garage/flake.nix

{
  description =
    "Garage, an S3-compatible distributed object store for self-hosted deployments";

  # Nixpkgs 24.11 as of 2025-01-12 has rustc v1.82
  inputs.nixpkgs.url =
    "github:NixOS/nixpkgs/7c4869c47090dd7f9f1bdfb49a22aea026996815";

  inputs.flake-compat.url = "github:nix-community/flake-compat";

  inputs.cargo2nix = {
    # As of 2022-10-18: two small patches over unstable branch, one for clippy and one to fix feature detection
    #url = "github:Alexis211/cargo2nix/a7a61179b66054904ef6a195d8da736eaaa06c36";

    # As of 2023-04-25:
    # - my two patches were merged into unstable (one for clippy and one to "fix" feature detection)
    # - rustc v1.66
    # url = "github:cargo2nix/cargo2nix/8fb57a670f7993bfc24099c33eb9c5abb51f29a2";

    # Mainline cargo2nix as of of 2025-01-12 (branch release-0.11.0)
    url = "github:cargo2nix/cargo2nix/ae19a9e1f8f0880c088ea155ab66cee1fa001f59";

    # Rust overlay as of 2025-01-12
    inputs.rust-overlay.url =
      "github:oxalica/rust-overlay/162ab0edc2936508470199b2e8e6c444a2535019";

    inputs.nixpkgs.follows = "nixpkgs";
    inputs.flake-compat.follows = "flake-compat";
  };

  inputs.flake-utils.follows = "cargo2nix/flake-utils";
  inputs.rust-overlay.follows = "cargo2nix/rust-overlay";

  outputs = { self, nixpkgs, cargo2nix, flake-utils, rust-overlay, ... }:
    let
      git_version = self.lastModifiedDate;
      compile = import ./nix/compile.nix;
    in
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
        }; 
        nativeBuild = 
          pkgs.callPackage ./Cargo.nix {
            release = false;
          };
        crossBuild = target:
          let
            crossPkgs = import nixpkgs {
              inherit system;
              crossSystem = {
                config = target;
              };
              overlays = [ rust-overlay.overlays.default ];
            }; 
            buildRustCrateForPkgs = pkgs: pkgs.buildRustCrate.override {
                rustc = pkgs.rust-bin.stable."1.77.0".default;
                cargo = pkgs.rust-bin.stable."1.77.0".default;
              };
          in
            crossPkgs.callPackage ./Cargo.nix {
              inherit buildRustCrateForPkgs;
              release = false;
            };
      in
      {
        packages =
          {
            # default = native release build
            default = nativeBuild.workspaceMembers."garage".build;
            # cross-platform builds
            amd64 = (crossBuild "x86_64-linux").workspaceMembers."garage".build;
            i386 = (crossBuild "i686-linux").workspaceMembers."garage".build;
          };

        # ---- developpment shell, for making native builds only ----
        devShells =
          let
            shellWithPackages = (packages: (compile {
              inherit system git_version;
              pkgsSrc = nixpkgs;
              cargo2nixOverlay = cargo2nix.overlays.default;
            }).workspaceShell { inherit packages; });
          in
          {
            default = shellWithPackages
              (with pkgs; [
                rustfmt
                clang
                mold
              ]);

            # import the full shell using `nix develop .#full`
            full = shellWithPackages (with pkgs; [
              rustfmt
              rust-analyzer
              clang
              mold
              # ---- extra packages for dev tasks ----
              cargo-audit
              cargo-outdated
              cargo-machete
              nixpkgs-fmt
            ]);
          };
      });
}