name: 'Orphaned assets check'

# **What it does**: Checks that there are no files in ./assets/ that aren't mentioned in any source file.
# **Why we have it**: To avoid orphans into the repo.
# **Who does it impact**: Docs content.

on:
  workflow_dispatch:
  schedule:
    - cron: '13 10 * * *' # Once a day at 10:13 UTC

permissions:
  contents: read

jobs:
  orphaned-assets-check:
    if: ${{ github.repository == 'github/docs-internal' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@dcd71f646680f2efd8db4afa5ad64fdcba30e748
        with:
          # Using a PAT is necessary so that the new commit will trigger the
          # CI in the PR. (Events from GITHUB_TOKEN don't trigger new workflows.)
          token: ${{ secrets.DOCUBOT_REPO_PAT }}

      - name: Setup node
        uses: actions/setup-node@17f8bd926464a1afa4c6a11669539e9c1ba77048
        with:
          node-version: '16.15.0'
          cache: npm

      - name: Install
        run: npm ci

      - name: Check for orphaned assets
        env:
          # Needed for gh
          GITHUB_TOKEN: ${{ secrets.DOCUBOT_REPO_PAT }}
        run: |
          set -e

          ./script/find-orphaned-assets.js | xargs git rm

          # If nothing to commit, exit now. It's fine. No orphans.
          git status | grep 'nothing to commit' && exit 0

          # Replicated from the translation pipeline PR-maker Action
          git config --global user.name "docubot"
          git config --global user.email "67483024+docubot@users.noreply.github.com"

          date=$(date '+%Y-%m-%d-%H-%M')
          branchname=orphaned-assets-$date-$GITHUB_RUN_ID

          git checkout -b $branchname
          git commit -m "Delete orphaned assets $date"
          git push origin $branchname

          gh pr create \
            --title "Delete orphaned assets ($date)" \
            --body "Found with the find-orphaned-assets.js script" \
            --repo github/docs-internal \
            --label docs-content-fr