updated jenkinsfile

JenkinsFile

@@ -1,3 +1,37 @@
-def buildNumber = env.BUILD_NUMBER as int
-if (buildNumber > 1) milestone(buildNumber - 1)
-milestone(buildNumber)
+pipeline {
+    agent any
+
+    stages {
+        stage('Abort previous running builds') {
+            steps {
+                abortPreviousRunningBuilds()
+            }
+        }
+
+        stage('Build') {
+            steps {
+                sleep(5)
+            }
+        }
+
+        stage('Test') {
+            steps {
+                sleep(5)
+            }
+        }
+    }
+}
+
+def abortPreviousRunningBuilds() {
+    def previousBuild = currentBuild.getRawBuild().getPreviousBuildInProgress()
+    while (previousBuild != null) {
+        if (previousBuild.isInProgress()) {
+            def executor = previousBuild.getExecutor()
+            if (executor != null) {
+                echo ">> Aborting older build #${previousBuild.number}"
+                executor.interrupt(Result.ABORTED, new CauseOfInterruption.UserInterruption("Aborted by newer build #${currentBuild.number}"))
+            }
+        }
+        previousBuild = previousBuild.getPreviousBuildInProgress()
+    }
+}