name: Daily Release

on:
  schedule:
    # Run at 00:30 UTC every day
    - cron: '30 0 * * *'
  # Allow manual triggering for testing
  workflow_dispatch:

jobs:
  update-compatibility-date:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          token: ${{ secrets.DEVPROD_PAT }}
          ref: main

      - name: Get current date
        id: date
        run: |
          echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
          echo "max_date=$(date -d '+7 days' +'%Y-%m-%d')" >> $GITHUB_OUTPUT

      - name: Update compatibility dates
        run: |
          echo "${{ steps.date.outputs.date }}" > src/workerd/io/release-version.txt
          echo "${{ steps.date.outputs.max_date }}" > src/workerd/io/maximum-compatibility-date.txt

      - name: Check for changes
        id: git-check
        run: |
          if [[ $(git status --porcelain src/workerd/io/release-version.txt src/workerd/io/maximum-compatibility-date.txt) ]]; then
            echo "changed=true" >> $GITHUB_OUTPUT
          else
            echo "changed=false" >> $GITHUB_OUTPUT
          fi
          if [[ $(git show --format="%ae" -s) == "workers-devprod@cloudflare.com" ]] && \
             [[ $(git diff-tree --no-commit-id --name-only -r HEAD -- src/workerd/io/release-version.txt) ]]; then
            echo "last_commit_is_daily_release=true" >> $GITHUB_OUTPUT
          else
            echo "last_commit_is_daily_release=false" >> $GITHUB_OUTPUT
          fi

      # Publish new version if compatibility-date changed and the last commit wasn't already
      # an automated daily release.
      - name: Commit and push change
        if: steps.git-check.outputs.changed == 'true' && steps.git-check.outputs.last_commit_is_daily_release != 'true'
        run: |
          git config user.email "workers-devprod@cloudflare.com"
          git config user.name "Workers DevProd"
          git add src/workerd/io/release-version.txt src/workerd/io/maximum-compatibility-date.txt
          git commit -m "Release ${{ steps.date.outputs.date }}"
          git push