pipeline {
    agent {
        kubernetes {
            defaultContainer 'kaniko'
            yaml """
apiVersion: v1
kind: Pod
metadata:
  name: kaniko
spec:
  containers:
  - name: kaniko
    image: gcr.io/kaniko-project/executor:v1.5.1-debug
    imagePullPolicy: Always
    command:
    - /busybox/cat
    tty: true
    volumeMounts:
      - name: jenkins-docker-cfg
        mountPath: /kaniko/.docker
  volumes:
  - name: jenkins-docker-cfg
    projected:
      sources:
      - secret:
          name: docker-credentials
          items:
            - key: data
              path: config.json
"""
        }
    }
    environment {
        IMAGE_PUSH_DESTINATION="ghcr.io/ruakij/routingtabletowg"
        IMAGE_TAG=""
    }
    stages {
        stage("Pre-build") {
            steps {
                checkout scm

                script {

                    version = sh (returnStdout: true, script: 'git describe --tags --long').trim()
                    commitHash = sh (returnStdout: true, script: 'git rev-parse HEAD').trim()
                    
                    if (version) {
                        def parts = version.split(/[-.]/)
                        for (int i = 0; i < parts.size(); i++) {
                            IMAGE_TAG += parts[i]
                            if (i < parts.size() - 1) {
                                IMAGE_TAG += ','
                            }
                        }
                    } else {
                        IMAGE_TAG = commitHash
                    }

                    if ($GIT_BRANCH == 'main') {
                        IMAGE_TAG += ',latest'
                    } else {
                        IMAGE_TAG += ','$GIT_BRANCH
                    }
                }
            }
        }
        
        stage('Build with Kaniko') {
            steps {
                container(name: 'kaniko', shell: '/busybox/sh') {
                    withEnv(['PATH+EXTRA=/busybox']) {
                        // Use the image tag variable as part of the image name when you build and push the image with kaniko
                        sh '''#!/busybox/sh
                            /kaniko/executor --context `pwd` --destination $IMAGE_PUSH_DESTINATION --force --build-arg=IMAGE_TAG=$IMAGE_TAG
                        '''
                    }
                }
            }
        }
    }
}