Jenkinsfile4

#!/usr/bin/env groovy

@Library('shared-library@master') _ //master or whatever branch

  def getDockerTag(){
        def tag = sh script: 'git rev-parse HEAD', returnStdout: true
        return tag
        }

pipeline{
      agent any
       environment{
	    Docker_tag = getDockerTag()
        }
      parameters {
	      choice(name:'mvnaction',
	      choices: 'Clean\nCompile\nTest\nInstall',
	      description: 'based on selection jenkins will run resepective maven command')
    	}
        
        stages{

              stage('build'){
		      
		      agent {
                	docker {
                	image 'maven'
                	args '-v $HOME/.m2:/root/.m2'
               		    }
           	 	}
		      
                  steps{
			                    script{
                                    sh "mvn --version"
                                      sh "echo $mvnaction"
                                      if ("${mvnaction}" == "Clean")
                                            {
                                            sh "mvn clean"
                                            }
                                      else if ("${mvnaction}" == "Compile")
                                            {
                                            sh "mvn clean compile"
                                            }
                                       else if ("${mvnaction}" == "Test")
                                            {
                                            sh "mvn clean test"
                                            }
                                         else if ("${mvnaction}" == "Install")
                                            {
                                            sh "mvn clean install"
                                            }
                        }
               	     }  
                 }
		
		stage ('docker build and push') {
			
		   when {
				expression { params.mvnaction == 'Install' }
			}
                    steps {
                                  script{
                                         sh 'cp -r ../shared-library@2/target .'
                                         sh 'docker build . -t deekshithsn/devops-training:$Docker_tag'
                                           withCredentials([string(credentialsId: 'docker_password', variable: 'docker_password')]) {

                                              sh 'docker login -u deekshithsn -p $docker_password'
                                              sh 'docker push deekshithsn/devops-training:$Docker_tag'
                                          }
                       }
                    }
                }
		
                 
                 stage ('Check logs') {
                    steps {
                       script {
                            
                                sh '! grep "WARNING" currentBuild.rawBuild.getLog(10000).join('\n')'
			       
                        }
                    }
                }
		
           }	       	     	         
}