domani/flake.nix

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{
inputs = {
fenix.url = "github:nix-community/fenix";
fenix.inputs.nixpkgs.follows = "nixpkgs";
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naersk.url = "github:nix-community/naersk/master";
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
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};
outputs = { self, nixpkgs, naersk, fenix }: let
newBuildTarget = {
nixPkgsSystem,
rustTarget ? nixPkgsSystem,
nativeBuildInputs ? pkgsCross: [],
rustFlags ? pkgsCross: [],
}: {
inherit nixPkgsSystem rustTarget nativeBuildInputs rustFlags;
};
buildTargets = {
"x86_64-linux" = newBuildTarget {
nixPkgsSystem = "x86_64-unknown-linux-musl";
};
"i686-linux" = newBuildTarget {
nixPkgsSystem = "i686-unknown-linux-musl";
};
"aarch64-linux" = newBuildTarget {
nixPkgsSystem = "aarch64-unknown-linux-musl";
};
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# Old Raspberry Pi's
"armv6l-linux" = newBuildTarget {
nixPkgsSystem = "armv6l-unknown-linux-musleabihf";
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rustTarget = "arm-unknown-linux-musleabihf";
};
"x86_64-windows" = newBuildTarget {
nixPkgsSystem = "x86_64-w64-mingw32";
rustTarget = "x86_64-pc-windows-gnu";
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nativeBuildInputs = pkgsCross: [
pkgsCross.stdenv.cc
pkgsCross.windows.pthreads
];
rustFlags = pkgsCross: [
"-C" "link-arg=-L${pkgsCross.windows.pthreads}/lib"
];
};
};
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# eachSystem [system] (system: ...)
#
# Returns an attrset with a key for every system in the given array, with
# the key's value being the result of calling the callback with that key.
eachSystem = supportedSystems: callback: builtins.foldl'
(overall: system: overall // { ${system} = callback system; })
{}
supportedSystems;
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# eachCrossSystem [system] ({buildSystem, targetSystem, isDefault }: ...)
#
# Returns an attrset with a key "$buildSystem.cross-$targetSystem" for
# every combination of the elements of the array of system strings. The
# value of the attrs will be the result of calling the callback with each
# combination.
#
# There will also be keys "$system.default", which are aliases of
# "$system.cross-$system" for every system.
#
eachCrossSystem = supportedSystems: callback:
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eachSystem supportedSystems (buildSystem: let
pkgs = mkPkgs buildSystem null;
crosses = builtins.foldl'
(inner: targetSystem: inner // {
"cross-${targetSystem}" = callback {
inherit buildSystem targetSystem;
isDefault = false;
};
})
{}
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supportedSystems;
in
crosses // (rec {
default = callback {
inherit buildSystem;
targetSystem = buildSystem;
isDefault = true;
};
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release = let
bins = pkgs.symlinkJoin {
name = "${default.name}-all-bins";
paths = builtins.attrValues crosses;
};
in
pkgs.runCommand "${default.name}-release" {} ''
cp -rL "${bins}" "$out"
chmod +w "$out"/bin
(cd "$out"/bin && sha256sum * > sha256.txt)
'';
})
);
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mkPkgs = buildSystem: targetSystem: import nixpkgs ({
system = buildSystem;
} // (if targetSystem == null then {} else {
# The nixpkgs cache doesn't have any packages where cross-compiling has
# been enabled, even if the target platform is actually the same as the
# build platform (and therefore it's not really cross-compiling). So we
# only set up the cross-compiling config if the target platform is
# different.
crossSystem.config = buildTargets.${targetSystem}.nixPkgsSystem;
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}));
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mkToolchain = buildSystem: targetSystem: let
buildTarget = buildTargets.${targetSystem};
rustTarget = buildTarget.rustTarget;
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fenixPkgs = fenix.packages.${buildSystem};
# TODO I'd prefer to use the toolchain file
# https://github.com/nix-community/fenix/issues/123
fenixToolchain = fenixTarget: (builtins.getAttr "toolchainOf" fenixTarget) {
channel = "1.76.0";
sha256 = "sha256-e4mlaJehWBymYxJGgnbuCObVlqMlQSilZ8FljG9zPHY=";
};
in
fenixPkgs.combine [
(fenixToolchain fenixPkgs).rustc
(fenixToolchain fenixPkgs).rustfmt
(fenixToolchain fenixPkgs).cargo
(fenixToolchain fenixPkgs).clippy
(fenixToolchain (fenixPkgs.targets).${rustTarget}).rust-std
];
buildEnv = buildSystem: targetSystem: let
pkgs = mkPkgs buildSystem null;
pkgsCross = mkPkgs buildSystem targetSystem;
buildTarget = buildTargets.${targetSystem};
in
rec {
nativeBuildInputs = (buildTarget.nativeBuildInputs pkgsCross) ++ [
(mkToolchain buildSystem targetSystem)
# Required for shell because of rust dependency build scripts which
# must run on the build system.
pkgs.stdenv.cc
];
OPENSSL_STATIC = "1";
OPENSSL_LIB_DIR = "${pkgsCross.pkgsStatic.openssl.out}/lib";
OPENSSL_INCLUDE_DIR = "${pkgsCross.pkgsStatic.openssl.dev}/include";
# Required because ring crate is special. This also seems to have
# fixed some issues with the x86_64-windows cross-compile :shrug:
TARGET_CC = "${pkgsCross.stdenv.cc}/bin/${pkgsCross.stdenv.cc.targetPrefix}cc";
CARGO_BUILD_TARGET = buildTarget.rustTarget;
CARGO_BUILD_RUSTFLAGS = [
"-C" "target-feature=+crt-static"
# -latomic is required to build openssl-sys for armv6l-linux, but
# it doesn't seem to hurt any other builds.
"-C" "link-args=-static -latomic"
# https://github.com/rust-lang/cargo/issues/4133
"-C" "linker=${TARGET_CC}"
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] ++ (buildTarget.rustFlags pkgsCross);
};
in {
packages = eachCrossSystem
(builtins.attrNames buildTargets)
({ buildSystem, targetSystem, isDefault }: let
pkgs = mkPkgs buildSystem null;
toolchain = mkToolchain buildSystem targetSystem;
naersk-lib = pkgs.callPackage naersk {
cargo = toolchain;
rustc = toolchain;
};
in
naersk-lib.buildPackage (rec {
src = ./.;
strictDeps = true;
doCheck = false;
release = true;
postInstall = if isDefault then "" else ''
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cd "$out"/bin
for f in "$(ls)"; do
if ext="$(echo "$f" | grep -oP '\.[a-z]+$')"; then
base="$(echo "$f" | cut -d. -f1)"
mv "$f" "$base-${targetSystem}$ext"
else
mv "$f" "$f-${targetSystem}"
fi
done
'';
} // (buildEnv buildSystem targetSystem))
);
devShells = eachCrossSystem
(builtins.attrNames buildTargets)
({ buildSystem, targetSystem, isDefault }: let
pkgs = mkPkgs buildSystem null;
toolchain = mkToolchain buildSystem targetSystem;
in
pkgs.mkShell ({
shellHook = ''
export CARGO_HOME=$(pwd)/.cargo
if [ -f "config-dev.yml" ]; then
export DOMANI_CONFIG_PATH=config-dev.yml
fi
'';
} // (buildEnv buildSystem targetSystem))
);
};
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}