add metals

lua/plugins/nvim-metals.lua

@@ -0,0 +1,27 @@
+return {
+  "scalameta/nvim-metals",
+  keys = {
+    { "<leader>ws", "<cmd>lua require'metals'.hover_worksheet()<cr>", desc = "Metals Worksheet" },
+  },
+  config = function()
+    local metals_config = require("metals").bare_config()
+
+    metals_config.settings = {
+      showImplicitArguments = true,
+      excludedPackages = { "akka.actor.typed.javadsl", "com.github.swagger.akka.javadsl" },
+    }
+
+    metals_config.init_options.statusBarProvider = "on"
+
+    metals_config.capabilities = require("cmp_nvim_lsp").default_capabilities()
+
+    local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
+    vim.api.nvim_create_autocmd("FileType", {
+      pattern = { "scala", "sbt", "java" },
+      callback = function()
+        require("metals").initialize_or_attach(metals_config)
+      end,
+      group = nvim_metals_group,
+    })
+  end,
+}