feat: expose configs

1 files changed, 203 insertions, 0 deletions

diff --git a/lua/lspconfig/server_configurations/jdtls.lua b/lua/lspconfig/server_configurations/jdtls.lua
new file mode 100644
index 00000000..353b1d42
--- /dev/null
+++ b/lua/lspconfig/server_configurations/jdtls.lua
@@ -0,0 +1,203 @@
+local util = require 'lspconfig/util'
+local handlers = require 'vim.lsp.handlers'
+
+local sysname = vim.loop.os_uname().sysname
+local env = {
+  HOME = vim.loop.os_homedir(),
+  JAVA_HOME = os.getenv 'JAVA_HOME',
+  JDTLS_HOME = os.getenv 'JDTLS_HOME',
+  WORKSPACE = os.getenv 'WORKSPACE',
+}
+
+local function get_java_executable()
+  local executable = env.JAVA_HOME and util.path.join(env.JAVA_HOME, 'bin', 'java') or 'java'
+
+  return sysname:match 'Windows' and executable .. '.exe' or executable
+end
+
+local function get_workspace_dir()
+  return env.WORKSPACE and env.WORKSPACE or util.path.join(env.HOME, 'workspace')
+end
+
+local function get_jdtls_jar()
+  return vim.fn.expand '$JDTLS_HOME/plugins/org.eclipse.equinox.launcher_*.jar'
+end
+
+local function get_jdtls_config()
+  if sysname:match 'Linux' then
+    return util.path.join(env.JDTLS_HOME, 'config_linux')
+  elseif sysname:match 'Darwin' then
+    return util.path.join(env.JDTLS_HOME, 'config_mac')
+  elseif sysname:match 'Windows' then
+    return util.path.join(env.JDTLS_HOME, 'config_win')
+  else
+    return util.path.join(env.JDTLS_HOME, 'config_linux')
+  end
+end
+
+-- TextDocument version is reported as 0, override with nil so that
+-- the client doesn't think the document is newer and refuses to update
+-- See: https://github.com/eclipse/eclipse.jdt.ls/issues/1695
+local function fix_zero_version(workspace_edit)
+  if workspace_edit and workspace_edit.documentChanges then
+    for _, change in pairs(workspace_edit.documentChanges) do
+      local text_document = change.textDocument
+      if text_document and text_document.version and text_document.version == 0 then
+        text_document.version = nil
+      end
+    end
+  end
+  return workspace_edit
+end
+
+-- Compatibility shim added for breaking changes to the lsp handler signature in nvim-0.5.1
+local function remap_arguments(err, result, ctx)
+  if vim.fn.has 'nvim-0.5.1' == 1 then
+    handlers[ctx.method](err, result, ctx)
+  else
+    handlers[ctx.method](err, ctx.method, result)
+  end
+end
+
+local function on_textdocument_codeaction(err, actions, ctx)
+  for _, action in ipairs(actions) do
+    -- TODO: (steelsojka) Handle more than one edit?
+    if action.command == 'java.apply.workspaceEdit' then -- 'action' is Command in java format
+      action.edit = fix_zero_version(action.edit or action.arguments[1])
+    elseif type(action.command) == 'table' and action.command.command == 'java.apply.workspaceEdit' then -- 'action' is CodeAction in java format
+      action.edit = fix_zero_version(action.edit or action.command.arguments[1])
+    end
+  end
+
+  remap_arguments(err, actions, ctx)
+end
+
+local function on_textdocument_rename(err, workspace_edit, ctx)
+  remap_arguments(err, fix_zero_version(workspace_edit), ctx)
+end
+
+local function on_workspace_applyedit(err, workspace_edit, ctx)
+  remap_arguments(err, fix_zero_version(workspace_edit), ctx)
+end
+
+-- Non-standard notification that can be used to display progress
+local function on_language_status(_, result)
+  local command = vim.api.nvim_command
+  command 'echohl ModeMsg'
+  command(string.format('echo "%s"', result.message))
+  command 'echohl None'
+end
+
+local root_files = {
+  -- Single-module projects
+  {
+    'build.xml', -- Ant
+    'pom.xml', -- Maven
+    'settings.gradle', -- Gradle
+    'settings.gradle.kts', -- Gradle
+  },
+  -- Multi-module projects
+  { 'build.gradle', 'build.gradle.kts' },
+}
+
+return {
+  default_config = {
+    cmd = {
+      get_java_executable(),
+      '-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',
+      '-Xms1g',
+      '-Xmx2G',
+      '--add-modules=ALL-SYSTEM',
+      '--add-opens',
+      'java.base/java.util=ALL-UNNAMED',
+      '--add-opens',
+      'java.base/java.lang=ALL-UNNAMED',
+      '-jar',
+      get_jdtls_jar(),
+      '-configuration',
+      get_jdtls_config(),
+      '-data',
+      get_workspace_dir(),
+    },
+    filetypes = { 'java' },
+    root_dir = function(fname)
+      for _, patterns in ipairs(root_files) do
+        local root = util.root_pattern(unpack(patterns))(fname)
+        if root then
+          return root
+        end
+      end
+    end,
+    single_file_mode = true,
+    init_options = {
+      workspace = get_workspace_dir(),
+      jvm_args = {},
+      os_config = nil,
+    },
+    handlers = {
+      -- Due to an invalid protocol implementation in the jdtls we have to conform these to be spec compliant.
+      -- https://github.com/eclipse/eclipse.jdt.ls/issues/376
+      ['textDocument/codeAction'] = util.compat_handler(on_textdocument_codeaction),
+      ['textDocument/rename'] = util.compat_handler(on_textdocument_rename),
+      ['workspace/applyEdit'] = util.compat_handler(on_workspace_applyedit),
+      ['language/status'] = util.compat_handler(vim.schedule_wrap(on_language_status)),
+    },
+  },
+  docs = {
+    package_json = 'https://raw.githubusercontent.com/redhat-developer/vscode-java/master/package.json',
+    description = [[
+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)
+
+Due to the nature of java, settings cannot be inferred. Please set the following
+environmental variables to match your installation. If you need per-project configuration
+[direnv](https://github.com/direnv/direnv) is highly recommended.
+
+```bash
+# Mandatory:
+# .bashrc
+export JDTLS_HOME=/path/to/jdtls_root # Directory with the plugin and configs directories
+
+# Optional:
+export JAVA_HOME=/path/to/java_home # In case you don't have java in path or want to use a version in particular
+export WORKSPACE=/path/to/workspace # Defaults to $HOME/workspace
+```
+```lua
+  -- init.lua
+  require'lspconfig'.jdtls.setup{}
+```
+
+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
+      require'lspconfig'.jdtls.setup{ cmd = { 'jdtls' } }
+    ```
+    ]],
+    default_config = {
+      root_dir = [[{
+        -- Single-module projects
+        {
+          'build.xml', -- Ant
+          'pom.xml', -- Maven
+          'settings.gradle', -- Gradle
+          'settings.gradle.kts', -- Gradle
+        },
+        -- Multi-module projects
+        { 'build.gradle', 'build.gradle.kts' },
+      } or vim.fn.getcwd()]],
+    },
+  },
+}