put jdtls config in separate lua file

config/programs/vim/modules/languages/java.nix

@@ -3,62 +3,15 @@
   lib,
   ...
 }:
-with lib; {
+with builtins;
+with lib;
+let
+  jdtls-lua = replaceStrings ["@jdt-language-server@" "@openjdk@"] ["${pkgs.jdt-language-server}" "${pkgs.openjdk}" ] (readFile ../lua/jdtls.lua);
+in
+{
   output.config_file = ''
     lua << EOF
-    vim.api.nvim_create_autocmd({"FileType"}, {
+      ${jdtls-lua}
-      local jdtls = require('jdtls')
-      local root_markers = {'gradlew', '.git'}
-      local root_dir = require('jdtls.setup').find_root(root_markers)
-      local home = os.getenv('HOME')
-      local workspace_folder = home .. "/.cache/nvim/java/" .. vim.fn.fnamemodify(root_dir, ":p:h:t")
-      local config = {
-        cmd = {
-          '${pkgs.jdt-language-server}/bin/jdt-language-server',
-          '-data', workspace_folder
-        },
-        java = {
-          signatureHelp = { enabled = true },
-          contentProvider = { preferred = 'fernflower' },
-          codeGeneration = {
-            toString = {
-              template = "''${object.className}{''${member.name()}=''${member.value}, ''${otherMembers}}"
-            },
-            hashCodeEquals = {
-              useJava7Objects = true,
-            },
-            useBlocks = true,
-          },
-          configuration = {
-            runtimes = {
-              {
-                name = "JavaSE-17",
-                path = "${pkgs.openjdk}",
-              },
-            }
-          }
-        },
-        onAttach = function(client, bufnr)
-          require('me.lsp.conf').on_attach(client, bufnr, {
-            server_side_fuzzy_completion = true,
-          })
-
-          jdtls.setup_dap({hotcodereplace = 'auto'})
-          jdtls.setup.add_commands()
-          local opts = { silent = true, buffer = bufnr }
-          vim.keymap.set('n', "<A-o>", jdtls.organize_imports, opts)
-          vim.keymap.set('n', "<leader>df", jdtls.test_class, opts)
-          vim.keymap.set('n', "<leader>dn", jdtls.test_nearest_method, opts)
-          vim.keymap.set('n', "crv", jdtls.extract_variable, opts)
-          vim.keymap.set('v', 'crm', [[<ESC><CMD>lua require('jdtls').extract_method(true)<CR>]], opts)
-          vim.keymap.set('n', "crc", jdtls.extract_constant, opts)
-          local create_command = vim.api.nvim_buf_create_user_command
-          create_command(bufnr, 'W', require('me.lsp.ext').remove_unused_imports, {
-            nargs = 0,
-          })
-        end
-      }
-    })
     EOF
   '';
 }

config/programs/vim/modules/lua/jdtls.lua

@@ -0,0 +1,57 @@
+vim.api.nvim_create_autocmd({ "FileType" }, {
+	pattern = { "java" },
+	callback = function()
+		local jdtls = require("jdtls")
+		local root_markers = { "gradlew", ".git" }
+		local root_dir = require("jdtls.setup").find_root(root_markers)
+		local home = os.getenv("HOME")
+		local workspace_folder = home .. "/.cache/nvim/java/" .. vim.fn.fnamemodify(root_dir, ":p:h:t")
+		local config = {
+			cmd = {
+				"@jdt-language-server@/bin/jdt-language-server",
+				"-data",
+				workspace_folder,
+			},
+			java = {
+				signatureHelp = { enabled = true },
+				contentProvider = { preferred = "fernflower" },
+				codeGeneration = {
+					toString = {
+						template = "${object.className}{${member.name()}=${member.value}, ${otherMembers}}",
+					},
+					hashCodeEquals = {
+						useJava7Objects = true,
+					},
+					useBlocks = true,
+				},
+				configuration = {
+					runtimes = {
+						{
+							name = "JavaSE-17",
+							path = "@openjdk@",
+						},
+					},
+				},
+			},
+			onAttach = function(client, bufnr)
+				require("me.lsp.conf").on_attach(client, bufnr, {
+					server_side_fuzzy_completion = true,
+				})
+
+				jdtls.setup_dap({ hotcodereplace = "auto" })
+				jdtls.setup.add_commands()
+				local opts = { silent = true, buffer = bufnr }
+				vim.keymap.set("n", "<A-o>", jdtls.organize_imports, opts)
+				vim.keymap.set("n", "<leader>df", jdtls.test_class, opts)
+				vim.keymap.set("n", "<leader>dn", jdtls.test_nearest_method, opts)
+				vim.keymap.set("n", "crv", jdtls.extract_variable, opts)
+				vim.keymap.set("v", "crm", [[<ESC><CMD>lua require('jdtls').extract_method(true)<CR>]], opts)
+				vim.keymap.set("n", "crc", jdtls.extract_constant, opts)
+				local create_command = vim.api.nvim_buf_create_user_command
+				create_command(bufnr, "W", require("me.lsp.ext").remove_unused_imports, {
+					nargs = 0,
+				})
+			end,
+		}
+	end,
+})