Jenkinsfile.groovy

def service = "microservicea"

node('master') {
  stage('Checkout') {
    checkout poll:false, scm: [
      $class: 'GitSCM', branches: [[name: "${GIT_BRANCH}"]], userRemoteConfigs: [[ url: "${GIT_URL}" ]]
    ]
  }

  stage('Build') {
    docker.build(service)
  }

  stage('Push') {
    def region = _get_aws_region()
    def account_id = _get_aws_account_id(region)
    def repo = service
    def registry = _get_aws_ecr_url(region, account_id, repo)
    def img = service

    docker.withRegistry(registry){
      // Login to ECR
      _ecr_login(region)

      // Docker Tag
      docker.image(img).tag("latest")

      // Docker Push
      docker.image(img).push("latest")
    }
  }
}

def _get_aws_region() {
    def region = sh (
        script: 'curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | jq .region -r',
        returnStdout: true
    ).trim()
    return region
}

def _get_aws_account_id(region){
    def account_id = sh (
        script: "aws ec2 --region ${region} describe-security-groups --query 'SecurityGroups[0].OwnerId' --output text",
        returnStdout: true
    ).trim()
    return account_id
}

def _get_aws_ecr_url(region, account_id, repo){
  return "https://${account_id}.dkr.${region}.amazonaws.com/${repo}"
}

def _ecr_login(region){
  def get_login = "aws ecr get-login --region ${region}"
  def get_login_stdout = sh (script: get_login, returnStdout: true).trim()
  sh (script: get_login_stdout, returnStdout: false)
}