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name: Docker

on:
  push:
    branches-ignore:
      - 'dependabot/**'
  pull_request:
    branches:
      - 'main'

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || (github.repository == 'openthread/openthread' && github.run_id) || github.ref }}
  cancel-in-progress: true

permissions:  # added using https://github.com/step-security/secure-workflows
  contents: read

jobs:

  buildx:
    name: buildx-${{ matrix.docker_name }}
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        include:
          - docker_name: environment
    steps:
    - name: Harden Runner
      uses: step-security/harden-runner@6b3083af2869dc3314a0257a42f4af696cc79ba3 # v2.3.1
      with:
        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs

    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
      with:
        submodules: true

    - name: Prepare
      id: prepare
      run: |
        DOCKER_IMAGE=openthread/${{ matrix.docker_name }}
        DOCKER_FILE=etc/docker/${{ matrix.docker_name }}/Dockerfile
        DOCKER_PLATFORMS=linux/amd64
        VERSION=latest

        TAGS="--tag ${DOCKER_IMAGE}:${VERSION}"

        echo "docker_image=${DOCKER_IMAGE}" >> $GITHUB_OUTPUT
        echo "version=${VERSION}" >> $GITHUB_OUTPUT
        echo "buildx_args=--platform ${DOCKER_PLATFORMS} \
          --build-arg OT_GIT_REF=${{ github.sha }} \
          --build-arg VERSION=${VERSION} \
          --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') \
          --build-arg VCS_REF=${GITHUB_SHA::8} \
          ${TAGS} --file ${DOCKER_FILE} ." >> $GITHUB_OUTPUT

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@4b4e9c3e2d4531116a6f8ba8e71fc6e2cb6e6c8c # v2.5.0

    - name: Docker Buildx (build)
      run: |
        docker buildx build --output "type=image,push=false" ${{ steps.prepare.outputs.buildx_args }}

    - name: Login to DockerHub
      if: success() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
      uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_PASSWORD }}

    - name: Docker Buildx (push)
      if: success() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
      run: |
        docker buildx build --output "type=image,push=true" ${{ steps.prepare.outputs.buildx_args }}

    - name: Inspect Image
      if: always() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
      run: |
        docker buildx imagetools inspect ${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}
