terranix: use new flakeModule

2 files changed, 96 insertions, 4 deletions

diff --git a/modules/flake/configurations.nix b/modules/flake/configurations.nix
index 3d2d512..ef1ae4e 100644
--- a/modules/flake/configurations.nix
+++ b/modules/flake/configurations.nix
@@ -156,8 +156,8 @@
       example = literalExpression ''
         {
           foo = {
-        	  system = "aarch64-${kernelFor type}";
-        	};
+            system = "aarch64-${kernelFor type}";
+          };
         }
       '';
       description = mdDoc ''
@@ -192,8 +192,8 @@ in {
           example = literalExpression ''
             {
               john = {
-            	  pkgs = inputs.nixpkgs.legacyPackages.aarch64-linux;
-            	};
+                pkgs = inputs.nixpkgs.legacyPackages.aarch64-linux;
+              };
             }
           '';
           description = mdDoc ''
diff --git a/modules/flake/terranix.nix b/modules/flake/terranix.nix
new file mode 100644
index 0000000..66f79b9
--- /dev/null
+++ b/modules/flake/terranix.nix
@@ -0,0 +1,92 @@
+{
+  lib,
+  flake-parts-lib,
+  ...
+}: let
+  namespace = "terranix";
+
+  inherit
+    (lib)
+    literalExpression
+    mdDoc
+    mkOption
+    mkPackageOption
+    types
+    ;
+
+  inherit
+    (flake-parts-lib)
+    mkPerSystemOption
+    ;
+in {
+  options = {
+    perSystem = mkPerSystemOption ({
+      config,
+      pkgs,
+      system,
+      self',
+      ...
+    }: let
+      cfg = config.${namespace};
+    in {
+      options.${namespace} = {
+        builder = mkOption {
+          type = types.functionTo (types.lazyAttrsOf types.raw);
+          example = literalExpression "inputs.terranix.lib.terranixConfiguration";
+          description = mdDoc ''
+            Function used to build this terranixConfiguration
+          '';
+        };
+
+        modules = mkOption {
+          type = types.listOf types.unspecified;
+          default = [];
+          example = literalExpression "[ ./terranix ]";
+          description = mdDoc ''
+            Modules to use in this terranixConfiguration
+          '';
+        };
+
+        configuration = mkOption {
+          type = types.pathInStore;
+          readOnly = true;
+          description = mdDoc ''
+            Final configuration created by terranix
+          '';
+        };
+
+        package = mkPackageOption pkgs "opentofu" {
+          default = ["opentofu"];
+          example = literalExpression "pkgs.opentofu.withPlugins (plugins: [ plugins.tailscale ] )";
+        };
+      };
+
+      config = {
+        terranix.configuration = cfg.builder {
+          inherit system;
+          inherit (cfg) modules;
+        };
+
+        apps.gen-terranix = {
+          program = pkgs.writeShellApplication {
+            name = "gen-tf";
+
+            text = ''
+              config_file="config.tf.json"
+              [ -e "$config_file" ] && rm -f "$config_file"
+              cp ${cfg.configuration} "$config_file"
+            '';
+          };
+        };
+
+        devShells.terranix = pkgs.mkShellNoCC {
+          shellHook = ''
+            ${self'.apps.gen-terranix.program}
+          '';
+
+          packages = [pkgs.just cfg.package];
+        };
+      };
+    });
+  };
+}