[Jenkins] Define a pipeline

node{
    stage 'checkout'
    git '[github_url]'

    def project_path="[project_path]"

    // everythin in dir block will based on project bath
    dir(proejct_path) {

        stage 'compiling, test, packing'
        sh 'mvn clean package'

        stage 'archival'
        step([
            $class: 'ArtifcatArchiver',
            artifacts: "target/*.jar",
            excludes: null
            ])
    }
}

Add 'stage' which we can know what is the progress in a high level way:

'sh' is for any shell commands.

Pipeline is written in Rudy, so can use rudy syntax to def a variable.