# Adds labels to pull requests for the type of change the PR makes
name: meta(labels)

on:
  pull_request_target:

jobs:
  label-pullrequest:
    permissions:
      contents: read
      pull-requests: write
    name: labels pull requests (frontend / backend)
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8  # v3.1.0
        with:
          persist-credentials: false

      - name: Check for file changes
        uses: getsentry/paths-filter@4512585405083f25c027a35db413c2b3b9006d50  # v2.11.1
        id: changes
        with:
          token: ${{ github.token }}
          filters: .github/file-filters.yml

      - name: Add frontend label
        uses: actions-ecosystem/action-add-labels@18f1af5e3544586314bbe15c0273249c770b2daf
        if: steps.changes.outputs.frontend_src == 'true'
        with:
          labels: 'Scope: Frontend'

      - name: Add backend label
        uses: actions-ecosystem/action-add-labels@18f1af5e3544586314bbe15c0273249c770b2daf
        if: steps.changes.outputs.backend_src == 'true'
        with:
          labels: 'Scope: Backend'

      - name: Find previous frontend/backend warning comment
        uses: peter-evans/find-comment@1769778a0c5bd330272d749d12c036d65e70d39d
        id: fc
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: '<!-- FRONTEND_BACKEND_WARNING -->'

      - name: Add frontend/backend warning comment
        uses: peter-evans/create-or-update-comment@b95e16d2859ad843a14218d1028da5b2c4cbc4b4
        if: >
          steps.changes.outputs.frontend_src == 'true' &&
          steps.changes.outputs.backend_src == 'true' &&
          steps.fc.outputs.comment-id == 0
        with:
          issue-number: ${{ github.event.pull_request.number }}
          body: >
            <!-- FRONTEND_BACKEND_WARNING -->

            🚨 **Warning:** This pull request contains Frontend and Backend changes!


            It's discouraged to make changes to Sentry's Frontend and Backend
            in a single pull request. The Frontend and Backend are **not**
            atomically deployed. If the changes are interdependent of each
            other, they **must** be separated into two pull requests and be made
            forward or backwards compatible, such that the Backend or Frontend
            can be safely deployed independently.


            Have questions? Please ask in the [`#discuss-dev-infra`
            channel](https://app.slack.com/client/T024ZCV9U/CTJL7358X).