1 files changed, 102 insertions, 0 deletions
diff --git a/.config/nvim/lsp/jdtls.lua b/.config/nvim/lsp/jdtls.lua
new file mode 100644
index 0000000..4026047
--- /dev/null
+++ b/.config/nvim/lsp/jdtls.lua
@@ -0,0 +1,102 @@
+---@brief
+---
+--- https://projects.eclipse.org/projects/eclipse.jdt.ls
+---
+--- Language server for Java.
+---
+--- IMPORTANT: If you want all the features jdtls has to offer, [nvim-jdtls](https://github.com/mfussenegger/nvim-jdtls)
+--- is highly recommended. If all you need is diagnostics, completion, imports, gotos and formatting and some code actions
+--- you can keep reading here.
+---
+--- For manual installation you can download precompiled binaries from the
+--- [official downloads site](http://download.eclipse.org/jdtls/snapshots/?d)
+--- and ensure that the `PATH` variable contains the `bin` directory of the extracted archive.
+---
+--- ```lua
+---   -- init.lua
+---   vim.lsp.enable('jdtls')
+--- ```
+---
+--- You can also pass extra custom jvm arguments with the JDTLS_JVM_ARGS environment variable as a space separated list of arguments,
+--- that will be converted to multiple --jvm-arg=<param> args when passed to the jdtls script. This will allow for example tweaking
+--- the jvm arguments or integration with external tools like lombok:
+---
+--- ```sh
+--- export JDTLS_JVM_ARGS="-javaagent:$HOME/.local/share/java/lombok.jar"
+--- ```
+---
+--- For automatic installation you can use the following unofficial installers/launchers under your own risk:
+---   - [jdtls-launcher](https://github.com/eruizc-dev/jdtls-launcher) (Includes lombok support by default)
+---     ```lua
+---       -- init.lua
+---       vim.lsp.config('jdtls', { cmd = { 'jdtls' } })
+---     ```
+
+local function get_jdtls_cache_dir()
+  return vim.fn.stdpath('cache') .. '/jdtls'
+end
+
+local function get_jdtls_workspace_dir()
+  return get_jdtls_cache_dir() .. '/workspace'
+end
+
+local function get_jdtls_jvm_args()
+  local env = os.getenv('JDTLS_JVM_ARGS')
+  local args = {}
+  for a in string.gmatch((env or ''), '%S+') do
+    local arg = string.format('--jvm-arg=%s', a)
+    table.insert(args, arg)
+  end
+  return unpack(args)
+end
+
+local root_markers1 = {
+  -- Multi-module projects
+  'mvnw',
+  'gradlew',
+  'build.gradle',
+  'build.gradle.kts',
+  -- Use git directory as last resort for multi-module maven projects
+  -- In multi-module maven projects it is not really possible to determine what is the parent directory
+  -- and what is submodule directory. And jdtls does not break if the parent directory is at higher level than
+  -- actual parent pom.xml so propagating all the way to root git directory is fine
+  '.git',
+}
+local root_markers2 = {
+  -- Single-module projects
+  'build.xml', -- Ant
+  'pom.xml', -- Maven
+  'settings.gradle', -- Gradle
+  'settings.gradle.kts', -- Gradle
+}
+
+---@type vim.lsp.Config
+return {
+  ---@param dispatchers? vim.lsp.rpc.Dispatchers
+  ---@param config vim.lsp.ClientConfig
+  cmd = function(dispatchers, config)
+    local workspace_dir = get_jdtls_workspace_dir()
+    local data_dir = workspace_dir
+
+    if config.root_dir then
+      data_dir = data_dir .. '/' .. vim.fn.fnamemodify(config.root_dir, ':p:h:t')
+    end
+
+    local config_cmd = {
+      'jdtls',
+      '-data',
+      data_dir,
+      get_jdtls_jvm_args(),
+    }
+
+    return vim.lsp.rpc.start(config_cmd, dispatchers, {
+      cwd = config.cmd_cwd,
+      env = config.cmd_env,
+      detached = config.detached,
+    })
+  end,
+  filetypes = { 'java' },
+  root_markers = vim.fn.has('nvim-0.11.3') == 1 and { root_markers1, root_markers2 }
+    or vim.list_extend(root_markers1, root_markers2),
+  init_options = {},
+}