name: CI
on:
  # Trigger on open, synchronize or reopen PR activity against the default base branch
  pull_request:
    branches: [ "master" ]
jobs:
  Validate-Metadata:
    runs-on: ubuntu-latest
    steps:
      # Checkout both this pull request and the master branch
      - name: Checkout pull request
        uses: actions/checkout@v2.3.4
        with:
          path: pull-request

      - name: Checkout base branch
        uses: actions/checkout@v2
        with:
          ref: master
          path: master

      - name: Validate
        run: |
          # shellcheck disable=SC2016
          # Debug:
          # env
          # cat "${GITHUB_EVENT_PATH}" | jq .
          export BASE="master"
          export LOCATION="mappings"

          pushd pull-request
          echo "Fetching base branch '${BASE}':"
          git fetch origin ${BASE} --depth=1
          echo

          echo "Obtaining PR file change diff:"
          echo "BASE: ${BASE}"
          echo
          git --no-pager diff --name-status origin/"${BASE}" HEAD > "HEAD.diff"
          cat "HEAD.diff"
          echo

          rm -f fail-location fail-filename || :
          echo "Validating all changed PR files are in the ${LOCATION} directory:"
          echo
          awk '{print $2}' "HEAD.diff" | sort \
            | xargs -I{} bash -c '[[ {} =~ ^${LOCATION}/.*$ ]] && echo "pass: {}" || { echo "FAIL: {}"; touch fail-location; }'
          echo

          [ -f "fail-location" ] && echo "ABORTING: File change location validation failed"
          [ -f "fail-filename" ] && echo "ABORTING: File name validation failed"
          [ -f "fail-location" ] || [ -f "fail-filename" ] && exit 1

          popd
          echo "Obtaining the latest metadata GitHub PR validation tool:"
          echo "curl -sLO https://hydra.iohk.io/job/Cardano/offchain-metadata-tools/musl64.metadata-validator-github-tarball.x86_64-linux/latest/download/1/metadata-validator-github.tar.gz"
          curl -sLO https://hydra.iohk.io/job/Cardano/offchain-metadata-tools/musl64.metadata-validator-github-tarball.x86_64-linux/latest/download/1/metadata-validator-github.tar.gz
          echo

          echo "Extracting the latest metadata GitHub PR validation tool:"
          tar -zxvf metadata-validator-github.tar.gz
          echo

          echo "Running the metadata GitHub PR validator on this PR:"
          echo
          echo "./metadata-validator-github "${GITHUB_REPOSITORY_OWNER}" "$(cat "${GITHUB_EVENT_PATH}" | jq -r '.repository.name')" "${{ github.event.number }}" --expect-branch "${BASE}" --no-auth"
          ./metadata-validator-github "${GITHUB_REPOSITORY_OWNER}" "$(cat "${GITHUB_EVENT_PATH}" | jq -r '.repository.name')" "${{ github.event.number }}" --expect-branch "${BASE}" --no-auth
          echo

          echo "Obtaining the latest metadata validation tool:"
          echo "curl -sLO https://hydra.iohk.io/job/Cardano/offchain-metadata-tools/musl64.token-metadata-creator-tarball.x86_64-linux/latest/download/1/token-metadata-creator.tar.gz"
          curl -sLO https://hydra.iohk.io/job/Cardano/offchain-metadata-tools/musl64.token-metadata-creator-tarball.x86_64-linux/latest/download/1/token-metadata-creator.tar.gz
          echo

          echo "Extracting the latest metadata validation tool:"
          tar -zxvf token-metadata-creator.tar.gz
          echo

          echo "Running the metadata validation tool on this PR:"
          echo
          VALIDATOR="./token-metadata-creator validate"
          awk '/^M/ {print $2}' "pull-request/HEAD.diff" | xargs --no-run-if-empty -- bash -c 'echo "$1 master/$2 pull-request/$2" && $1 master/$2 pull-request/$2' -- "$VALIDATOR"
          awk '/^A/ {print $2}' "pull-request/HEAD.diff" | xargs --no-run-if-empty -- bash -c 'echo "$1 pull-request/$2" && $1 pull-request/$2' -- "$VALIDATOR"
          echo