Jenkinsfile

pipeline {
  agent {
    label 'jenkins-builder'
  }

  options { 
    ansiColor('xterm') 
    timestamps()
    disableConcurrentBuilds()
    timeout(time: 1, unit: 'HOURS')
    buildDiscarder(logRotator(numToKeepStr: '5'))
  }

  environment {
    DOCKER_TOKEN = "DOCKER_TOKEN"
    DOCKER_IMAGE_NAME = "gcr.io/jenkins-160014/petalmd.web"
    WORKERS = 1
    // BUILD_NUMBER = env.BUILD_NUMBER
    BUILD_LABEL = buildLabel()
    DOCKER_PRELOAD = "cypress/base:8 petalmd/petalmd.rails:master theasci/docker-mysql-tmpfs redis:3.2 elasticsearch:1.7"
  }

  stages {
    // Pre-build phase
    stage('Git merge master') {
      when {
        not {
          branch 'master'
        }
      }

      steps {
        mergeMaster()
      }
    }
    
    stage('Prepare build') {
      parallel {
        stage('Prepare docker image') {
          steps {
            
            sh "docker pull jmaitrehenry/google-cloud-sdk 1> /dev/null"
            sh "docker login -u ${dockerUser} -p '${dockerPass}'"

            sh '''
            export FRONTEND_IMAGE=${DOCKER_IMAGE_NAME}:${GIT_COMMIT}
            docker-compose -f docker-compose.yml -f docker-compose.test.yml up -d --build frontend
            docker run --rm -i -v /ci/jenkins/gcloud:/root/.config/gcloud -v /var/run/docker.sock:/var/run/docker.sock jmaitrehenry/google-cloud-sdk gcloud docker -- push ${FRONTEND_IMAGE} 1> /dev/null
            '''
          }
        }
        stage('Provision build environment') {
          steps {
            provisionBuildEnvironment()
          }
        }
      }
    }

    stage('Run') {
      parallel {
        stage('Lints') {
          steps {
            sh '''
            #!/bin/bash

            docker-compose -f docker-compose.yml -f docker-compose.test.yml run test bin/ci -l
            '''
          }
        }
        
        stage('unit') {
          agent {
            label buildLabel()
          }
          steps {
            sh 'echo "units!!"'
          }
        }
        
        stage('E2E') {
          agent {
            label buildLabel()
          }
          steps {
            sh 'echo "e2e!!"'
          }
        }
      }
    }

    post {
      always {
        sh 'echo "Deprovision build environment"'
        deprovisionBuildEnvironment()
        
        sh 'echo "Validate test results"'
        sh 'echo "Validate test results"'
      }
    }
  }
}

def mergeMaster() {
  sshagent (credentials: ['Github_deploy_key']) {
    sh 'git fetch origin master'
  }

  sh '''
  git config user.email jenkins@petalmd.com
  git config user.name "Jenkins"
  git checkout FETCH_HEAD
  git merge --ff -q origin/$BRANCH_NAME
  '''
}

def provisionBuildEnvironment() {
  sh '''
    #!/bin/bash
    docker pull jmaitrehenry/google-cloud-sdk 1> /dev/null
    docker run --rm -i \
      -v /ci/jenkins/gcloud:/root/.config/gcloud \
      -v `pwd`/config:/config \
      jmaitrehenry/google-cloud-sdk \
        gcloud deployment-manager deployments create ${BUILD_LABEL} \
          --config /config/gce.jinja \
          --properties targetSize:${WORKERS},buildId:${BUILD_NUMBER},buildName:${BUILD_LABEL},dockerPreloadImage:"${DOCKER_PRELOAD}"
  '''
}

def deprovisionBuildEnvironment() {
  sh '''
  docker run --rm -i \
    -v /ci/jenkins/gcloud:/root/.config/gcloud \
    jmaitrehenry/google-cloud-sdk \
      gcloud deployment-manager deployments delete -q --async ${BUILD_LABEL}
  '''

  script {
    for (aSlave in hudson.model.Hudson.getInstance().getSlaves()) {
      if (aSlave.getLabelString() == envName) {
        aSlave.toComputer().doDoDelete();
        println('Node ' + aSlave.getNodeName() + ' deleted');
      }
    }
  }
}