Jenkins snippets

branch_fallback_Jenkinsfile

# checkout a repository with branch fallback
repos.split(',').each {
    echo "Checking out ${it}"
    dir("${it}"){
        checkout resolveScm(
            source: [
                $class: 'GitSCMSource',
                credentialsId: '51234-5678-9101-2131',
                id: '_',
                remote: "[email protected]:somebody/${it}.git",
                traits: [[$class: 'jenkins.plugins.git.traits.BranchDiscoveryTrait']]],
                targets: ["${params.BLD_BRANCH}", "${params.FALL_BLD_BRANCH}"]
        )
        echo "========== DONE =========="
    }
}

free_local_port_Jenkinsfile

// requires python but no approval
String port = sh(script: 'echo $(python -c \'import socket; s=socket.socket(); s.bind(("", 0)); print(s.getsockname()[1]); s.close()\');', returnStdout: true)

// requires approval, looks better
// actually doesn't work
// https://issues.jenkins-ci.org/browse/JENKINS-56330
def port = new ServerSocket(0).withCloseable { socket -> socket.getLocalPort() }

multirepo_Jenkinsfile

# loop through a variable and checkout each repository in it's own folder
repos.split(',').each {
    echo "Checking out ${it}"
    dir("${it}"){
        checkout([
            $class: 'GitSCM',
            branches: [[name: "*/${params.BLD_BRANCH}"]],
            doGenerateSubmoduleConfigurations: false,
            extensions: [[$class: 'CleanCheckout']],
            submoduleCfg: [],
            userRemoteConfigs: [[credentialsId: '1234-5678-9101-2131', url: "[email protected]:somebody/${it}.git"]]
        ])
        echo "========== DONE =========="
    }
}