{
description = "Build a cargo project with a custom toolchain";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
crane = {
url = "github:ipetkov/crane";
inputs.nixpkgs.follows = "nixpkgs";
};
flake-utils.url = "github:numtide/flake-utils";
rust-overlay = {
url = "github:oxalica/rust-overlay";
inputs = {
nixpkgs.follows = "nixpkgs";
flake-utils.follows = "flake-utils";
};
};
};
outputs = { self, nixpkgs, crane, flake-utils, rust-overlay, ... }:
flake-utils.lib.eachDefaultSystem (system:
let
pkgs = import nixpkgs {
inherit system;
overlays = [ (import rust-overlay) ];
};
inherit (pkgs) lib;
rustOxalica = pkgs.rust-bin.stable.latest.default.override {
#targets = [ "wasm32-wasi" ];
};
# NB: we don't need to overlay our custom toolchain for the *entire*
# pkgs (which would require rebuidling anything else which uses rust).
# Instead, we just want to update the scope that crane will use by appending
# our specific toolchain there.
craneLib = (crane.mkLib pkgs).overrideToolchain rustOxalica;
commonArgs = {
src = ./.;
buildInputs = with pkgs; [
] ++ lib.optionals stdenv.isDarwin [
darwin.apple_sdk.frameworks.Security
];
# Extra inputs can be added here
nativeBuildInputs = with pkgs; [
rustOxalica
];
};
# Build *just* the cargo dependencies, so we can reuse
# all of that work (e.g. via cachix) when running in CI
cargoArtifacts = craneLib.buildDepsOnly (commonArgs // {
# Additional arguments specific to this derivation can be added here.
# Be warned that using `//` will not do a deep copy of nested
# structures
version = "dev";
});
# Run clippy (and deny all warnings) on the crate source,
# resuing the dependency artifacts (e.g. from build scripts or
# proc-macros) from above.
#
# Note that this is done as a separate derivation so it
# does not impact building just the crate by itself.
asherpaClippy = craneLib.cargoClippy (commonArgs // {
# Again we apply some extra arguments only to this derivation
# and not every where else. In this case we add some clippy flags
inherit cargoArtifacts;
cargoClippyExtraArgs = "-- --deny warnings";
});
# Check formatting
asherpaFmt = craneLib.cargoFmt (commonArgs // {
inherit cargoArtifacts;
});
# Run tests with cargo-nextest
# Consider setting `doCheck = false` on `my-crate` if you do not want
# the tests to run twice
asherpaNextest = craneLib.cargoNextest (commonArgs // {
inherit cargoArtifacts;
partitions = 1;
partitionType = "count";
} // lib.optionalAttrs (system == "x86_64-linux") {
# NB: cargo-tarpaulin only supports x86_64 systems
# Check code coverage (note: this will not upload coverage anywhere)
#asherpaCoverage = craneLib.cargoTarpaulin (commonArgs // {
# inherit cargoArtifacts;
#});
});
# Build the actual crate itself, reusing the dependency
# artifacts from above.
asherpa = craneLib.buildPackage (commonArgs // {
inherit cargoArtifacts;
src = ./.;
pname = "asherpa";
cargoExtraArgs = "--bin asherpa";
});
in
{
packages.default = asherpa;
apps.default = flake-utils.lib.mkApp {
drv = asherpa;
};
checks = {
inherit
# Build the crate as part of `nix flake check` for convenience
asherpaFmt
asherpaClippy
asherpaNextest;
};
devShells.default = pkgs.mkShell (commonArgs // {
inputsFrom = builtins.attrValues self.checks;
buildInputs = with pkgs; [
nixpkgs-fmt
cargo-udeps
cargo-outdated
cargo-watch
cargo-limit
];
});
});
}