name: Release - Docker

# This workflow listens to pubished releases.
# It includes releases and pre-releases.
# It fetches the binaries, checks sha256 and GPG
# signatures, then builds an injected docker
# image and publishes it.

on:
  release:
    types:
      - published

jobs:
  docker_build_publish:
    env:
      BINARY: polkadot-parachain
      TMP: tmp
    runs-on: ubuntu-latest

    steps:
      - name: Checkout sources
        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
        with:
          ref: ${{ github.event.release.tag_name }}

      - name: Prepare temp folder
        run: |
          mkdir ${TMP}
          ls -al

      - name: Fetch files from release
        working-directory: ${{ env.TMP }}
        run: |
          echo "Repo: ${{ github.event.repository.full_name }}"

          echo "Name: ${{ github.event.release.name }}"
          echo "Tag: ${{ github.event.release.tag_name }}"
          echo "Draft: ${{ github.event.release.draft }}"
          echo "Prerelease: ${{ github.event.release.prerelease }}"
          echo "Assets: ${{ github.event.release.assets }}"

          for f in $BINARY $BINARY.asc $BINARY.sha256; do
            URL="https://github.com/${{ github.event.repository.full_name }}/releases/download/${{ github.event.release.tag_name }}/$f"
            echo " - Fetching $f from $URL"
            wget "$URL" -O "$f"
          done
          chmod a+x $BINARY
          ls -al

      - name: Check files
        working-directory: ${{ env.TMP }}
        run: |
          ls -al *$BINARY*
          shasum -a 256 -c $BINARY.sha256
          sha_result=$?

          KEY_PARITY_SEC=9D4B2B6EB8F97156D19669A9FF0812D491B96798
          KEY_CHEVDOR=2835EAF92072BC01D188AF2C4A092B93E97CE1E2
          KEYSERVER=keyserver.ubuntu.com

          gpg --keyserver $KEYSERVER --receive-keys $KEY_PARITY_SEC
          if [[ ${{ github.event.release.prerelease }} == "true" ]]; then
              gpg --keyserver $KEYSERVER --receive-keys $KEY_CHEVDOR
          fi

          gpg --verify $BINARY.asc
          gpg_result=$?

          echo sha_result: $sha_result
          echo gpg_result: $gpg_result

          # If it fails, it would fail earlier but a second check
          # does not hurt in case of refactoring...
          if [[ $sha_result -ne 0 || $gpg_result -ne 0 ]]; then
            echo "Check failed, exiting with error"
            exit 1
          else
            echo "Checks passed"
          fi

      - name: Build injected image
        env:
          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
          DOCKERHUB_ORG: parity
        run: |
          export OWNER=$DOCKERHUB_ORG
          mkdir -p target/release
          cp -f ${TMP}/$BINARY* target/release/
          ./docker/scripts/build-injected-image.sh

      - name: Login to Dockerhub
        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Tag and Publish
        env:
          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
          DOCKERHUB_ORG: parity
        run: |
          docker run --pull never --rm $DOCKERHUB_ORG/$BINARY --version
          VERSION=$(docker run --pull never --rm $DOCKERHUB_ORG/$BINARY --version | awk '{ print $2 }' )
          SEMVER=$( echo $VERSION | cut -f1 -d- )
          GITREF=$( echo $VERSION | cut -f2 -d- )
          PRE=${{ github.event.release.prerelease }}
          PRE_STR=""

          echo "SEMVER=$SEMVER"
          echo "GITREF=$GITREF"
          echo "PRE=$PRE"

          # Build a tag such as:
          # 1.2.3-8a1201273 or
          # 1.2.3-pre-8a1201273 for pre-releases
          [[ $PRE == "true" ]] && PRE_STR="-pre"
          TAG=${SEMVER}${PRE_STR}-${GITREF}
          echo "PRE_STR=$PRE_STR"
          echo "TAG=$TAG"

          docker tag $DOCKERHUB_ORG/$BINARY $DOCKERHUB_ORG/$BINARY:$TAG
          docker push $DOCKERHUB_ORG/$BINARY:$TAG

          if [[ $PRE != "true" ]]; then
            docker tag $DOCKERHUB_ORG/$BINARY $DOCKERHUB_ORG/$BINARY:latest
            docker tag $DOCKERHUB_ORG/$BINARY $DOCKERHUB_ORG/$BINARY:$SEMVER

            docker push $DOCKERHUB_ORG/$BINARY:latest
            docker push $DOCKERHUB_ORG/$BINARY:$SEMVER
          fi

          docker images | grep $DOCKERHUB_ORG/$BINARY