1 files changed, 222 insertions, 0 deletions
diff --git a/lua/intellij_to_vscode/converter.lua b/lua/intellij_to_vscode/converter.lua
new file mode 100644
index 0000000..5d87cd8
--- /dev/null
+++ b/lua/intellij_to_vscode/converter.lua
@@ -0,0 +1,222 @@
+local M = {}
+local uv = vim.loop
+local api = vim.api
+
+local function read_file(path)
+	local fd = io.open(path, "r")
+	if not fd then
+		return nil
+	end
+	local content = fd:read("*a")
+	fd:close()
+	return content
+end
+
+local function write_file(path, content)
+	local dir = path:match("(.*/)[^/]+$")
+	if dir then
+		vim.fn.mkdir(dir, "p")
+	end
+	local fd = io.open(path, "w")
+	if not fd then
+		error("Cannot write " .. path)
+	end
+	fd:write(content)
+	fd:close()
+end
+
+-- Minimal XML attribute extractor for a tag like: <option name="MAIN_CLASS_NAME" value="com.example.Main" />
+local function extract_attributes(tag)
+	local attrs = {}
+	for k, v in tag:gmatch('(%w+)%s*=\\s*"([^"]*)"') do
+		attrs[k] = v
+	end
+	return attrs
+end
+
+-- Given the whole xml content, return table:
+-- { type = "Application", name = "MyApp", options = { [name] = value, ... }, env = {k=v}, method = {...} }
+local function parse_run_configuration(xml)
+	-- find <configuration ...> ... </configuration>
+	local cfg_tag, body = xml:match("<configuration%s+([^>]*)>(.-)</configuration>")
+	if not cfg_tag then
+		-- sometimes configuration is self-closing: <configuration ... />
+		cfg_tag = xml:match("<configuration%s+([^/>]+)/>")
+		body = ""
+	end
+	if not cfg_tag then
+		return nil
+	end
+
+	local cfg_attrs = extract_attributes(cfg_tag)
+	local result = { _attrs = cfg_attrs, options = {}, env = {}, method = {} }
+
+	-- options: <option name="..." value="..."/>
+	for option in body:gmatch("<option%s+([^>/]-)/>") do
+		local a = extract_attributes(option)
+		if a.name and a.value then
+			result.options[a.name] = a.value
+		end
+	end
+
+	-- envs: <envs><env name="K" value="V"/></envs>
+	local envs_block = body:match("<envs>(.-)</envs>")
+	if envs_block then
+		for envtag in envs_block:gmatch("<env%s+([^>/]-)/>") do
+			local a = extract_attributes(envtag)
+			if a.name and a.value then
+				result.env[a.name] = a.value
+			end
+		end
+	end
+
+	-- method (for JUnit): <method v="2"> <option name="..." value="..."/> </method>
+	local method_block = body:match("<method%s+([^>]*)>(.-)</method>")
+	if method_block then
+		local method_tag, method_body = body:match("<method%s+([^>]*)>(.-)</method>")
+		if method_tag then
+			result.method._attrs = extract_attributes(method_tag)
+			result.method.options = {}
+			for opt in method_body:gmatch("<option%s+([^>/]-)/>") do
+				local a = extract_attributes(opt)
+				if a.name and a.value then
+					result.method.options[a.name] = a.value
+				end
+			end
+		end
+	end
+
+	return result
+end
+
+-- Map a single parsed config to a VSCode launch configuration (as Lua table)
+local function map_to_vscode(name, parsed)
+	local t = parsed._attrs.type or parsed._attrs.factoryName or ""
+	local vscode = {
+		name = name or parsed._attrs.name or "Converted",
+		request = "launch",
+	}
+
+	-- Common Application type
+	if t:match("[Aa]pplication") or parsed.options.MAIN_CLASS_NAME then
+		vscode.type = "java"
+		vscode.mainClass = parsed.options.MAIN_CLASS_NAME or parsed.options.MAIN_CLASS
+		if parsed.options.PROGRAM_PARAMETERS and parsed.options.PROGRAM_PARAMETERS ~= "" then
+			-- split by space respecting simple quotes (basic)
+			local args = {}
+			for a in parsed.options.PROGRAM_PARAMETERS:gmatch("%S+") do
+				table.insert(args, a)
+			end
