How to share a Declarative Pipeline across many projects

Question

I have a lot of projects in different repositories which share the same fundamental CI-workflow, which I can easily express as a Declarative Pipeline:

pipeline {         


        

Answer 1

I am able to use a Shared Library to define a Declarative pipeline that is configurable via a YAML file.

In my repo/project I define a Jenkinsfile to call the Shared Library:

@Library('my-shared-library')_

pipelineDefault(); // cannot be named 'pipeline'

and a Jenkinsfile.yaml to configure the build parameters:

project_name: my_project
debug: true
# you get the idea

Then in my vars/pipelineDefault.groovy file a very simple Shared Library could look like this:

def call() {
  Map pipelineConfig = readYaml(file: "${WORKSPACE}/Jenkinsfile.yaml }")
  node {
    stage('Build'){
      println "Building: ${pipelineConfig.project_name}"
    }
  }
}  

Of course this is a very simplified example, but the dynamic configuration DOES work.

NOTE: this requires the pipeline-utility-steps plugin to read the YAML file