steps:
  # Builds your Go application
  build:
    # Set your preferred Go version: 
    image: golang:1.17
    environment:
      # Needed if you want to cross-compile and package the binary in a container.
      - CGO_ENABLED=0
      # Select your target OS:
      - GOOS=linux
      # Select your target architecture:
      - GOARCH=amd64
    commands:
      - go get
      - go build

  # Runs a dryrun to build the docker container
  dryrun-docker:
    image: plugins/kaniko
    settings:
      repo: DOCKERUSERNAME/DOCKERHUBREPO
      tags: test
      dockerfile: Dockerfile
      # Just builds the container without a push to DockerHub.
      no_push: true
    when:
      event: pull_request

  # Builds and publishes a docker container to DockerHub from the main-branch
  publish-docker-latest:
    image: plugins/kaniko
    settings:
      repo: DOCKERUSERNAME/DOCKERHUBREPO
      tags: latest
      dockerfile: Dockerfile
      username:
        # Secret 'docker_username' needs to be set in the CI settings
        from_secret: docker_username
      password:
        # Secret 'docker_password' needs to be set in the CI settings
        from_secret: docker_password
    when:
      # Push new version of tag latest if new push on main-branch
      event: push
      branch: main

  # Builds and publishes a docker container of a tag
  publish-docker-tag:
    image: plugins/kaniko
    settings:
      repo: DOCKERUSERNAME/DOCKERHUBREPO
      # Uses the tag from git for the container tag
      tags: ${CI_COMMIT_TAG}
      dockerfile: Dockerfile
      username:
        # Secret 'docker_username' needs to be set in the CI settings
        from_secret: docker_username
      password:
        # Secret 'docker_password' needs to be set in the CI settings
        from_secret: docker_password
    when:
      # Push new version when version tag is created
      event: tag
      ref: refs/tags/v*