flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    systems.url = "github:nix-systems/default";
    php-src-master = {
      url = "github:php/php-src/master";
      flake = false;
    };
    php-src-81 = {
      url = "github:php/php-src/PHP-8.1";
      flake = false;
    };
    php-src-82 = {
      url = "github:php/php-src/PHP-8.2";
      flake = false;
    };
    php-src-83 = {
      url = "github:php/php-src/PHP-8.3";
      flake = false;
    };
    php-src-84 = {
      url = "github:php/php-src/PHP-8.4";
      flake = false;
    };
  };

  outputs =
    inputs@{
      self,
      flake-parts,
      systems,
      ...
    }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = import systems;

      imports = [ inputs.flake-parts.flakeModules.easyOverlay ];

      flake = {
        overlays.active = import ./src/overlays/active.nix inputs;
        overlays.archive = import ./src/overlays/archive.nix inputs;
        overlays.snapshot = import ./src/overlays/snapshot.nix inputs;
      };

      perSystem =
        {
          self',
          pkgs,
          system,
          lib,
          ...
        }:
        let
          packages =
            lib.foldlAttrs (
              acc: name: value:
              acc // { "${name}" = value; }
            ) { } (inputs.self.overlays.archive pkgs pkgs)
            // (inputs.self.overlays.active pkgs pkgs)
            // (inputs.self.overlays.snapshot pkgs pkgs);
        in
        {
          _module.args.pkgs = import self.inputs.nixpkgs {
            inherit system;
            overlays = [ inputs.self.overlays.active ];
            config.allowUnfree = true;
          };
          checks = self'.packages;

          formatter = pkgs.nixfmt-rfc-style;

          overlayAttrs = self'.packages;

          inherit packages;
        };
    };
}