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# To contribute improvements to CI/CD templates, please follow the Development guide at:
# https://docs.gitlab.com/ee/development/cicd/templates.html
# This specific template is located at:
# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Kaniko.gitlab-ci.yml

# Build and publish a tag/branch to Gitlab Docker Registry using Kaniko and Gitlab Docker executor.
# Kaniko can build Docker images without using Docker-In-Docker and it's permission
# drawbacks. No additional configuration required.
kaniko-build:
  variables:
    # Additional options for Kaniko executor.
    # For more details see https://github.com/GoogleContainerTools/kaniko/blob/master/README.md#additional-flags
    KANIKO_ARGS: ""
  stage: build
  image:
    # For latest releases see https://github.com/GoogleContainerTools/kaniko/releases
    # Only debug/*-debug versions of the Kaniko image are known to work within Gitlab CI
    name: gcr.io/kaniko-project/executor:debug
    entrypoint: [""]
  script:
    # Compose docker tag name
    # Git Branch/Tag to Docker Image Tag Mapping
    #   * Default Branch: main -> latest
    #   * Branch: feature/my-feature -> branch-feature-my-feature
    #   * Tag: v1.0.0/beta2 -> v1.0.0-beta2
    - |
      if [ "$CI_COMMIT_REF_NAME" = $CI_DEFAULT_BRANCH ]; then
        VERSION="latest"
      elif [ -n "$CI_COMMIT_TAG" ];then
        NOSLASH=$(echo "$CI_COMMIT_TAG" | tr -s / - )
        SANITIZED="${NOSLASH//[^a-zA-Z0-9\-\.]/}"
        VERSION="$SANITIZED"
      else \
        NOSLASH=$(echo "$CI_COMMIT_REF_NAME" | tr -s / - )
        SANITIZED="${NOSLASH//[^a-zA-Z0-9\-]/}"
        VERSION="branch-$SANITIZED"
      fi
    - echo $VERSION
    - mkdir -p /kaniko/.docker
    # Write credentials to access Gitlab Container Registry within the runner/ci
    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"auth\":\"$(echo -n ${CI_REGISTRY_USER}:${CI_REGISTRY_PASSWORD} | base64 | tr -d '\n')\"}}}" > /kaniko/.docker/config.json
    # Build and push the container. To disable push add --no-push
    - /kaniko/executor --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --destination $CI_REGISTRY_IMAGE:$VERSION $KANIKO_ARGS
  # Run this job in a branch/tag where a Dockerfile exists
  rules:
    - exists:
        - Dockerfile