name: Check stale pull requests

on:
  workflow_dispatch:
  schedule:
    - cron: '0 12 * * *'

permissions:
  issues: read
  pull-requests: write

env:
  BEFORE_STALE: 14
  BEFORE_CLOSE: 7

jobs:
  stale:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/stale@v5
        with:
          debug-only: true
          # disable issues
          days-before-issue-stale: -1
          days-before-issue-close: -1
          stale-pr-message: |
            This pull request is stale because it has been open for ${{ env.BEFORE_STALE }} days with no activity.
            It will be closed in ${{ env.BEFORE_CLOSE }} days unless the `stale` label is removed.
          close-pr-message: |
            This pull request was closed due to a lack of activity for ${{ env.BEFORE_CLOSE }} days after it was stale.
          stale-pr-label: stale
          close-pr-label: closed-due-inactivity
          days-before-pr-stale: ${{ env.BEFORE_STALE }}
          days-before-pr-close: ${{ env.BEFORE_CLOSE }}
          exempt-pr-labels: 'external contribution'
          exempt-draft-pr: true
          exempt-all-milestones: true
          remove-stale-when-updated: true
          operations-per-run: 60