nvim: Support build.mill files

modules/editor/vim/lua/plugins/lsp.lua

@@ -1,4 +1,15 @@
 return {
+  recommended = function()
+    return LazyVim.extras.wants({
+      ft = "scala",
+      root = { "build.sbt", "build.mill", "build.sc", "build.gradle", "pom.xml" },
+    })
+  end,
+  {
+    "scalameta/nvim-metals",
+    ft = { "scala", "sbt", "mill" },
+    config = function() end,
+  },
   {
     "neovim/nvim-lspconfig",
     opts = {
@@ -12,6 +23,23 @@ return {
           cmd = { "elixir-ls" },
         },
       },
+      setup = {
+        metals = function(_, opts)
+          local metals = require("metals")
+          local metals_config = vim.tbl_deep_extend("force", metals.bare_config(), opts)
+          metals_config.on_attach = LazyVim.has("nvim-dap") and metals.setup_dap or nil
+
+          local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
+          vim.api.nvim_create_autocmd("FileType", {
+            pattern = { "scala", "sbt", "mill" },
+            callback = function()
+              metals.initialize_or_attach(metals_config)
+            end,
+            group = nvim_metals_group,
+          })
+          return true
+        end,
+      },
     },
   },
 }