drone/.drone.yml

---
kind: pipeline
type: docker
name: check
trigger:
  event:
    - cron
  cron:
    - weekly-update-check

steps:
  - name: check
    image: docker:latest
    volumes:
      - name: docker-socket
        path: /var/run/docker.sock
    environment:
      DRONE_API_TOKEN:
        from_secret: drone_api_token
      REGISTRY_PWD:
        from_secret: registry_pwd
    commands:
      - apk add git curl jq
      - echo "Checking for new server version"
      # collect info from upstream repository
      - git clone https://github.com/drone/drone.git
      - cd drone
      - LATEST_VERSION=$(git tag --sort v:refname | grep '^v[0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}$' | tail -n 1)
      - git checkout $LATEST_VERSION
      - COMMIT_HASH=$(git log -n 1 --pretty=%H)
      # collect info from current image
      - echo $REGISTRY_PWD | docker login -u drone --password-stdin registry.jfmonty2.com
      - docker pull registry.jfmonty2.com/drone-server:latest
      - IMAGE_COMMIT_HASH=$(docker image inspect -f '{{ .Config.Labels.drone_commit_hash }}' registry.jfmonty2.com/drone-server:latest)
      # compare and trigger CI if necessary
      - |
        if [[ $COMMIT_HASH != $IMAGE_COMMIT_HASH ]]; then
          echo 'Updates available, triggering server build.'
          curl -X POST -H "Authorization: Bearer $DRONE_API_TOKEN" \
          https://drone.jfmonty2.com/api/repos/jfmonty2/drone/builds/$DRONE_BUILD_NUMBER/promote?target=staging
        else
          echo 'Image is already up to date.'
        fi

volumes:
  - name: docker-socket
    host:
      path: /var/run/docker.sock


---
kind: pipeline
type: docker
name: server

trigger:
  event:
    - promote
  target:
    - staging

steps:
  - name: prepare
    image: docker:latest
    volumes:
      - name: docker-socket
        path: /var/run/docker.sock
    commands:
      - echo 'http://dl-cdn.alpinelinux.org/alpine/edge/community' >> /etc/apk/repositories
      - apk update
      - apk add git yq
      - git clone https://github.com/drone/drone.git
      - cd drone
      - LATEST_VERSION=$(git tag --sort v:refname | grep '^v[0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}$' | tail -n 1)
      - git checkout $LATEST_VERSION
      - printf $(git log -n 1 --pretty=%H) > ../commit_hash # we'll need this for the docker build
      - GOLANG_IMG=$(yq read .drone.yml 'steps[0].image')
      - docker pull $GOLANG_IMG
      - docker tag $GOLANG_IMG drone-builder:latest
      - docker image rm $GOLANG_IMG
  
  - name: compile
    image: drone-builder:latest
    pull: never
    environment:
      GOARCH: amd64
      GOOS: linux
    commands:
      - cd drone
      - >
        go build -ldflags "-extldflags \"-static\""
        -tags nolimit
        -o release/linux/amd64/drone-server
        github.com/drone/drone/cmd/drone-server

  - name: docker-build
    image: docker:latest
    volumes: 
      - name: docker-socket
        path: /var/run/docker.sock
    commands:
      - cd drone
      - rm .dockerignore
      - >
        docker build 
        -f docker/Dockerfile.server.linux.amd64
        -t registry.jfmonty2.com/drone-server:latest 
        --label drone_commit_hash=$(cat ../commit_hash)
        .

  - name: deploy
    image: docker:latest
    volumes:
      - name: docker-socket
        path: /var/run/docker.sock
    environment:
      REGISTRY_PWD: 
        from_secret: registry_pwd
    commands:
      - echo $REGISTRY_PWD | docker login -u drone --password-stdin registry.jfmonty2.com
      - docker push registry.jfmonty2.com/drone-server:latest


volumes:
  - name: docker-socket
    host:
      path: /var/run/docker.sock