name: sync-dev-to-vX.Y-dev

# author: @ralfhandl

#
# This workflow creates PRs to update the vX.Y-dev branch with the latest changes from dev
#

# run this on push to dev
on:
  push:
    branches:
      - dev
  workflow_dispatch: {}

jobs:
  sync-branches:
    if: github.repository == 'OAI/OpenAPI-Specification'
    runs-on: ubuntu-latest
    steps:
      - name: Generate access token
        id: generate-token
        uses: actions/create-github-app-token@v2
        with:
          app-id: ${{ secrets.OAI_SPEC_PUBLISHER_APPID }}
          private-key: ${{ secrets.OAI_SPEC_PUBLISHER_PRIVATE_KEY }}

      - name: Checkout repository
        uses: actions/checkout@v5
        with:
          fetch-depth: 0
          token: ${{ steps.generate-token.outputs.token }}

      - name: Create pull requests
        id: pull_requests
        shell: bash
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

          DEV_BRANCHES=$(git branch -r --list origin/v?.?-dev)
          for DEV_BRANCH in $DEV_BRANCHES; do
            BASE=${DEV_BRANCH:7}
            SYNC="$BASE-sync-with-$HEAD"
            
            git checkout -b $SYNC origin/$SYNC || git checkout -b $SYNC origin/$BASE
            git merge origin/$HEAD -m "Merge $HEAD into $SYNC"
            git checkout origin/$BASE src/*
            git checkout origin/$BASE tests/*
            git commit -m "Restored src/* and tests/*" || echo ""
            git push -u origin $SYNC

            EXISTS=$(gh pr list --base $BASE --head $SYNC \
              --json number --jq '.[] | .number')
            if [ ! -z "$EXISTS" ]; then
              echo "PR #$EXISTS already wants to merge $SYNC into $BASE"
              continue
            fi

            PR=$(gh pr create --base $BASE --head $SYNC \
              --label "Housekeeping" \
              --title "$BASE: sync with $HEAD" \
              --body "Merge relevant changes from \`$HEAD\` into \`$BASE\`.")
            echo ""
            echo "PR to sync $BASE with $HEAD: $PR"
            sleep 10 # allow status checks to be triggered
            
            gh pr checks $PR --watch --required || continue
            gh pr merge $PR --merge --admin
          done
        env:
          GH_TOKEN: ${{ steps.generate-token.outputs.token }}
          HEAD: dev