index.js

const core = require("@actions/core");
const exec = require("@actions/exec");

async function main() {
  try {
    if (process.platform == "linux") {
      await exec.exec("sudo apt-get update");
      await exec.exec("sudo apt-get install -y xvfb x11-xserver-utils");
    }

    const commands = core.getInput("run", { required: true }).split("\n");
    const directory = core.getInput("working-directory");
    const serverOptions = core.getInput("options");

    for (i in commands) {
      if (process.platform == "linux") {
        console.log("Command: " + commands[i]);
        await runCommandWithXvfb(commands[i], directory, serverOptions);
      } else {
        await runCommand(commands[i], directory);
      }
    }
  } catch (error) {
    core.setFailed(error.message);
  }
}

async function runCommandWithXvfb(command, directory, options) {
  const optionsArgument = options ? `-s "${options}"` : "";
  command = `xvfb-run --auto-servernum ${optionsArgument} ${command}`;

  try {
    await runCommand(command, directory);
  } finally {
    await cleanUpXvfb();
  }
}

async function cleanUpXvfb() {
  try {
    await exec.exec("bash", [`${__dirname}/cleanup.sh`]);
  } catch {}
}

async function runCommand(command, directory) {
  await (directory
    ? exec.exec(command, [], { cwd: directory })
    : exec.exec(command));
}

main();