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#!/usr/bin/env node

"use strict";

// playwright CLI wrapper that adds electron support.

// re-implements the terminal client with shorter socket paths

// (macOS unix socket limit is 104 bytes) and spawns our electron

// daemon which composes playwright internals directly.

const crypto = require("crypto");

const fs = require("fs");

const net = require("net");

const os = require("os");

const path = require("path");

const cp = require("child_process");

// --- socket path computation (uses tmpdir for short paths) ---

const installationHash = crypto

.createHash("sha1")

.update(require.resolve("playwright/package.json"))

.digest("hex")

.substring(0, 16);

function daemonSocketDir() {

const socketsDir = path.join(os.tmpdir(), "playwright-cli");

return path.join(socketsDir, installationHash);

}

function daemonSocketPath(sessionName) {

if (os.platform() === "win32")

return `\\\\.\\pipe\\${installationHash}-${sessionName}.sock`;

const socketPath = path.join(daemonSocketDir(), `${sessionName}.sock`);

if (Buffer.byteLength(socketPath) > 104)

throw new Error(

`Socket path too long (${Buffer.byteLength(socketPath)} bytes, max 104). Use a shorter --session name.`,

);

return socketPath;

}

// --- socket session (newline-delimited JSON protocol) ---

class SocketSession {

constructor(socket) {

this._nextId = 1;

this._callbacks = new Map();

this._pendingBuffers = [];

this._socket = socket;

socket.on("data", (buf) => this._onData(buf));

socket.on("close", () => this.dispose());

socket.on("error", () => {});

}

async runCliCommand(args) {

return this._send("runCliCommand", { args });

}

async _send(method, params = {}) {

const id = this._nextId++;

const msg = JSON.stringify({ id, method, params }) + "\n";

await new Promise((resolve, reject) => {

this._socket.write(msg, (err) => (err ? reject(err) : resolve()));

});

return new Promise((resolve, reject) => {

this._callbacks.set(id, { resolve, reject });

});

}

dispose() {

for (const cb of this._callbacks.values()) cb.reject(new Error("Disposed"));

this._callbacks.clear();

this._socket.destroy();

}

_onData(buffer) {

let end = buffer.indexOf("\n");

if (end === -1) {

this._pendingBuffers.push(buffer);

return;

}

this._pendingBuffers.push(buffer.slice(0, end));

this._dispatch(Buffer.concat(this._pendingBuffers).toString());

let start = end + 1;

end = buffer.indexOf("\n", start);

while (end !== -1) {

this._dispatch(buffer.toString(undefined, start, end));

start = end + 1;

end = buffer.indexOf("\n", start);

}

this._pendingBuffers = [buffer.slice(start)];

}

_dispatch(message) {

let obj;

try {

obj = JSON.parse(message);

} catch {

console.error("Failed to parse daemon message:", message);

return;

}

if (obj.id && this._callbacks.has(obj.id)) {

const cb = this._callbacks.get(obj.id);

this._callbacks.delete(obj.id);

if (obj.error) cb.reject(new Error(obj.error));

else cb.resolve(obj.result);

}

// --- daemon management ---

async function socketExists(socketPath) {

try {

const stat = await fs.promises.stat(socketPath);

return stat?.isSocket();

} catch {

return false;

}

async function connectToSocket(socketPath) {

return new Promise((resolve, reject) => {

const socket = net.createConnection(socketPath, () => resolve(socket));

socket.on("error", reject);

});

}

async function connectToDaemon(sessionName) {

const socketPath = daemonSocketPath(sessionName);

// try to connect to existing daemon.

// on Windows, named pipes aren't detected by stat().isSocket(),

// so we always attempt a direct connection.

if (os.platform() === "win32" || (await socketExists(socketPath))) {

try {

const socket = await connectToSocket(socketPath);

return new SocketSession(socket);

} catch {

if (os.platform() !== "win32")

await fs.promises.unlink(socketPath).catch(() => {});

}

// ensure socket directory exists

await fs.promises.mkdir(daemonSocketDir(), { recursive: true });

// spawn the electron daemon

const daemonScript = path.resolve(

__dirname,

"playwright-electron",

"electron-daemon.js",

);

const userDataDir = path.resolve(

daemonSocketDir(),

`${sessionName}-user-data`,

);

const args = [

daemonScript,

`--daemon=${socketPath}`,

`--user-data-dir=${userDataDir}`,

];

// auto-inject config file if available

const configFile =

process.env.PLAYWRIGHT_MCP_CONFIG ||

path.resolve(process.cwd(), ".playwright", "cli.config.json");

if (fs.existsSync(configFile)) args.push(`--config=${configFile}`);

const stderrLog = path.join(daemonSocketDir(), `${sessionName}-stderr.log`);

const stderrFd = fs.openSync(stderrLog, "w");

const child = cp.spawn(process.execPath, args, {

detached: true,

stdio: ["ignore", "ignore", stderrFd],

cwd: process.cwd(),

});

child.unref();

fs.closeSync(stderrFd);

// retry connection

const maxRetries = 50;

for (let i = 0; i < maxRetries; i++) {

await new Promise((r) => setTimeout(r, 100));

try {

const socket = await connectToSocket(socketPath);

return new SocketSession(socket);

} catch (e) {

if (e.code !== "ENOENT" && e.code !== "ECONNREFUSED") throw e;

}

let detail = "";

try {

detail = fs.readFileSync(stderrLog, "utf-8").trim();

} catch {}

throw new Error(

`Failed to connect to daemon at ${socketPath} after ${maxRetries * 100}ms` +

(detail ? `\nDaemon stderr:\n${detail}` : ""),

);

}

// --- main ---

async function main() {

const argv = process.argv.slice(2);

const args = require("minimist")(argv);

if (args.version || args.v) {

const pkg = require("./package.json");

console.log(pkg.version);

process.exit(0);

}

// load help from playwright's terminal CLI

const playwrightDir = path.dirname(

require.resolve("playwright/package.json"),

);

let help;

try {

help = require(path.join(playwrightDir, "lib/mcp/terminal/help.json"));

} catch {

help = {

commands: {},

global: "electron-playwright-cli <command> [options]",

};

}

const commandName = args._[0];

if (args.help || args.h) {

if (help.commands[commandName]) {

console.log(help.commands[commandName]);

} else {

console.log(

"electron-playwright-cli - run playwright mcp commands for electron apps\n",

);

console.log(help.global);

}

process.exit(0);

}

if (!commandName) {

console.error("No command specified.\n");

console.log(help.global);

process.exit(1);

}

const sessionName =

args.session || process.env.PLAYWRIGHT_CLI_SESSION || "default";

const session = await connectToDaemon(sessionName);

const result = await session.runCliCommand(args);

console.log(result);

session.dispose();

}

main().catch((e) => {

console.error(e.message);

process.exit(1);

});

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