class CopyArtifactSteps {

 static void getLockfilesFromUpstream(CpsScript currentBuild) {
 getLockfilesFromUpstreamNonCps(currentBuild)
 }

 @NonCPS
 static void getLockfilesFromUpstreamNonCps(CpsScript currentBuild) {
 // It's not good, but we get have to validate that it's an upstream cause in a previous step
 // Passing Hudson Causes around makes @NonCPS viral in methods and such
 RunWrapper runWrapper = currentBuild.currentBuild as RunWrapper
 Cause causeType = runWrapper.getRawBuild().getCauses().last()
 Cause.UpstreamCause upstreamCause = causeType as Cause.UpstreamCause
 String upstreamProjectName = upstreamCause.upstreamProject
 copyArtifact(currentBuild, upstreamProjectName)
 }

 @NonCPS
 static void copyArtifact(CpsScript currentBuild, String upstreamProjectName) {
 currentBuild.copyArtifacts(
 projectName: upstreamProjectName,
 filter: "" +
 "**/${DemoConstant.DOCKER_IMAGE_FILENAME}, " +
 "**/${DemoConstant.CONAN_LOCKFILE_FILENAME}, " +
 "**/${DemoConstant.CONAN_BUILDORDER_FILENAME}",
 target: 'upstream',
 selector: currentBuild.upstream()
 )
 }
}