Handle mason.nvim install deps not existing

lua/plugins/completions.lua

@@ -33,28 +33,41 @@ return {
 
   config = function()
     require('mason').setup()
-    require('mason-lspconfig').setup({
+    local ensure_installed = {
-      automatic_installation = false,
+      -- Language servers
-      ensure_installed = {
+      'clangd',                          -- C/C++
+      'cmake',                           -- CMake
+      'lua_ls',                          -- Lua
+      'opencl_ls',                       -- OpenCL
+    }
+    if vim.fn.executable('npm') == 1 then
+      local npm_ensure_installed = {
         -- Language servers
         'ansiblels',                       -- Ansible
         'bashls',                          -- Bash
-        'clangd',                          -- C/C++
-        'cmake',                           -- CMake
         'docker_compose_language_service', -- Docker Compose
         'dockerls',                        -- Dockerfile
-        'esbonio',                         -- Sphinx
         'html',                            -- HTML
         'jsonls',                          -- JSON
-        'lemminx',                         -- XML
-        'lua_ls',                          -- Lua
-        'opencl_ls',                       -- OpenCL
-        'powershell_es',                   -- Powershell
-        'pyright',                         -- Python
-        'ruff_lsp',                        -- Python
         'vimls',                           -- VimScript
         'yamlls',                          -- YAML
-      },
+      }
+      for _, package in ipairs(npm_ensure_installed) do
+        table.insert(ensure_installed, package)
+      end
+    end
+    -- TODO: Where to put these?
+    -- Language servers
+    -- 'esbonio',                         -- Sphinx
+    -- 'pyright',                         -- Python
+    -- 'ruff_lsp',                        -- Python
+    -- 'lemminx',                         -- XML
+    if vim.fn.has('win32') then
+      table.insert(ensure_installed, 'powershell_es')
+    end
+    require('mason-lspconfig').setup({
+      automatic_installation = false,
+      ensure_installed = ensure_installed,
 
       handlers = {
         -- Default handler, sets up everything unless a custom language server