name: Trigger nightly build

on:
  schedule:
    # * is a special character in YAML, so you have to quote this string
    - cron:  '00 15 * * *'
  workflow_dispatch:

# Only one nightly run at a time; a new run cancels a stale one.
concurrency:
  group: ${{ github.workflow }}
  cancel-in-progress: true

jobs:
  check_date:
    runs-on: ubuntu-latest
    name: Check latest commit
    outputs:
      should_run: ${{ steps.should_run.outputs.should_run }}
    steps:
      - uses: actions/checkout@v4
      - name: print latest_commit
        run: echo ${{ github.sha }}
      - id: should_run
        name: Skip if no commit in the last 24 hours
        if: ${{ github.event_name == 'schedule' }}
        run: |
          if [ "$(git rev-list --count --after='24 hours' ${{ github.sha }})" -eq 0 ]; then
            echo "should_run=false" >> $GITHUB_OUTPUT
          fi

  trigger-nightly:
    needs: check_date
    if: ${{ needs.check_date.outputs.should_run != 'false' }}
    name: Push tag for nightly build
    runs-on: ubuntu-latest
    steps:
      -
        name: 'Checkout'
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.NIGHTLY_BUILD_GH_TOKEN }}
          fetch-depth: 0
      -
        name: 'Push new tag'
        run: |
          git config user.name "${GITHUB_ACTOR}"
          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"

          # A previous release was created using a lightweight tag
          # git describe by default includes only annotated tags
          # git describe --tags includes lightweight tags as well
          DESCRIBE=`git tag -l --sort=-v:refname | grep -v nightly | head -n 1`
          MAJOR_VERSION=`echo $DESCRIBE | awk '{split($0,a,"."); print a[1]}'`
          MINOR_VERSION=`echo $DESCRIBE | awk '{split($0,a,"."); print a[2]}'`
          PATCH_VERSION=`echo $DESCRIBE | awk '{split($0,a,"."); print a[3]}'`
          PATCH_VERSION="$((${PATCH_VERSION} + 1))"
          TAG="${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}-nightly.$(date +'%Y%m%d')"
          git tag -a $TAG -m "$TAG: nightly build"
          git push origin $TAG
      - name: 'Clean up nightly releases'
        env:
          GH_TOKEN: ${{ secrets.NIGHTLY_BUILD_GH_TOKEN }}
        run: |
          # Keep the 2 most recent nightly releases; delete the rest and their tags.
          # Replaces the archived dev-drprasad/delete-older-releases action.
          gh release list --json tagName,createdAt --limit 100 \
            --jq '[.[] | select(.tagName | test("nightly"))] | sort_by(.createdAt) | reverse | .[2:] | .[].tagName' \
            | while read -r tag; do
                gh release delete "$tag" --yes --cleanup-tag || true
              done