flake-checker/flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";

    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "flake-utils";
    };

    crane = {
      url = "github:ipetkov/crane";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-compat.follows = "flake-compat";
      inputs.flake-utils.follows = "flake-utils";
    };

    flake-compat = {
      url = "github:edolstra/flake-compat";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, flake-utils, rust-overlay, crane, ... }:
    let
      supportedSystems = flake-utils.lib.defaultSystems;
    in
    flake-utils.lib.eachSystem supportedSystems (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [
            rust-overlay.overlay
          ];
        };

        inherit (pkgs) lib;

        cranePkgs = pkgs.callPackage ./crane.nix {
          inherit crane supportedSystems;
        };
      in
      {
        packages = rec {
          inherit (cranePkgs) flake-checker;
          default = flake-checker;
        };
        devShells = {
          default = pkgs.mkShell ({
            inputsFrom = [ cranePkgs.flake-checker ];
            packages = with pkgs; [
              bashInteractive
              cranePkgs.rustNightly

              cargo-bloat
              cargo-edit
              cargo-udeps
              cargo-edit
              cargo-watch
              rust-analyzer
            ];
          } // cranePkgs.cargoCrossEnvs);
        };
      });
}