/**
 * Return all job related vars without executor vars.
 * I.e. slave is running in osx, but docker image for shell is linux.
 */
protected static EnvVars getEnvVars(Run run, TaskListener listener) throws IOException, InterruptedException {
    final EnvVars envVars = run.getCharacteristicEnvVars();

    // from run.getEnvironment(listener) but without computer vars
    for (EnvironmentContributor ec : EnvironmentContributor.all().reverseView()) {
        // job vars
        ec.buildEnvironmentFor(run.getParent(), envVars, listener);

        // build vars
        if (ec instanceof CoreEnvironmentContributor) {
            // exclude executor computer related vars
            envVars.put("BUILD_DISPLAY_NAME", run.getDisplayName());

            String rootUrl = Jenkins.getInstance().getRootUrl();
            if (rootUrl != null) {
                envVars.put("BUILD_URL", rootUrl + run.getUrl());
            }

            // and remove useless job var from CoreEnvironmentContributor
            envVars.remove("JENKINS_HOME");
            envVars.remove("HUDSON_HOME");
        } else {
            ec.buildEnvironmentFor(run, envVars, listener); // build vars
        }
    }


    return envVars;
}