[JENKINS-68543] Support for ChangelogToBranch

We miss the ChangelogToBranchTrait.

It would be nice to have this trait, so that the currentBuild.rawBuild.changeSets variable is filled and the emailext plugin can find the developers from the commits.

Actually we must use this code to manually checkout.

checkout([

    $class: 'GitSCM',

    doGenerateSubmoduleConfigurations: scm.doGenerateSubmoduleConfigurations,

    userRemoteConfigs: scm.userRemoteConfigs


    // important changes

    branches: [[name: "FETCH_HEAD"]],

    extensions: scm.extensions + [[$class: 'LocalBranch'], [$class: 'ChangelogToBranch', options: [compareRemote: 'origin', compareTarget: env.CHANGE_TARGET]]],

])

With this the currentBuild.rawBuild.changeSets variable is filled and all works as aspected.

See also https://issues.jenkins.io/browse/JENKINS-14138 & https://issues.jenkins.io/browse/JENKINS-24638

---
Originally reported by gimler, imported from: Support for ChangelogToBranch

• status: Open
  
• priority: Minor
  
• component(s): github-branch-source-plugin
  
• label(s): configuration, git, plugin
  
• resolution: Unresolved
  
• votes: 1
  
• watchers: 2
  
• imported: 2025-12-02
  

We miss the ChangelogToBranchTrait.


It would be nice to have this trait, so that the currentBuild.rawBuild.changeSets variable is filled and the emailext plugin can find the developers from the commits.


Actually we must use this code to manually checkout.



checkout([

    $class: 'GitSCM',

    doGenerateSubmoduleConfigurations: scm.doGenerateSubmoduleConfigurations,

    userRemoteConfigs: scm.userRemoteConfigs


    // important changes

    branches: [[name: "FETCH_HEAD"]],

    extensions: scm.extensions + [[$class: 'LocalBranch'], [$class: 'ChangelogToBranch', options: [compareRemote: 'origin', compareTarget: env.CHANGE_TARGET]]],

])





With this the currentBuild.rawBuild.changeSets variable is filled and all works as aspected.


See also https://issues.jenkins.io/browse/JENKINS-14138 & https://issues.jenkins.io/browse/JENKINS-24638

The issue names no repository files or tests. Start by locating the GitHub Branch Source checkout integration and compare it with the provided ChangelogToBranch Pipeline snippet, then review JENKINS-14138 and JENKINS-24638. Done means the plugin supports ChangelogToBranch so currentBuild.rawBuild.changeSets is populated and emailext can find commit developers.

Written by the indexing model from the issue text.