feat: implement flutter-tools.nvim

modules/lsp/flutter-tools-nvim/config.nix

@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  ...
+}:
+with lib;
+with builtins; let
+  cfg = config.vim.lsp;
+  ftcfg = cfg.dart.flutter-tools;
+in {
+  config = mkIf (cfg.enable && ftcfg.enable) {
+    vim.startPlugins = ["flutter-tools"];
+
+    vim.luaConfigRC.flutter-tools = nvim.dag.entryAnywhere ''
+      require('flutter-tools').setup {
+        lsp = {
+          color = { -- show the derived colours for dart variables
+            enabled = ${boolToString ftcfg.color.enable}, -- whether or not to highlight color variables at all, only supported on flutter >= 2.10
+            background = ${boolToString ftcfg.color.highlightBackground}, -- highlight the background
+            foreground = ${boolToString ftcfg.color.highlightForeground}, -- highlight the foreground
+            virtual_text = ${boolToString ftcfg.color.virtualText.enable}, -- show the highlight using virtual text
+            virtual_text_str = ${ctcfg.color.virtualText.character} -- the virtual text character to highlight
+          },
+
+          capabilities = capabilities,
+          on_attach = default_on_attach;
+          flags = lsp_flags,
+        },
+      }
+
+    '';
+  };
+}

modules/lsp/flutter-tools-nvim/default.nix

@@ -0,0 +1,6 @@
+_: {
+  imports = [
+    ./flutter-tools.nix
+    ./config.nix
+  ];
+}

modules/lsp/flutter-tools-nvim/flutter-tools.nix

@@ -0,0 +1,35 @@
+{
+  config,
+  lib,
+  ...
+}:
+with lib;
+with builtins; {
+  options.vim.lsp.dart.flutter-tools = {
+    color = {
+      enable = mkEnableOption "Whether or mot to highlight color variables at all";
+
+      highlightBackground = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Highlight the background";
+      };
+
+      highlightForeground = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Highlight the foreground";
+      };
+
+      virtualText = {
+        enable = mkEnableOption "Show the highlight using virtual text";
+
+        character = mkOption {
+          type = types.str;
+          default = "■";
+          description = "Virtual text character to highlight";
+        };
+      };
+    };
+  };
+}