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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

env:
  DOCKERHUB_REPO: openthread/environment

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-24.04
          - platform: linux/arm64
            runner: ubuntu-24.04-arm

    runs-on: ${{ matrix.runner }}

    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
        with:
          egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs

      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          submodules: true

      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.DOCKERHUB_REPO }}

      - name: Login to Docker Hub
        if: success() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0

      - name: Build and push by digest
        if: success()
        id: build
        uses: docker/build-push-action@v6
        with:
          file: etc/docker/environment/Dockerfile
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,"name=${{ env.DOCKERHUB_REPO }}",push-by-digest=true,name-canonical=true
          push: ${{ github.repository == 'openthread/openthread' && github.event_name != 'pull_request' }}

      - name: Export digest
        if: success() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
        run: |
          mkdir -p ${{ runner.temp }}/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${digest#sha256:}"

      - name: Upload digest
        if: success() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    if: success() && github.repository == 'openthread/openthread' && github.event_name != 'pull_request'
    runs-on: ubuntu-latest
    needs:
      - build
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
        with:
          egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs

      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digests-*
          merge-multiple: true

      - name: Login to Docker Hub
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.DOCKERHUB_REPO }}
          tags: |
            type=ref,event=branch
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Create manifest list and push
        working-directory: ${{ runner.temp }}/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.DOCKERHUB_REPO }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.DOCKERHUB_REPO }}:${{ steps.meta.outputs.version }}