Jenkins pipeline - An approach to get all commits since the last successful build.

Jenkinsfile

// -*- 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
}

Solution using jenkins changelogsets

@NonCPS
def getAllChangeResults() {
	def result = getChangeStringForBuild(currentBuild)

	def buildToCheck = currentBuild.getPreviousBuild()
	while (buildToCheck != null && buildToCheck.result != 'SUCCESS') {
		result += "\nBuild #${buildToCheck.number} [${buildToCheck.result}]\n"
		result += getChangeStringForBuild(buildToCheck)

		buildToCheck = buildToCheck.previousBuild
	}

	return result
}

@NonCPS
def getChangeStringForBuild(build) {
    MAX_MSG_LEN = 60

    echo "Gathering SCM changes"
    def changeLogSets = build.changeSets
	def changeString = ""

    for (int i = 0; i < changeLogSets.size(); i++) {
        def entries = changeLogSets[i].items
        for (int j = 0; j < entries.length; j++) {
            def entry = entries[j]
            def truncated_msg = entry.msg.take(MAX_MSG_LEN)
			if (entry.msg.length() > MAX_MSG_LEN) {
				truncated_msg += "..."
			}

            changeString += "-[@${entry.author.getFullName().toLowerCase()}][${entry.commitId.take(6)}]: ${truncated_msg}\n"
        }
    }

    if (!changeString) {
        changeString = " - No new changes"
    }

    return "${changeString}"
}

Has anyone else having trouble with getRevisionList() ?

I keep receiving the following

[ERROR: getRevisionList]: org.jenkinsci.plugins.workflow.job.WorkflowRun

I believe its due to the git rev-list shell command as my multi-branch pipeline jobs are being merged before any building occurs. Seems to be comparing the same commit and erroring out. Testing the git rev-list on my local machine seems to output a bunch of git sha's out.

roman-acumen commented on Nov 22, 2019

Thank you!

@NonCPS
def commitHashForBuild( build ) {
def scmAction = build?.actions.find { action -> action instanceof jenkins.scm.api.SCMRevisionAction }
return scmAction?.revision?.hash
}

Does this only works with multibranch pipeline jobs and doesnot work with regular jobs? This doesnot seem to work for me for regular jobs..

in a multi branch pipeline there is a env var exposed GIT_PREVIOUS_COMMIT. This seems to be the commit of the last build however regardless of pass fail.

Is there a way i can get the getLastSuccessfulCommit in a Declarative Pipeline ?

GIT_PREVIOUS_SUCCESSFUL_COMMIT is the environment variable exposed by jenkins build and provides the last successful build git commit.

GIT_PREVIOUS_SUCCESSFUL_COMMIT is the environment variable exposed by jenkins build and provides the last successful build git commit.

simple variable! it works.