albatros/flake.nix

{
  description = "Albatros";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }: 
  with flake-utils.lib; let
      archmap = {
        aarch64-linux = {
          GOOS = "linux";
          GOARCH = "arm64";
        };
        x86_64-linux = {
          GOOS = "linux";
          GOARCH = "amd64";
        };
        i686-linux = {
          GOOS = "linux";
          GOARCH = "386";
        };
        armv6l-linux = {
          GOOS = "linux";
          GOARCH = "arm";
        };
      };
  in eachSystem [ 
      # supported systems
      system.x86_64-linux 
      system.i686-linux
      system.armv6l-linux
      system.aarch64-linux
    ] (targetHost: let 

      # Should be configurable
      buildSystem = system.x86_64-linux;

      # generic config
      albaVersion = "0.9";

      # nix repository
      pkgs = import nixpkgs {
        system = buildSystem;
        # we don't use nixos cross environment as it is slow and not required
        #crossSystem = {
        #  config = targetHost;
        #};
        overlays = [ ]; # we dropped the overlay we had, keep it as "skeleton".
      };     

      # declare the go module of this package
      albatrosProject = (pkgs.buildGoModule rec {
        pname = "albatros-go-module";
        version = albaVersion;
        src = ./.;
        CGO_ENABLED = 0;
        vendorSha256 = "sha256-KYjXb882jWLFO6zilQXlrZorL9tw/+6njQNkB6E9Er4=";
        dontCheck=true;
        buildPhase = ''
          go build bin/ci.go
          go build -tags containers_image_docker_daemon_stub,containers_image_storage_stub,containers_image_openpgp bin/alba.go
        '';
        installPhase = ''
            mkdir -p $out
            cp alba ci $out/
        '';
        meta = with pkgs.lib; {
          description = "albatros is a collection of tools to build your software supply chain";
          homepage = "https://git.deuxfleurs.fr/Deuxfleurs/albatros";
          license = licenses.agpl3;
          platforms = platforms.linux;
        };
      }).overrideAttrs (old: old // (builtins.getAttr targetHost archmap));


      # get only a statically compiled ci
      ci = pkgs.stdenv.mkDerivation {
        pname = "albatros-ci";
        version = albaVersion;
        dontUnpack = true;
        dontBuild = true;
        installPhase = ''
          cp ${albatrosProject}/ci $out
        '';
      };

      # get only a statically compiled alba tool
      alba = pkgs.stdenv.mkDerivation {
        pname = "albatros-alba";
        version = albaVersion;
        dontUnpack = true;
        dontBuild = true;
        installPhase = ''
          cp ${albatrosProject}/alba $out
        '';
      };

      # logic to build docker containers
      container = pkgs.dockerTools.buildImage {
        name = "dxflrs/albatros-ci";
        architecture = (builtins.getAttr targetHost archmap).GOARCH;
        config = {
         Cmd = [ "${ci}" ];
        };
      };

    # Exposed content
    in {
      packages = {
        inherit ci alba container;
        default = ci;
      };
    });
}