Check lsp client is active for all language files (#790)

ftplugin/lua.lua

@@ -1,34 +1,37 @@
--- https://github.com/sumneko/lua-language-server/wiki/Build-and-Run-(Standalone)
-local sumneko_root_path = DATA_PATH .. "/lspinstall/lua"
-local sumneko_binary = sumneko_root_path .. "/sumneko-lua-language-server"
+if not require("lv-utils").check_lsp_client_active "sumneko_lua" then
+  -- https://github.com/sumneko/lua-language-server/wiki/Build-and-Run-(Standalone)
+  local sumneko_root_path = DATA_PATH .. "/lspinstall/lua"
+  local sumneko_binary = sumneko_root_path .. "/sumneko-lua-language-server"
 
-require("lspconfig").sumneko_lua.setup {
-  cmd = { sumneko_binary, "-E", sumneko_root_path .. "/main.lua" },
-  on_attach = require("lsp").common_on_attach,
-  settings = {
-    Lua = {
-      runtime = {
-        -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
-        version = "LuaJIT",
-        -- Setup your lua path
-        path = vim.split(package.path, ";"),
-      },
-      diagnostics = {
-        -- Get the language server to recognize the `vim` global
-        globals = { "vim" },
-      },
-      workspace = {
-        -- Make the server aware of Neovim runtime files
-        library = {
-          [vim.fn.expand "$VIMRUNTIME/lua"] = true,
-          [vim.fn.expand "$VIMRUNTIME/lua/vim/lsp"] = true,
+  require("lspconfig").sumneko_lua.setup {
+    cmd = { sumneko_binary, "-E", sumneko_root_path .. "/main.lua" },
+    on_attach = require("lsp").common_on_attach,
+    settings = {
+      Lua = {
+        runtime = {
+          -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
+          version = "LuaJIT",
+          -- Setup your lua path
+          path = vim.split(package.path, ";"),
+        },
+        diagnostics = {
+          -- Get the language server to recognize the `vim` global
+          globals = { "vim" },
+        },
+        workspace = {
+          -- Make the server aware of Neovim runtime files
+          library = {
+            [vim.fn.expand "$VIMRUNTIME/lua"] = true,
+            [vim.fn.expand "$VIMRUNTIME/lua/vim/lsp"] = true,
+          },
+          maxPreload = 100000,
+          preloadFileSize = 1000,
         },
-        maxPreload = 100000,
-        preloadFileSize = 1000,
       },
     },
-  },
-}
+  }
+end
+
 if O.lang.lua.autoformat then
   require("lv-utils").define_augroups {
     _lua_autoformat = {