Fix yaml-language-server and helm-ls integration (#1125)

* lib/languages: fix typo in server submodule

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I6a6a6964c495ef58a9572ae93715bacf694a6ff5

* wrapper/build: add option examples; put evaluated values in `literalExpression`

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I6a6a69648220a65886994d4cac67f634a61815d5

* languages/yaml: fix on_attach by using mkLuaInline

* languages/helm: fix yaml-language-server integration

* language/yaml: call default_on_attach in helm version

---------

Signed-off-by: NotAShelf <raf@notashelf.dev>
Co-authored-by: raf <raf@notashelf.dev>

docs/release-notes/rl-0.8.md

@@ -289,6 +289,10 @@
 - Fix [blink.cmp] breaking when built-in sources were modified.
 - Fix [conform.nvim] not allowing disabling formatting on and after save. Use
   `null` value to disable them if conform is enabled.
+- Fix Helm-YAML language module integration. YAML diagnostics will now remain in
+  `helmfile`s when both are enabled.
+- Fix YAML language module not activating LSP keybinds if the Helm language
+  module was also enabled.
 
 [TheColorman](https://github.com/TheColorman):
 

modules/plugins/languages/helm.nix

@@ -6,7 +6,7 @@
 }: let
   inherit (builtins) attrNames head;
   inherit (lib.options) mkEnableOption mkOption;
-  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.modules) mkDefault mkIf mkMerge;
   inherit (lib.meta) getExe;
   inherit (lib.types) enum;
   inherit (lib.nvim.types) mkGrammarOption singleOrListOf;
@@ -27,11 +27,13 @@
           dynamicRegistration = true;
         };
       };
-      settings = {
+      settings = mkIf (yamlCfg.enable && yamlCfg.lsp.enable) {
         helm-ls = {
           yamlls = {
-            # TODO: Determine if this is a good enough solution
-            path = (head yamlCfg.lsp.servers).cmd;
+            # Without this being enabled, the YAML language module will look broken in helmfiles
+            # if both modules are enabled at once.
+            enabled = mkDefault yamlCfg.lsp.enable;
+            path = head config.vim.lsp.servers.${head yamlCfg.lsp.servers}.cmd;
           };
         };
       };

modules/plugins/languages/yaml.nix

@@ -5,6 +5,7 @@
   ...
 }: let
   inherit (builtins) attrNames;
+  inherit (lib.generators) mkLuaInline;
   inherit (lib.options) mkEnableOption mkOption;
   inherit (lib.modules) mkIf mkMerge;
   inherit (lib.meta) getExe;
@@ -14,16 +15,18 @@
 
   cfg = config.vim.languages.yaml;
 
-  onAttach =
-    if config.vim.languages.helm.lsp.enable
+  on_attach = mkLuaInline (
+    if config.vim.languages.helm.lsp.enable && config.vim.languages.helm.enable
     then ''
-      on_attach = function(client, bufnr)
+      function(client, bufnr)
+        default_on_attach()
         local filetype = vim.bo[bufnr].filetype
         if filetype == "helm" then
           client.stop()
         end
       end''
-    else "on_attach = default_on_attach";
+    else "default_on_attach"
+  );
 
   defaultServers = ["yaml-language-server"];
   servers = {
@@ -32,7 +35,7 @@
       cmd = [(getExe pkgs.yaml-language-server) "--stdio"];
       filetypes = ["yaml" "yaml.docker-compose" "yaml.gitlab" "yaml.helm-values"];
       root_markers = [".git"];
-      on_attach = onAttach;
+      inherit on_attach;
       # -- https://github.com/redhat-developer/vscode-redhat-telemetry#how-to-disable-telemetry-reporting
       settings = {
         redhat = {