languages/vala: init (#432)

* vala: init

* vala: applying reviews

* vala: making formatter work

* vala: cleaning up useless import

* vala: wrapping uncrustify

* vala: added changelog entry

configuration.nix

@@ -73,6 +73,7 @@ isMaximal: {
       };
       csharp.enable = isMaximal;
       julia.enable = isMaximal;
+      vala.enable = isMaximal;
     };
 
     visuals = {

docs/release-notes/rl-0.7.md

@@ -292,6 +292,7 @@ To migrate to `nixfmt`, simply change `vim.languages.nix.format.type` to
 - Add LSP, diagnostics, formatter and Treesitter support for Kotlin under
   `vim.languages.kotlin`
 - changed default keybinds for leap.nvim to avoid altering expected behavior
+- Add LSP, formatter and Treesitter support for Vala under `vim.languages.vala`
 
 [Bloxx12](https://github.com/Bloxx12)
 

modules/plugins/languages/default.nix

@@ -14,6 +14,7 @@ in {
     ./lua.nix
     ./markdown.nix
     ./nim.nix
+    ./vala.nix
     ./nix.nix
     ./ocaml.nix
     ./php.nix

modules/plugins/languages/vala.nix

@@ -0,0 +1,79 @@
+{
+  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.types) mkGrammarOption;
+  inherit (lib.nvim.lua) expToLua;
+
+  cfg = config.vim.languages.vala;
+
+  defaultServer = "vala_ls";
+  servers = {
+    vala_ls = {
+      package = pkgs.symlinkJoin {
+        name = "vala-language-server-wrapper";
+        paths = [pkgs.vala-language-server];
+        buildInputs = [pkgs.makeBinaryWrapper];
+        postBuild = ''
+          wrapProgram $out/bin/vala-language-server \
+            --prefix PATH : ${pkgs.uncrustify}/bin
+        '';
+      };
+      internalFormatter = true;
+      lspConfig = ''
+        lspconfig.vala_ls.setup {
+          capabilities = capabilities;
+          on_attach = default_on_attach;
+          cmd = ${
+          if isList cfg.lsp.package
+          then expToLua cfg.lsp.package
+          else ''{"${cfg.lsp.package}/bin/vala-language-server"}''
+        },
+        }
+      '';
+    };
+  };
+in {
+  options.vim.languages.vala = {
+    enable = mkEnableOption "Vala language support";
+
+    treesitter = {
+      enable = mkEnableOption "Vala treesitter" // {default = config.vim.languages.enableTreesitter;};
+      package = mkGrammarOption pkgs "vala";
+    };
+
+    lsp = {
+      enable = mkEnableOption "Vala LSP support" // {default = config.vim.languages.enableLSP;};
+      server = mkOption {
+        description = "Vala LSP server to use";
+        type = enum (attrNames servers);
+        default = defaultServer;
+      };
+
+      package = mkOption {
+        description = "Vala LSP server package, or the command to run as a list of strings";
+        type = either package (listOf str);
+        default = servers.${cfg.lsp.server}.package;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter.enable = true;
+      vim.treesitter.grammars = [cfg.treesitter.package];
+    })
+
+    (mkIf cfg.lsp.enable {
+      vim.lsp.lspconfig.enable = true;
+      vim.lsp.lspconfig.sources.vala_ls = servers.${cfg.lsp.server}.lspConfig;
+    })
+  ]);
+}