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"
    }
    stages {
        stage("Pre-build") {
            steps{
                checkout scm

                // Define a variable that stores the output of the git describe --tags --long command
                def gitTag = sh (returnStdout: true, script: 'git describe --tags --long').trim()
                // Define a variable that stores the output of the git rev-parse HEAD command
                def commitHash = sh (returnStdout: true, script: 'git rev-parse HEAD').trim()
                // Define a variable that stores the output of the git rev-parse --abbrev-ref HEAD command
                def branchName = sh (returnStdout: true, script: 'git rev-parse --abbrev-ref HEAD').trim()
                // Define a variable that stores the image tag based on the git tag and branch name
                def imageTag = ''
                // Check if the git tag exists
                if (gitTag) {
                    // Split the git tag by - and .
                    def parts = gitTag.split(/[-.]/)
                    // Loop through the parts and append them to the image tag with a comma
                    for (int i = 0; i < parts.size(); i++) {
                        imageTag += parts[i]
                        if (i < parts.size() - 1) {
                            imageTag += ','
                        }
                    }
                } else {
                    // Use the commit hash as the image tag
                    imageTag = commitHash
                }
                // Check if the branch name is main or master
                if (branchName == 'main' || branchName == 'master') {
                    // Append the latest tag to the image tag with a comma
                    imageTag += ',latest'
                }
            }
        }
        
        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 $IMAGE_PUSH_DESTINATION --force --build-arg=IMAGE_TAG=$imageTag
                        '''
                    }
                }
            }
        }
    }
}