refactor!: let jdtls wrapper script handle launching the server (#20)

Author: s1n7ax

lua/java-core/ls/servers/jdtls/config.lua

@@ -0,0 +1,37 @@
+local M = {}
+
+function M.get_config()
+	return {
+		init_options = {
+			extendedClientCapabilities = {
+				classFileContentsSupport = true,
+				generateToStringPromptSupport = true,
+				hashCodeEqualsPromptSupport = true,
+				advancedExtractRefactoringSupport = true,
+				advancedOrganizeImportsSupport = true,
+				generateConstructorsPromptSupport = true,
+				generateDelegateMethodsPromptSupport = true,
+				moveRefactoringSupport = true,
+				overrideMethodsPromptSupport = true,
+				executeClientCommandSupport = true,
+				inferSelectionSupport = {
+					'extractMethod',
+					'extractVariable',
+					'extractConstant',
+					'extractVariableAllOccurrence',
+				},
+			},
+		},
+
+		handlers = {
+			--@TODO
+			--overriding '$/progress' is necessary because by default it's using the
+			--lspconfig progress handler which prints the wrong value in the latest
+			--jdtls version (tested on 1.29.0).
+			--https://github.com/neovim/nvim-lspconfig/issues/2897
+			['$/progress'] = vim.lsp.handlers['$/progress'],
+		},
+	}
+end
+
+return M

lua/java-core/ls/servers/jdtls/init.lua

@@ -0,0 +1,67 @@
+local util = require('lspconfig.util')
+local path = require('java-core.utils.path')
+local mason = require('java-core.utils.mason')
+local plugins = require('java-core.ls.servers.jdtls.plugins')
+local log = require('java-core.utils.log')
+local workspace = require('java-core.ls.servers.jdtls.workspace')
+local config = require('java-core.ls.servers.jdtls.config')
+
+local M = {}
+
+---@class JavaCoreGetConfigOptions
+---@field root_markers string[] list of files to find the root dir of a project
+---Ex:- { 'pom.xml', 'build.gradle', '.git' }
+---@field jdtls_plugins string[] list of jdtls plugins to load on start up
+---Ex:- { 'java-test', 'java-debug-adapter' }
+
+---Returns a configuration for jdtls that you can pass into the setup of nvim-lspconfig
+---@param opts JavaCoreGetConfigOptions
+---@return LSPSetupConfig # jdtls setup configuration
+function M.get_config(opts)
+	log.debug('generating jdtls config')
+
+	local jdtls_path = mason.get_pkg_path('jdtls')
+	local lombok_path = path.join(jdtls_path, 'lombok.jar')
+	local jdtls_cache_path = path.join(vim.fn.stdpath('cache'), 'jdtls')
+	local plugin_paths =
+		plugins.get_plugin_paths({ 'java-test', 'java-debug-adapter' })
+
+	local base_config = config.get_config()
+
+	base_config.cmd = {
+		'jdtls',
+		'-configuration',
+		jdtls_cache_path,
+		'-data',
+		workspace.get_default_workspace(),
+		'-javaagent:' .. lombok_path,
+	}
+
+	base_config.root_dir = M.get_root_finder(opts.root_markers)
+	base_config.init_options.bundles = plugin_paths
+	base_config.init_options.workspace = workspace.get_default_workspace()
+
+	log.debug('generated jdtls setup config: ', base_config)
+
+	return base_config
+end
+
+---Returns a function that finds the java project root
+---@private
+---@param root_markers string[] list of files to find the root dir of a project
+---@return function
+function M.get_root_finder(root_markers)
+	return function(file_name)
+		log.info('finding the root_dir')
+		log.debug('root_markers: ', root_markers)
+
+		local root = util.root_pattern(unpack(root_markers))(file_name)
+
+		if root then
+			log.fmt_debug('root of: %s is: %s', file_name, root)
+			return root
+		end
+	end
+end
+
+return M

lua/java-core/ls/servers/jdtls/plugins.lua

@@ -0,0 +1,32 @@
+local mason = require('java-core.utils.mason')
+local path = require('java-core.utils.path')
+local file = require('java-core.utils.file')
+
+local List = require('java-core.utils.list')
+
+local M = {}
+
+local plugin_to_jar_path_map = {
+	['java-test'] = '*.jar',
+	['java-debug-adapter'] = '*.jar',
+}
+
+---Returns a list of .jar file paths for given list of jdtls plugins
+---@param plugins string[]
+---@return string[] # list of .jar file paths
+function M.get_plugin_paths(plugins)
+	local plugin_paths = List:new()
+
+	for _, plugin in ipairs(plugins) do
+		local relative_path = plugin_to_jar_path_map[plugin]
+		local plugin_shared_path = mason.get_shared_path(plugin)
+		local full_path = path.join(plugin_shared_path, relative_path)
+		local resolved_paths = file.get_file_list(full_path)
+
+		plugin_paths:push(resolved_paths)
+	end
+
+	return plugin_paths:flatten()
+end
+
+return M

lua/java-core/workspace.lua renamed to lua/java-core/ls/servers/jdtls/workspace.lua

@@ -0,0 +1,10 @@
+local M = {}
+
+---Join a given list of paths to one path
+---@param ... string paths to join
+---@return string # joined path
+function M.join(...)
+	return table.concat({ ... }, '/')
+end
+
+return M