[ci] feat: add linting stage

---

variables:

  DOCKER_DRIVER: "overlay2"

  DOCKER_HOST: "tcp://localhost:2375/"

  DOCKER_TLS_CERTDIR: ""

stages:

  - "build"

build image:

  stage: "build"

  image: "docker:27.3.1"

  services:

    - name: "docker:27.3.1-dind"

      command: ["--tls=false"]

  script:

    # login to container registry

    - echo "$CR_PASSWORD" | docker login $CR_HOSTNAME -u $CR_USERNAME --password-stdin

    # build observium-pe image

    - "docker build -t roundcube -f Dockerfile.linux.amd64 ."

    # add tags to image

    - "docker image tag roundcube cr.simoncor.net/siempie/roundcube:latest"

    # push image to dockerhub.

    - "docker push --all-tags cr.simoncor.net/siempie/roundcube"

    # logout from container registry

    - "docker logout $CR_HOSTNAME"

---

# linting

linting:

  stage: "linting"

  image:

    name: "cr.simoncor.net/siempie/ansible-deployment:latest"

    entrypoint: ["/bin/sh", "-c"]

  rules:

    # run only on push to default branch

    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'

    - when: "never"

  # start linting

  script:

    - "yamllint ."