Jenkine Pipeline Basic Usage

Jenkins pipeline is groovy based DSL, we can use groovy to access the Jenkins instance, and access its project job, or even builds.

In order to access the Jenkins instance, we need to import its class.

import jenkins.model.Jenkins
import hudson.model.*

def job = Jenkins.instance.getItemByFullName('project name')

For free style job, its class is hudson.model.FreeStyleProject. * list its build

def builds = job.builds

The class of the builds is hudson.util.RunList<hudson.model.FreeStyleBuild>. * get build's parameters as a HashMap

def paras = build.actions.find{ it instanceof ParametersAction }?.parameters
def map = new java.util.HashMap<String, String>()
for (def p : paras) {
   map.put(p.name, p.value)
}
return map

• get build's environment variables (depends on EnvInject plugin)

def envs = build.actions.find{it instanceof org.jenkinsci.plugins.envinject.EnvInjectPluginAction}.getEnvInjectVarList().getEnvMap()

def map = new java.util.HashMap<String, String>()
for (def env : envs) {
    map.put(p.key, p.value)
}
return map