test.yml

on:
  push:

jobs:
  check-nightly:
    runs-on: ubuntu-latest
    outputs:
      resolver: ${{ steps.nightly.outputs.resolver }}
    steps:
      - uses: actions/checkout@v4

      - name: build with nightly
        id: nightly
        run: |
          # get the latest nightly resolver
          resolver=$(curl -s -w %{redirect_url} https://www.stackage.org/nightly | sed 's:.*/::')
          echo "resolver=$resolver" >> $GITHUB_OUTPUT
          stack build --resolver $resolver

  report-failure:
    runs-on: ubuntu-latest
    if: failure()
    needs: check-nightly
    steps:
      - uses: actions/checkout@v4
      - uses: haskell-actions/setup@v2
        with:
          enable-stack: true
          stack-version: 'latest'

      - name: Report outdated haskell dependencies
        env:
          RESOLVER: ${{ needs.check-nightly.outputs.resolver }}
        run: |
          echo ${{ env.SLACK_TOKEN }}
          # you can change 'libraries' to the channel dedicated to the library, if there is one
          # in order for a bot to be able to post messages, it must be added to the appropriate channel
          curl -XPOST https://slack.com/api/chat.postMessage \
            -H "Authorization: Bearer ${{ env.SLACK_TOKEN }}" \
            -d "channel=libraries" \
            -d "text=Repository https://github.com/${{ github.repository }} failed to build with latest nightly resolver ($RESOLVER)."