Configure Jenkins Global Pipeline Library via Groovy

Question

How can a Jenkins Global Pipeline Library, which can be configured in the Jenkins master, be set up using Groovy code?

Answer 1

Derived from the great answer of StephenKing, here is the new way to do for the ModernSCM using GitSCMSource:

import org.jenkinsci.plugins.workflow.libs.SCMSourceRetriever;
import org.jenkinsci.plugins.workflow.libs.LibraryConfiguration;
import jenkins.plugins.git.GitSCMSource;

def globalLibsDesc = Jenkins.getInstance()
        .getDescriptor("org.jenkinsci.plugins.workflow.libs.GlobalLibraries")
SCMSourceRetriever retriever = new SCMSourceRetriever(new GitSCMSource(
        "someId",
        "mygitrepo",
        "credentialId",
        "*",
        "",
        false))
LibraryConfiguration pipeline = new LibraryConfiguration("pipeline", retriever)
        .setDefaultVersion(env.BRANCH_NAME)
        .setImplicit(true)
globalLibsDesc.get().setLibraries([pipeline])