
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"CC_${cargoEnvVarTarget}" = envVars.ccForBuild;
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"CXX_${cargoEnvVarTarget}" = envVars.cxxForBuild;
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"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.linkerForBuild;
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HOST_CC = "${pkgs.buildPackages.stdenv.cc}/bin/cc";
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HOST_CXX = "${pkgs.buildPackages.stdenv.cc}/bin/c++";
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}
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));
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package = pkgs: builder pkgs {
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src = nix-filter {
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root = ./.;
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include = [
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"src"
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"Cargo.toml"
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"Cargo.lock"
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];
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};
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# This is redundant with CI
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doCheck = false;
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env = env pkgs;
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nativeBuildInputs = nativeBuildInputs pkgs;
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meta.mainProgram = cargoToml.package.name;
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};
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mkOciImage = pkgs: package:
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pkgs.dockerTools.buildImage {
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name = package.pname;
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tag = "main";
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copyToRoot = [
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pkgs.dockerTools.caCertificates
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];
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config = {
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# Use the `tini` init system so that signals (e.g. ctrl+c/SIGINT)
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# are handled as expected
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Entrypoint = [
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"${pkgs.lib.getExe' pkgs.tini "tini"}"
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"--"
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];
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Cmd = [
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"${pkgs.lib.getExe package}"
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];
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};
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};
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in
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{
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packages = {
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default = package pkgsHost;
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oci-image = mkOciImage pkgsHost self.packages.${system}.default;
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# Build an OCI image from the musl aarch64 build so we don't have to
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# build for aarch64 twice (to make a gnu version specifically for the
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# OCI image)
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oci-image-aarch64-unknown-linux-musl = mkOciImage
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pkgsHost
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self.packages.${system}.static-aarch64-unknown-linux-musl;
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# Don't build a musl x86_64 OCI image because that would be pointless.
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# Just use the gnu one (i.e. `self.packages."x86_64-linux".oci-image`).
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} // builtins.listToAttrs (
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builtins.map
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(crossSystem: {
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name = "static-${crossSystem}";
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value = package (import nixpkgs {
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inherit system;
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crossSystem = {
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config = crossSystem;
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};
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}).pkgsStatic;
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})
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[
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"x86_64-unknown-linux-musl"
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"aarch64-unknown-linux-musl"
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]
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);
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devShells.default = pkgsHost.mkShell {
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env = env pkgsHost // {
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# Rust Analyzer needs to be able to find the path to default crate
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# sources, and it can read this environment variable to do so. The
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# `rust-src` component is required in order for this to work.
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RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
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};
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# Development tools
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nativeBuildInputs = nativeBuildInputs pkgsHost ++ [
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# Always use nightly rustfmt because most of its options are unstable
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#
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# This needs to come before `toolchain` in this list, otherwise
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# `$PATH` will have stable rustfmt instead.
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fenix.packages.${system}.latest.rustfmt
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toolchain
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] ++ (with pkgsHost; [
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engage
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]);
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};
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});
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}
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