create-pr-next-main.yaml

name: create-pr-next-main
run-name: ${{ github.actor }} is making a PR from next into main.
on:
  push:
    branches:
      - next
jobs:
  create-pr:
    name: Create PR
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: Check out repository code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: next

      - name: Check if PR already exists
        id: check-pr-exists
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          prs=$(gh pr list -B main -H next)  
          # Even when there are no PRs, this array always seems to have 1 result
          echo Size of PRS ARRAY: ${#prs[@]}
          # Locally, it seems the gh cli says 'no pull requests match your search..' but not here.
          # The first element exists but is of length 0
          echo Length of PRS[0] string: ${#prs[0]}

          if ((${#prs[@]} > 0 && ${#prs[0]} != 0 )); then
            echo skipping PR creation
            echo "skip=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Create PR
        if: '!steps.check-pr-exists.outputs.skip'
        run: gh pr create -B main -H next --title 'Merge Next into Main' --body 'Created by Github action'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}