feat: initial v3 rewrite

lib/impl/modules/root.nix

@@ -0,0 +1,61 @@
+{
+  lib,
+  soonixSubmodule,
+  pipelineSubmodule,
+  ...
+}: let
+  inherit (lib) mkOption types;
+in rec {
+  configSubmodule = {
+    options = {
+      soonix = mkOption {
+        description = "Configure the soonix '.gitlab-ci.yml' generation";
+        type = types.submodule soonixSubmodule;
+        default = {};
+      };
+      nixJobsByDefault = mkOption {
+        description = ''
+          Whether to transform all jobs to nix-configured jobs by default.
+          If false, you need to set `nix.enable` for each job you want to be transformed.
+        '';
+        type = types.bool;
+        default = true;
+      };
+    };
+  };
+
+  nixCiSubmodule = {config, ...}: {
+    options = {
+      config = mkOption {
+        description = "Configuration of Nix-GitLab-CI itself";
+        type = types.submodule configSubmodule;
+        default = {};
+      };
+      pipelines = mkOption {
+        description = "Defines all pipelines";
+        type = types.attrsOf (types.submoduleWith {
+          modules = [pipelineSubmodule];
+          specialArgs.rootConfig = config.config;
+        });
+        default = {};
+      };
+
+      packages = mkOption {
+        description = "Final packages for use in CI";
+        internal = true;
+        type = types.attrsOf types.package;
+      };
+      soonix = mkOption {
+        description = "Soonix config for .gitlab-ci.yml";
+        internal = true;
+        type = types.attrs;
+      };
+    };
+    config = {
+      packages = lib.fold (pipeline: acc: acc // pipeline) {} (
+        map (pipeline: pipeline.packages) (builtins.attrValues config.pipelines)
+      );
+      soonix = config.config.soonix.finalConfig;
+    };
+  };
+}