+			vscode.args = args
+		end
+		if parsed.options.VM_PARAMETERS and parsed.options.VM_PARAMETERS ~= "" then
+			vscode.vmArgs = parsed.options.VM_PARAMETERS
+		end
+		if parsed.options.WORKING_DIRECTORY and parsed.options.WORKING_DIRECTORY ~= "" then
+			vscode.cwd = parsed.options.WORKING_DIRECTORY:gsub("%$PROJECT_DIR%$", "${workspaceFolder}")
+		else
+			vscode.cwd = "${workspaceFolder}"
+		end
+		if next(parsed.env) then
+			vscode.env = parsed.env
+		end
+		-- If module present, attach projectName (useful for java extension)
+		if parsed.options.MODULE_NAME then
+			vscode.projectName = parsed.options.MODULE_NAME
+		end
+
+		return vscode
+	end
+
+	-- JUnit test configuration
+	if
+		t:match("[Jj]Unit")
+		or parsed.method.options and (parsed.method.options.CLASS_NAME or parsed.method.options.METHOD_NAME)
+	then
+		vscode.type = "java"
+		-- Use test runner config via mainClass (JUnit runner) or use builtin test adapters
+		if parsed.method.options.CLASS_NAME then
+			vscode.name = (parsed._attrs.name or "JUnit:") .. " " .. parsed.method.options.CLASS_NAME
+			-- map to a launch that runs the single test class
+			vscode.mainClass = parsed.method.options.CLASS_NAME
+			vscode.args = {}
+		end
+		if next(parsed.env) then
+			vscode.env = parsed.env
+		end
+		vscode.cwd = parsed.options.WORKING_DIRECTORY
+				and parsed.options.WORKING_DIRECTORY:gsub("%$PROJECT_DIR%$", "${workspaceFolder}")
+			or "${workspaceFolder}"
+		return vscode
+	end
+
+	-- Gradle run config
+	if t:match("[Gg]radle") or parsed._attrs.type == "Gradle" or parsed.options.TASK_NAME then
+		-- Represent as a 'command' launch using terminal.integrated (fallback)
+		vscode.type = "pwa-node" -- generic terminal-ish; user may change
+		vscode.name = parsed._attrs.name or "Gradle Task"
+		local task = parsed.options.TASK_NAME or parsed.options.GRADLE_TASK
+		vscode.request = "launch"
+		vscode.runtimeExecutable = "gradle"
+		vscode.args = {}
+		if task and task ~= "" then
+			for tkn in (task .. ""):gmatch("%S+") do
+				table.insert(vscode.args, tkn)
+			end
+		end
+		vscode.cwd = parsed.options.WORKING_DIRECTORY
+				and parsed.options.WORKING_DIRECTORY:gsub("%$PROJECT_DIR%$", "${workspaceFolder}")
+			or "${workspaceFolder}"
+		if next(parsed.env) then
+			vscode.env = parsed.env
+		end
+		return vscode
+	end
+
+	-- Fallback: produce a shell launch that echos an unsupported type
+	return {
+		type = "pwa-node",
+		name = parsed._attrs.name or "Converted (unsupported)",
+		request = "launch",
+		program = "${file}",
+		cwd = "${workspaceFolder}",
+	}
+end
+
+-- Main: scan .idea/runConfigurations and convert
+function M.convert_all(opts)
+	opts = opts or {}
+	local pattern = ".run/*.xml"
+	local files = vim.tbl_filter(function(p)
+		return p ~= ""
+	end, vim.fn.glob(pattern, false, true))
+	if #files == 0 then
+		error(".run not found or no xml files present")
+	end
+
+	local configs = {}
+	for _, f in ipairs(files) do
+		local content = read_file(f)
+		if not content then
+			vim.notify("Cannot read " .. f, vim.log.levels.WARN)
+		end
+		local name = f:match("([^/]+)%.xml$") or f
+		local parsed = parse_run_configuration(content)
+		if parsed then
+			local vs = map_to_vscode(name, parsed)
+			table.insert(configs, vs)
+		else
+			vim.notify("Skipping (unrecognized) " .. f, vim.log.levels.DEBUG)
+		end
+	end
+
+	local launch = { version = "0.2.0", configurations = configs }
+	local ok, j = pcall(vim.fn.json_encode, launch)
+	if not ok then
+		error("Failed to encode launch.json")
+	end
+	write_file(".vscode/launch.json", j)
+	return true
+end
+
+return M