From 36585be18c6a4348f6e0a0529e1ef16ec38e8152 Mon Sep 17 00:00:00 2001
From: Jannik Donker <me@jannikdonker.de>
Date: Sun, 2 Nov 2025 20:37:33 +0100
Subject: [PATCH] added better jdtls config

---
 init.lua            | 96 +++++++++++++++++++++++++++++++++++++++++++--
 nvim-pack-lock.json |  4 ++
 2 files changed, 97 insertions(+), 3 deletions(-)

diff --git a/init.lua b/init.lua
index a67d632..fe12293 100644
--- a/init.lua
+++ b/init.lua
@@ -63,8 +63,9 @@ require("autoclose").setup()
 
 -- LSP START --
 
-vim.lsp.enable({ "lua_ls", "ts_ls", "svelte", "tailwindcss", "cssls", "bashls", "rust_analyzer", "clangd", "clang-format", "taplo",
-    "sourcekit", "lemminx", "tinymist", "jdtls", "jsonls" })
+vim.lsp.enable({ "lua_ls", "ts_ls", "svelte", "tailwindcss", "cssls", "bashls", "rust_analyzer", "clangd", "clang-format",
+    "taplo",
+    "sourcekit", "lemminx", "tinymist", "jsonls" })
 
 vim.lsp.config["tinymist"] = {
     cmd = { "tinymist" },
@@ -78,11 +79,100 @@ vim.lsp.config("jdtls", {
     root_dir = vim.fn.getcwd(),
     settings = {
         java = {
-            -- Custom eclipse.jdt.ls options go here
         },
     },
 })
 
+vim.api.nvim_create_autocmd('FileType', {
+    pattern = 'java',
+    callback = function(args)
+        local project_name = vim.fn.fnamemodify(vim.fn.getcwd(), ":p:h:t")
+        local workspace_dir = vim.fn.stdpath("data") ..
+        package.config:sub(1, 1) .. "jdtls-workspace" .. package.config:sub(1, 1) .. project_name
+        local os_name = vim.loop.os_uname().sysname
+        local config = {
+            -- The command that starts the language server
+            -- See: https://github.com/eclipse/eclipse.jdt.ls#running-from-the-command-line
+            cmd = {
+
+                -- 💀
+                "java", -- or '/path/to/java17_or_newer/bin/java'
+                -- depends on if `java` is in your $PATH env variable and if it points to the right version.
+
+                "-Declipse.application=org.eclipse.jdt.ls.core.id1",
+                "-Dosgi.bundles.defaultStartLevel=4",
+                "-Declipse.product=org.eclipse.jdt.ls.core.product",
+                "-Dlog.protocol=true",
+                "-Dlog.level=ALL",
+                "-Xmx1g",
+                "--add-modules=ALL-SYSTEM",
+                "--add-opens",
+                "java.base/java.util=ALL-UNNAMED",
+                "--add-opens",
+                "java.base/java.lang=ALL-UNNAMED",
+
+                -- 💀
+                "-jar",
+                vim.fn.stdpath("data") ..
+                package.config:sub(1, 1) ..
+                "mason" ..
+                package.config:sub(1, 1) ..
+                "packages" ..
+                package.config:sub(1, 1) ..
+                "jdtls" ..
+                package.config:sub(1, 1) ..
+                "plugins" .. package.config:sub(1, 1) .. "org.eclipse.equinox.launcher_1.7.100.v20251014-1222.jar",
+                -- Must point to the                                                     Change this to
+                -- eclipse.jdt.ls installation                                           the actual version
+
+                -- 💀
+                "-configuration",
+                vim.fn.stdpath("data") ..
+                package.config:sub(1, 1) ..
+                "mason" ..
+                package.config:sub(1, 1) ..
+                "packages" ..
+                package.config:sub(1, 1) ..
+                "jdtls" ..
+                package.config:sub(1, 1) ..
+                "config_" .. (os_name == "Windows_NT" and "win" or os_name == "Linux" and "linux" or "mac"),
+                -- eclipse.jdt.ls installation            Depending on your system.
+
+                -- 💀
+                -- See `data directory configuration` section in the README
+                "-data",
+                workspace_dir,
+            },
+
+            -- 💀
+            -- This is the default if not provided, you can remove it. Or adjust as needed.
+            -- One dedicated LSP server & client will be started per unique root_dir
+            root_dir = require("jdtls.setup").find_root({ ".git", "mvnw", "gradlew" }),
+
+            -- Here you can configure eclipse.jdt.ls specific settings
+            -- See https://github.com/eclipse/eclipse.jdt.ls/wiki/Running-the-JAVA-LS-server-from-the-command-line#initialize-request
+            -- for a list of options
+            settings = {
+                java = {},
+            },
+
+            -- Language server `initializationOptions`
+            -- You need to extend the `bundles` with paths to jar files
+            -- if you want to use additional eclipse.jdt.ls plugins.
+            --
+            -- See https://github.com/mfussenegger/nvim-jdtls#java-debug-installation
+            --
+            -- If you don't plan on using the debugger or other eclipse.jdt.ls plugins you can remove this
+            init_options = {
+                bundles = {},
+            },
+        }
+        -- This starts a new client & server,
+        -- or attaches to an existing client & server depending on the `root_dir`.
+        require("jdtls").start_or_attach(config)
+    end
+})
+
 -- LSP END --
 
 -- KEYMAP START --
diff --git a/nvim-pack-lock.json b/nvim-pack-lock.json
index df079f0..8dea1b1 100644
--- a/nvim-pack-lock.json
+++ b/nvim-pack-lock.json
@@ -1,5 +1,9 @@
 {
   "plugins": {
+    "autoclose.nvim": {
+      "rev": "3f86702",
+      "src": "https://github.com/m4xshen/autoclose.nvim"
+    },
     "blink.cmp": {
       "version": "'v1.6.0'"
     },