{ inputs = { crane.url = "github:ipetkov/crane"; flake-utils.url = "github:numtide/flake-utils"; fenix.url = "github:nix-community/fenix"; nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; advisory-db = { flake = false; url = "github:rustsec/advisory-db"; }; }; outputs = { self, crane, fenix, flake-utils, nixpkgs, advisory-db }: flake-utils.lib.eachDefaultSystem (system: let pkgs = nixpkgs.legacyPackages.${system}; fenixPkgs = fenix.packages.${system}; craneLib = crane.lib.${system}; src = craneLib.cleanCargoSource (craneLib.path ./.); # Common arguments can be set here to avoid repeating them later commonArgs = { inherit src; strictDeps = true; buildInputs = [ # Add additional build inputs here ] ++ pkgs.lib.optionals pkgs.stdenv.isDarwin [ # Additional darwin specific inputs can be set here pkgs.libiconv ]; # Additional environment variables can be set directly # MY_CUSTOM_VAR = "some value"; }; craneLibLLvmTools = craneLib.overrideToolchain (fenixPkgs.complete.withComponents [ "cargo" "llvm-tools" "rustc" ]); # 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; # Build the actual crate itself, reusing the dependency # artifacts from above. crate = craneLib.buildPackage (commonArgs // { inherit cargoArtifacts; }); in { checks = { # Build the crate as part of `nix flake check` for convenience inherit crate; # Run clippy (and deny all warnings) on the crate source, # again, resuing the dependency artifacts from above. # # Note that this is done as a separate derivation so that # we can block the CI if there are issues here, but not # prevent downstream consumers from building our crate by itself. clippy = craneLib.cargoClippy (commonArgs // { inherit cargoArtifacts; cargoClippyExtraArgs = "--all-targets -- --deny warnings"; }); doc = craneLib.cargoDoc (commonArgs // { inherit cargoArtifacts; }); # Check formatting fmt = craneLib.cargoFmt { inherit src; }; # Audit dependencies audit = craneLib.cargoAudit { inherit src advisory-db; }; # Audit licenses deny = craneLib.cargoDeny { inherit src; }; # Run tests with cargo-nextest # Consider setting `doCheck = false` on `my-crate` if you do not want # the tests to run twice nextest = craneLib.cargoNextest (commonArgs // { inherit cargoArtifacts; partitions = 1; partitionType = "count"; }); }; packages = { default = crate; llvm-coverage = craneLibLLvmTools.cargoLlvmCov (commonArgs // { inherit cargoArtifacts; }); }; apps.default = flake-utils.lib.mkApp { drv = crate; }; devShells.default = craneLib.devShell { # Inherit inputs from checks. # Enable after Cargo.toml and Cargo.lock are present # Consider customizing deny.toml # checks = self.checks.${system}; # Additional dev-shell environment variables can be set directly # MY_CUSTOM_DEVELOPMENT_VAR = "something else"; # Extra inputs can be added here; cargo and rustc are provided by default packages = [ fenixPkgs.rust-analyzer # pkgs.ripgrep ]; }; }); }