How to get the BUILD_USER in Jenkins when job triggered by timer?

Question

I wanted to show the user who triggered a Jenkins job in the post job email. This is possible by using the plugin Build User Vars Plugin and the env variable

Answer 1

I found similar but really working on Jenkins 2.1.x and easy for my understanding way. And it works without any plugins.

if (currentBuild.getBuildCauses('hudson.model.Cause$UserIdCause')['userId']){
    // Will be run only if someone user triggers build
    // Because in other cases this contructions returns null
}

You can use in this construction any classes described here. They will be returns maps with usable values.