diff-checker.yml

name: diff checker

on:
  schedule:
    - cron: '0 23 * * *'

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: 1.23

      - name: Check diff
        id: check-diff
        run: |
          GOBIN=${PWD}/bin go install github.com/suntong/html2md@v1.5.0
          curl https://go.dev/doc/faq | ./bin/html2md -i -G | sed -n -e 131,2411p > original.md
          echo "diff=$(git diff --name-only original.md | wc -l | xargs )" >> $GITHUB_OUTPUT

      - name: Create a PR if diff exists
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        if: ${{ steps.check-diff.outputs.diff != 0 }}
        run: |
          git config user.name ${GITHUB_ACTOR}
          git config user.email ${GITHUB_ACTOR}@users.noreply.github.com
          branch=feature/diff-$(TZ=JST-9 date +'%Y-%m-%d')
          git switch -c ${branch}
          git add original.md
          git commit --message "update diff"
          git push origin ${branch}

          pr_number=$(gh pr list --search "Update site info in:title" --json number --jq '.[0].number')
          if [ ! -z "$pr_number" ]; then
            echo "Closing PR #$pr_number from yesterday"
            gh pr close $pr_number --comment "Closing in favor of a new PR"
          fi

          gh pr create -B main -t "[$(date +'%Y-%m-%d')] Update site info" --body "Check the diff content"