String cron_string = BRANCH_NAME == "master" ? "@daily" : ""
pipeline {
  agent any
  options  { parallelsAlwaysFailFast() }
  triggers { cron(cron_string) }
  environment {
    PROJECT        = 'transmission-hacks'
    IMAGE_NAME     = "docker.io/chn2guevara/$PROJECT"
  }
  stages {
    stage('Prepare') {
      steps { sh 'apt-get update && apt-get install -y buildah' }
    }
    stage('Manifest') {
      steps { sh "buildah manifest create $PROJECT" }
    }
    stage('Build') {
      parallel {
        stage('arm64/v8') {
          steps {
            sh"""
              buildah build --arch arm64/v8 --network host \
                --tag $IMAGE_NAME:latest --manifest $PROJECT .
            """
          }
        }
        stage('amd64') {
          steps {
            sh"""
              buildah build --arch amd64 --network host \
                --tag $IMAGE_NAME:latest --manifest $PROJECT .
            """
          }
        }
      }
    }
    stage('docker.io login') {
      when  { branch 'master' }
      steps {
        withCredentials([string(
          credentialsId: 'dockerhub-personal',
          variable: 'CREDENTIALS')
        ]) {
          sh '''#!/bin/bash
              IFS=" " read -r username password <<<"$CREDENTIALS"
              buildah login \
              --username "$username" \
              --password-stdin <<< "$password" docker.io
            '''
        }
      }
    }
    stage('Push latest') {
      when  { branch 'master' }
      steps { sh "buildah manifest push --all $PROJECT docker://$IMAGE_NAME:latest" }
    }
    stage('Push tag') {
      when  { branch 'master' }
      steps {
        script {
          tag = sh(
            returnStdout: true,
            script: "git name-rev --name-only --tags HEAD"
          ).trim()
          if(tag == 'undefined') { return }
          sh "buildah manifest push --all $PROJECT docker://$IMAGE_NAME:$tag"
        }
      }
    }
  }
}