refactor(java): move defaults to opts

lua/lazyvim/plugins/extras/lang/java.lua

@@ -64,6 +64,49 @@ return {
     "mfussenegger/nvim-jdtls",
     dependencies = { "folke/which-key.nvim" },
     ft = java_filetypes,
+    opts = function()
+      return {
+        -- How to find the root dir for a given filename. The default comes from
+        -- lspconfig which provides a function specifically for java projects.
+        root_dir = require("lspconfig.server_configurations.jdtls").default_config.root_dir,
+
+        -- How to find the project name for a given root dir.
+        project_name = function(root_dir)
+          return root_dir and vim.fs.basename(root_dir)
+        end,
+
+        -- Where are the config and workspace dirs for a project?
+        jdtls_config_dir = function(project_name)
+          return vim.fn.stdpath("cache") .. "/jdtls/" .. project_name .. "/config"
+        end,
+        jdtls_workspace_dir = function(project_name)
+          return vim.fn.stdpath("cache") .. "/jdtls/" .. project_name .. "/workspace"
+        end,
+
+        -- How to run jdtls. This can be overridden to a full java command-line
+        -- if the Python wrapper script doesn't suffice.
+        cmd = { "jdtls" },
+        full_cmd = function(opts)
+          local fname = vim.api.nvim_buf_get_name(0)
+          local root_dir = opts.root_dir(fname)
+          local project_name = opts.project_name(root_dir)
+          local cmd = vim.deepcopy(opts.cmd)
+          if project_name then
+            vim.list_extend(cmd, {
+              "-configuration",
+              opts.jdtls_config_dir(project_name),
+              "-data",
+              opts.jdtls_workspace_dir(project_name),
+            })
+          end
+          return cmd
+        end,
+
+        -- These depend on nvim-dap, but can additionally be disabled by setting false here.
+        dap = { hotcodereplace = "auto", config_overrides = {} },
+        test = true,
+      }
+    end,
     config = function()
       local opts = Util.opts("nvim-jdtls") or {}
 
@@ -71,14 +114,14 @@ return {
       -- if nvim-dap is enabled with java debug/test.
       local mason_registry = require("mason-registry")
       local bundles = {} ---@type string[]
-      if opts.dap ~= false and Util.has("nvim-dap") and mason_registry.is_installed("java-debug-adapter") then
+      if opts.dap and Util.has("nvim-dap") and mason_registry.is_installed("java-debug-adapter") then
         local java_dbg_pkg = mason_registry.get_package("java-debug-adapter")
         local java_dbg_path = java_dbg_pkg:get_install_path()
         local jar_patterns = {
           java_dbg_path .. "/extension/server/com.microsoft.java.debug.plugin-*.jar",
         }
         -- java-test also depends on java-debug-adapter.
-        if opts.test ~= false and mason_registry.is_installed("java-test") then
+        if opts.test and mason_registry.is_installed("java-test") then
           local java_test_pkg = mason_registry.get_package("java-test")
           local java_test_path = java_test_pkg:get_install_path()
           vim.list_extend(jar_patterns, {
@@ -93,38 +136,21 @@ return {
       end
 
       local function attach_jdtls()
-        -- The configuration for jdtls contains a useful function to find the java
-        -- project root. This can be overridden by opts.root_dir
-        local find_java_project_root = opts.root_dir
-          or require("lspconfig.server_configurations.jdtls").default_config.root_dir
         local fname = vim.api.nvim_buf_get_name(0)
-        local root_dir = find_java_project_root(fname)
-        local project_name = root_dir and vim.fs.basename(root_dir)
-        local cmd = { "jdtls" }
 
-        if project_name then
-          local jdtls_cache_dir = vim.fn.stdpath("cache") .. "/jdtls/" .. project_name
-          vim.list_extend(cmd, {
-            "-configuration",
-            jdtls_cache_dir .. "/config",
-            "-data",
-            jdtls_cache_dir .. "/workspace",
-          })
-        end
-
-        -- Base configuration can be augmented and overridden by opts.jdtls
-        local base_config = {
-          cmd = cmd,
-          root_dir = root_dir,
+        -- Configuration can be augmented and overridden by opts.jdtls
+        local config = extend_or_override({
+          cmd = opts.full_cmd(opts),
+          root_dir = opts.root_dir(fname),
           init_options = {
             bundles = bundles,
           },
           -- enable CMP capabilities
           capabilities = require("cmp_nvim_lsp").default_capabilities(),
-        }
+        }, opts.jdtls)
 
         -- Existing server will be reused if the root_dir matches.
-        require("jdtls").start_or_attach(extend_or_override(base_config, opts.jdtls))
+        require("jdtls").start_or_attach(config)
         -- not need to require("jdtls.setup").add_commands(), start automatically adds commands
       end
 
@@ -169,15 +195,13 @@ return {
               },
             }, { mode = "v", buffer = args.buf })
 
-            if opts.dap ~= false and Util.has("nvim-dap") and mason_registry.is_installed("java-debug-adapter") then
+            if opts.dap and Util.has("nvim-dap") and mason_registry.is_installed("java-debug-adapter") then
               -- custom init for Java debugger
-              require("jdtls").setup_dap(
-                extend_or_override({ hotcodereplace = "auto", config_overrides = {} }, opts.dap)
-              )
+              require("jdtls").setup_dap(opts.dap)
               require("jdtls.dap").setup_dap_main_class_configs()
 
               -- Java Test require Java debugger to work
-              if opts.test ~= false and mason_registry.is_installed("java-test") then
+              if opts.test and mason_registry.is_installed("java-test") then
                 -- custom keymaps for Java test runner (not yet compatible with neotest)
                 wk.register({
                   ["<leader>t"] = { name = "+test" },