gcaaa31928 · February 24, 2020 05:26 · Apr 13, 2017
diff --git a/Jenkinsfile b/Jenkinsfile
@@ -0,0 +1,37 @@
+// -*- mode: groovy -*-
+// vim: set filetype=groovy :
+
+node( 'some_node' ) {
+  stage( "Phase 1" ) {
+    sshagent( credentials: [ 'some_creds' ] ) {
+      checkout scm
+      def lastSuccessfulCommit = getLastSuccessfulCommit()
+      def currentCommit = commitHashForBuild( currentBuild.rawBuild )
+      if (lastSuccessfulCommit) {
+        commits = sh(
+          script: "git rev-list $currentCommit \"^$lastSuccessfulCommit\"",
+          returnStdout: true
+        ).split('\n')
+        println "Commits are: $commits"
+      }
+    }
+  }
+}
+
+def getLastSuccessfulCommit() {
+  def lastSuccessfulHash = null
+  def lastSuccessfulBuild = currentBuild.rawBuild.getPreviousSuccessfulBuild()
+  if ( lastSuccessfulBuild ) {
+    lastSuccessfulHash = commitHashForBuild( lastSuccessfulBuild )
+  }
+  return lastSuccessfulHash
+}
+
+/**
+ * Gets the commit hash from a Jenkins build object, if any
+ */
+@NonCPS
+def commitHashForBuild( build ) {
+  def scmAction = build?.actions.find { action -> action instanceof jenkins.scm.api.SCMRevisionAction }
+  return scmAction?.revision?.hash
+}