pipeline {
  agent {
    kubernetes {
      label 'metis'
      defaultContainer 'builder'
      yaml """
apiVersion: v1
kind: Pod
metadata:
  labels:
    app: metis
spec:
  nodeSelector:
    kubernetes.io/arch: arm64
    node-role.kubernetes.io/worker: "true"
  imagePullSecrets:
    - name: harbor-robot-pipeline
  containers:
    - name: dind
      image: docker:27-dind
      securityContext:
        privileged: true
      env:
        - name: DOCKER_TLS_CERTDIR
          value: ""
      args:
        - --mtu=1400
        - --host=unix:///var/run/docker.sock
        - --host=tcp://0.0.0.0:2375
        - --tls=false
      volumeMounts:
        - name: dind-storage
          mountPath: /var/lib/docker
    - name: builder
      image: docker:27
      command: ["cat"]
      tty: true
      env:
        - name: DOCKER_HOST
          value: tcp://localhost:2375
        - name: DOCKER_TLS_CERTDIR
          value: ""
        - name: DOCKER_CONFIG
          value: /root/.docker
      volumeMounts:
        - name: workspace-volume
          mountPath: /home/jenkins/agent
        - name: docker-config-writable
          mountPath: /root/.docker
        - name: harbor-config
          mountPath: /docker-config
    - name: tester
      image: golang:1.23-bookworm
      command: ["cat"]
      tty: true
      volumeMounts:
        - name: workspace-volume
          mountPath: /home/jenkins/agent
    - name: publisher
      image: python:3.12-slim
      command: ["cat"]
      tty: true
      volumeMounts:
        - name: workspace-volume
          mountPath: /home/jenkins/agent
  volumes:
    - name: workspace-volume
      emptyDir: {}
    - name: docker-config-writable
      emptyDir: {}
    - name: dind-storage
      emptyDir: {}
    - name: harbor-config
      secret:
        secretName: harbor-robot-pipeline
        items:
          - key: .dockerconfigjson
            path: config.json
"""
    }
  }
  environment {
    REGISTRY = 'registry.bstein.dev/bstein'
    IMAGE = "${REGISTRY}/metis"
    SENTINEL_IMAGE = "${REGISTRY}/metis-sentinel"
    VERSION_TAG = 'dev'
    SEMVER = 'dev'
    COVERAGE_JSON = 'build/coverage.json'
    JUNIT_XML = 'build/junit.xml'
    TEST_EXIT_CODE_PATH = 'build/test.exitcode'
    SUITE_NAME = 'metis'
    PUSHGATEWAY_URL = 'http://platform-quality-gateway.monitoring.svc.cluster.local:9091'
  }
  options {
    disableConcurrentBuilds()
  }
  triggers {
    pollSCM('H/5 * * * *')
  }
  stages {
    stage('Checkout') {
      steps {
        checkout scm
      }
    }

    stage('Unit tests') {
      steps {
        container('tester') {
          sh '''
            set -eu
            apt-get update >/dev/null
            apt-get install -y --no-install-recommends xz-utils >/dev/null
            mkdir -p build
            go install github.com/jstemmer/go-junit-report/v2@latest
            set +e
            go test -v -coverprofile=build/coverage.out ./... > build/test.out 2>&1
            test_rc=$?
            set -e
            printf '%s\n' "${test_rc}" > "${TEST_EXIT_CODE_PATH}"
            cat build/test.out
            "$(go env GOPATH)/bin/go-junit-report" < build/test.out > "${JUNIT_XML}"
            coverage="0"
            if [ -f build/coverage.out ]; then
              coverage="$(go tool cover -func=build/coverage.out | awk '/^total:/ {gsub("%","",$3); print $3}')"
            fi
            export GO_COVERAGE="${coverage}"
            printf '{"summary":{"percent_covered":%s}}\n' "${GO_COVERAGE}" > "${COVERAGE_JSON}"
          '''
        }
      }
    }

    stage('Publish test metrics') {
      steps {
        container('publisher') {
          sh '''
            set -eu
            python scripts/publish_test_metrics.py
          '''
        }
      }
    }

    stage('Enforce test result') {
      steps {
        container('tester') {
          sh '''
            set -eu
            test_rc="$(cat "${TEST_EXIT_CODE_PATH}")"
            exit "${test_rc}"
          '''
        }
      }
    }

    stage('Prep toolchain') {
      steps {
        container('builder') {
          sh '''
            set -eu
            mkdir -p /root/.docker
            cp /docker-config/config.json /root/.docker/config.json
          '''
        }
      }
    }

    stage('Compute version') {
      steps {
        container('builder') {
          script {
            sh '''
              set -eu
              SEMVER="0.1.0-${BUILD_NUMBER}"
              echo "SEMVER=${SEMVER}" > build.env
            '''
            def props = readProperties file: 'build.env'
            env.SEMVER = props['SEMVER'] ?: "0.1.0-${env.BUILD_NUMBER}"
            env.VERSION_TAG = env.SEMVER
          }
        }
      }
    }

    stage('Buildx setup') {
      steps {
        container('builder') {
          sh '''
            set -eu
            ready=0
            for i in $(seq 1 90); do
              if docker info >/dev/null 2>&1; then
                ready=1
                break
              fi
              sleep 2
            done
            if [ "${ready}" -ne 1 ]; then
              echo "docker daemon did not become ready on ${DOCKER_HOST}"
              docker version || true
              exit 1
            fi
            docker run --privileged --rm tonistiigi/binfmt --install amd64,arm64
            BUILDER_NAME="metis-builder-${BUILD_NUMBER}"
            docker buildx rm "${BUILDER_NAME}" >/dev/null 2>&1 || true
            docker buildx create --name "${BUILDER_NAME}" --driver docker-container --use
            docker buildx inspect "${BUILDER_NAME}" --bootstrap
          '''
        }
      }
    }

    stage('Build & push images') {
      steps {
        container('builder') {
          sh '''
            set -eu
            VERSION_TAG="$(cut -d= -f2 build.env)"
            docker info >/dev/null
            for arch in amd64 arm64; do
              docker buildx build \
                --platform "linux/${arch}" \
                --build-arg TARGETOS=linux \
                --build-arg TARGETARCH="${arch}" \
                --tag "${IMAGE}:${VERSION_TAG}-${arch}" \
                --tag "${IMAGE}:latest-${arch}" \
                --target runtime \
                --push \
                .
              docker buildx build \
                --platform "linux/${arch}" \
                --build-arg TARGETOS=linux \
                --build-arg TARGETARCH="${arch}" \
                --tag "${SENTINEL_IMAGE}:${VERSION_TAG}-${arch}" \
                --tag "${SENTINEL_IMAGE}:latest-${arch}" \
                --target sentinel \
                --push \
                .
            done
          '''
        }
      }
    }
  }
  post {
    always {
      script {
        if (fileExists('build/junit.xml')) {
          try {
            junit allowEmptyResults: true, testResults: 'build/junit.xml'
          } catch (Throwable err) {
            echo "junit step unavailable: ${err.class.simpleName}"
          }
        }
      }
      archiveArtifacts artifacts: 'build/junit.xml,build/coverage.json,build/coverage.out', allowEmptyArchive: true, fingerprint: true
    }
  }
}