BrowserStack integration with Jenkins

withBrowserStack.groovy

#!/usr/bin/env groovy

def call(body) {
    lock(label: 'BrowserStack', quantity: 1) {
        env.BROWSERSTACK_LOCAL_IDENTIFIER = env.BUILD_TAG
        // Start the connection
        sh "BUILD_ID=dontKillMe nohup /opt/BrowserStackLocal --force-local --only-automate --key ${env.BROWSERSTACK_ACCESSKEY} --local-identifier ${env.BROWSERSTACK_LOCAL_IDENTIFIER} > /var/tmp/browserstack.log 2>&1 & echo \$! > /var/tmp/browserstack.pid"
        try {
            body()
        }
        finally {
            // Stop the connection
            sh "kill `cat /var/tmp/browserstack.pid`"
        }
    }
}

This is a snippet from our Jenkins shared library which is currently closed source.
It assumes that BrowserStackLocal is installed in /opt directory and that the BrowserStack access key is available via environment variable BROWSERSTACK_ACCESSKEY.
In addition, in order to limit the parallel jobs that can use BrowserStack due to billing issue I use Lockable Resources Plugin.