declarative_jenkinsfile_template.txt

pipeline {

//list of directives: [environment|options|parameters|triggers|stage|tools|input|when]

	//Required section
	//At top-level pipeline block level: must be defined here
	//At stage-level: Optional usage
	agent 
	- any 
	- none 
	- { label 'my-defined-label' }
	- { node { [label | customWorkspace] '<argument>' }}
	- { docker {[args | label | image] '<argument>'}}
	- { dockerfile {[filename | dir | label] '<argument>'}}

	//Directive
	//Allowed at top-level pipeline block & each stage block
	environment {
		//store key:value pairs
		CC = 'clang'
		//credentials(): access predefined credentials by id from Jenkins environment
		AN_ACCESS_KEY = credentials('my-prefined-secret-text')	
	}
	
	//Only once: inside pipeline block
	triggers {
		-cron('H */4 * * 1-5')	//example
		-pollSCM('H */4 * * 1-5')
		-upstream(upstreamProjects: 'job1,job2', threshold: <value>)	//<comma-separated-string of jobs>
	}
	
	//Inside pipeline block or stage block
	tools {
		-maven 'apache-maven-3.0.1'
		-jdk ''
		-gradle ''
	}
	
	//Required section
	//Only once: inside pipeline block
	stages {
		//sequence of 1 or more stage directives
		stage('stage_name') {
		
			//same as before
			agent {
			}
		
			//same as before
			environment {
			}
		
			//Required
			//Inside each stage block
			steps {
				echo 'Hello World'
				sh 'mvn --version'
				
				script {
				
				}			
			}
		}
	}
	
	//Section
	//Allowed at top-level pipeline block & each stage block
	//Usually at end of pipeline
	post {
		[always|changed|fixed|regression|aborted|failure|success|unstable|cleanup] {}
	}

}