flake.nix

{
  description = "Music Player - An extensible music server written in Rust 🚀🎵✨";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";

    crane = {
      url = "github:ipetkov/crane";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.rust-analyzer-src.follows = "";
    };

    flake-utils.url = "github:numtide/flake-utils";

    advisory-db = {
      url = "github:rustsec/advisory-db";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, crane, fenix, flake-utils, advisory-db, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
        };

        inherit (pkgs) lib;

        craneLib = crane.lib.${system};
        
        protoFilter = path: _type: builtins.match ".*proto$" path != null;
        protoOrCargo = path: type:
          (protoFilter path type) || (craneLib.filterCargoSources path type);

        # src = craneLib.cleanCargoSource (craneLib.path ./.);
        src = lib.cleanSourceWith {
          src = craneLib.path ./.; # The original, unfiltered source
          filter = protoOrCargo;
        };

        # Common arguments can be set here to avoid repeating them later
        commonArgs = {
          inherit src;

          buildInputs = [
            # Add additional build inputs here
            pkgs.pkgconfig
            pkgs.gnumake
            pkgs.protobuf
            pkgs.zstd
            pkgs.bun
            pkgs.nodejs_18
          ] ++ lib.optionals pkgs.stdenv.isDarwin [
            # Additional darwin specific inputs can be set here
            pkgs.libiconv
            pkgs.darwin.Security
          ] ++ lib.optionals pkgs.stdenv.isLinux [
            # Packages specific to Linux
            pkgs.alsa-lib.dev
          ];

          # Additional environment variables can be set directly
          # MY_CUSTOM_VAR = "some value";
        };

        craneLibLLvmTools = craneLib.overrideToolchain
          (fenix.packages.${system}.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.
        music-player = craneLib.buildPackage (commonArgs // {
          inherit cargoArtifacts;
        });

      in
      {
        checks = {
          # Build the crate as part of `nix flake check` for convenience
          inherit music-player;

          # 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.
          music-player-clippy = craneLib.cargoClippy (commonArgs // {
            inherit cargoArtifacts;
            cargoClippyExtraArgs = "--all-targets -- --deny warnings";
          });

          music-player-doc = craneLib.cargoDoc (commonArgs // {
            inherit cargoArtifacts;
          });

          # Check formatting
          music-player-fmt = craneLib.cargoFmt {
            inherit src;
          };

          # Audit dependencies
          music-player-audit = craneLib.cargoAudit {
            inherit src advisory-db;
          };

          # Run tests with cargo-nextest
          # Consider setting `doCheck = false` on `music-player` if you do not want
          # the tests to run twice
          music-player-nextest = 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)
          music-player-coverage = craneLib.cargoTarpaulin (commonArgs // {
            inherit cargoArtifacts;
          });
        };

        packages = {
          default = music-player;
          music-player-llvm-coverage = craneLibLLvmTools.cargoLlvmCov (commonArgs // {
            inherit cargoArtifacts;
          });
        };

        apps.default = flake-utils.lib.mkApp {
          drv = music-player;
        };

        devShells.default = pkgs.mkShell {
          inputsFrom = builtins.attrValues self.checks.${system};

          # Additional dev-shell environment variables can be set directly
          # MY_CUSTOM_DEVELOPMENT_VAR = "something else";

          # Extra inputs can be added here
          nativeBuildInputs = with pkgs; [
            cargo
            rustc
          ];
        };
      });
}