Ability to include changelog information on pipeline script

[olexandrd]

Currently there is not opportunity to include changes (github changelog) in messages from pipeline script, but this option is available in freestyle projects (Post-build Actions -> Slack Notifications -> Advanced -> Notification message includes).

[olexandrd]

Found workaround there - https://support.cloudbees.com/hc/en-us/articles/217630098-How-to-access-Changelogs-in-a-Pipeline-Job-.
As a result, my declarative pipeline script looks next:

@NonCPS
def getChangeString() {
    MAX_MSG_LEN = 100
    def changeString = ""
    echo "Gathering SCM changes"
    def changeLogSets = currentBuild.rawBuild.changeSets
    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]
            truncated_msg = entry.msg.take(MAX_MSG_LEN)
            changeString += " - ${truncated_msg} [${entry.author}]\n"
        }
    }
    if (!changeString) {
        changeString = " - No new changes"
    }
    return changeString
} 

pipeline {
    agent none
    stages {...}
    post {
        success {
           slackSend (color: '#32CD32', message: "${env.JOB_NAME} Success, Changes: \n$changeString")
        }
}

[rafitadiaz]

This should be part of the basic options for the pipeline method.
I also needed the triggering causes in my notifications and I also needed to find a workaround: https://stackoverflow.com/questions/46908390/jenkins-declarative-pipeline-find-out-triggering-job

// vars/getTriggerCause.groovy
@NonCPS
def call() {    
    def triggerCause = "" 
    echo "Get triggering Cause"
    
    // Get triggering information
    def causes = currentBuild.rawBuild.getCauses()
    for(cause in causes) {
        if (cause.class.toString().contains("UpstreamCause")) {
            triggerCause += "Triggered by job: " + cause.upstreamProject + "\n"
        } else {
            // This method already add "Started by " in the description
            triggerCause += cause.getShortDescription()  + "\n"
        }
    }

    return triggerCause
}

[samwar]

That code can be written in a more groovy way:

def getChanges) {
    MAX_MSG_LEN = 100
    def changes = ""
    echo "Gathering SCM changes"
    def changeLogSets = currentBuild.rawBuild.changeSets
    changeLogSets.each { def changeLogSet ->
        def entries = changeLogSet.items
        entries.each { def entry ->
            truncated_msg = entry.msg.take(MAX_MSG_LEN)
            changes += " - $truncated_msg [$entry.author]\n"
        }
    }
    if (!changes) {
        changes = " - No new changes"
    }
    return changes
}