languages/gleam: init (#482)

* modules/gleam: init

* gleam: not using formatter

* configuration: gleam set to false

* docs: added changelog entry for gleam

* gleam: fixed lsp and treesitter

* gleam: capitalisation

configuration.nix

@@ -65,6 +65,7 @@ isMaximal: {
       python.enable = isMaximal;
       dart.enable = isMaximal;
       bash.enable = isMaximal;
+      gleam.enable = false;
       r.enable = isMaximal;
       tailwind.enable = isMaximal;
       typst.enable = isMaximal;

docs/release-notes/rl-0.7.md

@@ -359,6 +359,7 @@ The changes are, in no particular order:
 - Add LSP and Treesitter support for Assembly under `vim.languages.assembly`
 - Move [which-key](https://github.com/folke/which-key.nvim) to the new spec
 - Add LSP and Treesitter support for Nushell under `vim.languages.nu`
+- Add LSP and Treesitter support for Gleam under `vim.languages.gleam`
 
 [Bloxx12](https://github.com/Bloxx12)
 

modules/plugins/languages/default.nix

@@ -9,6 +9,7 @@ in {
     ./clang.nix
     ./css.nix
     ./elixir.nix
+    ./gleam.nix
     ./go.nix
     ./hcl.nix
     ./kotlin.nix

modules/plugins/languages/gleam.nix

@@ -0,0 +1,71 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (builtins) attrNames;
+  inherit (lib.options) mkEnableOption mkOption;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.lists) isList;
+  inherit (lib.types) enum either listOf package str;
+  inherit (lib.nvim.lua) expToLua;
+  inherit (lib.nvim.types) mkGrammarOption;
+
+  cfg = config.vim.languages.gleam;
+
+  defaultServer = "gleam";
+  servers = {
+    gleam = {
+      package = pkgs.gleam;
+      lspConfig = ''
+        lspconfig.gleam.setup{
+          capabilities = capabilities,
+          on_attach = default_on_attach,
+          cmd = ${
+          if isList cfg.lsp.package
+          then expToLua cfg.lsp.package
+          else ''{"${cfg.lsp.package}/bin/gleam", "lsp"}''
+        }
+        }
+      '';
+    };
+  };
+in {
+  options.vim.languages.gleam = {
+    enable = mkEnableOption "Gleam language support";
+
+    treesitter = {
+      enable = mkEnableOption "Gleam treesitter" // {default = config.vim.languages.enableTreesitter;};
+      package = mkGrammarOption pkgs "gleam";
+    };
+
+    lsp = {
+      enable = mkEnableOption "Gleam LSP support" // {default = config.vim.languages.enableLSP;};
+
+      server = mkOption {
+        type = enum (attrNames servers);
+        default = defaultServer;
+        description = "Gleam LSP server to use";
+      };
+
+      package = mkOption {
+        type = either package (listOf str);
+        default = servers.${cfg.lsp.server}.package;
+        description = "Gleam LSP server package, or the command to run as a list of strings";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter.enable = true;
+      vim.treesitter.grammars = [cfg.treesitter.package];
+    })
+
+    (mkIf cfg.lsp.enable {
+      vim.lsp.lspconfig.enable = true;
+      vim.lsp.lspconfig.sources.gleam-lsp = servers.${cfg.lsp.server}.lspConfig;
+    })
+  ]);
+}