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flake.nix
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flake.nix
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{
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
flake-utils.url = "github:numtide/flake-utils";
fenix = {
url = "github:nix-community/fenix";
inputs.nixpkgs.follows = "nixpkgs";
};
crane = {
url = "github:ipetkov/crane";
inputs.nixpkgs.follows = "nixpkgs";
inputs.flake-utils.follows = "flake-utils";
};
};
outputs =
{ self
, nixpkgs
, flake-utils
, fenix
, crane
}: flake-utils.lib.eachDefaultSystem (system:
let
pkgs = nixpkgs.legacyPackages.${system};
# Use mold on Linux
stdenv = if pkgs.stdenv.isLinux then
pkgs.stdenvAdapters.useMoldLinker pkgs.stdenv
else
pkgs.stdenv;
# Nix-accessible `Cargo.toml`
cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
# The Rust toolchain to use
toolchain = fenix.packages.${system}.toolchainOf {
# Use the Rust version defined in `Cargo.toml`
channel = cargoToml.package.rust-version;
# THE rust-version HASH
sha256 = "sha256-gdYqng0y9iHYzYPAdkC/ka3DRny3La/S5G8ASj0Ayyc=";
};
# The system's RocksDB
ROCKSDB_INCLUDE_DIR = "${pkgs.rocksdb}/include";
ROCKSDB_LIB_DIR = "${pkgs.rocksdb}/lib";
# Shared between the package and the devShell
nativeBuildInputs = (with pkgs.rustPlatform; [
bindgenHook
]);
builder =
((crane.mkLib pkgs).overrideToolchain toolchain.toolchain).buildPackage;
in
{
packages.default = builder {
src = ./.;
inherit
stdenv
nativeBuildInputs
ROCKSDB_INCLUDE_DIR
ROCKSDB_LIB_DIR;
};
devShells.default = (pkgs.mkShell.override { inherit stdenv; }) {
# Rust Analyzer needs to be able to find the path to default crate
# sources, and it can read this environment variable to do so
RUST_SRC_PATH = "${toolchain.rust-src}/lib/rustlib/src/rust/library";
inherit
ROCKSDB_INCLUDE_DIR
ROCKSDB_LIB_DIR;
# Development tools
nativeBuildInputs = nativeBuildInputs ++ (with toolchain; [
cargo
clippy
rust-src
rustc
rustfmt
]);
};
checks = {
packagesDefault = self.packages.${system}.default;
devShellsDefault = self.devShells.${system}.default;
};
});
}