delete-orphan-translation-files.yml

name: Delete orphan translation files

# **What it does**:
#    Compares content & data files left in each translation that aren't
#    in docs-internal. Then creates a PR to delete these files.
# **Why we have it**:
#    When Juno dumps to each translation repo it can not account for the
#    fact that files in docs-internal get moved or deleted. So the
#    sum total of files constantly grows.
#    This leads to excess files in each translation repo that are not
#    ever used but has to be put into every production build.
# **Who does it impact**: Docs engineering

on:
  workflow_dispatch:
  schedule:
    - cron: '20 16 * * 1' # Run every Monday at 16:20 UTC / 8:20 PST

permissions:
  contents: write

jobs:
  delete-orphan-translation-files:
    if: github.repository == 'github/docs-internal'
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - language: zh
            language_dir: translations/zh-cn
            language_repo: github/docs-internal.zh-cn

          - language: es
            language_dir: translations/es-es
            language_repo: github/docs-internal.es-es

          - language: pt
            language_dir: translations/pt-br
            language_repo: github/docs-internal.pt-br

          - language: ru
            language_dir: translations/ru-ru
            language_repo: github/docs-internal.ru-ru

          - language: ja
            language_dir: translations/ja-jp
            language_repo: github/docs-internal.ja-jp

          - language: fr
            language_dir: translations/fr-fr
            language_repo: github/docs-internal.fr-fr

          - language: de
            language_dir: translations/de-de
            language_repo: github/docs-internal.de-de

          - language: ko
            language_dir: translations/ko-kr
            language_repo: github/docs-internal.ko-kr

    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - name: Checkout the language-specific repo
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
        with:
          repository: ${{ matrix.language_repo }}
          token: ${{ secrets.DOCS_BOT_PAT_READPUBLICKEY }}
          path: ${{ matrix.language_dir }}

      - uses: ./.github/actions/node-npm-setup

      - name: Delete orphan files
        run: |
          npm run delete-orphan-translation-files -- ${{ matrix.language_dir }}

      - name: Debug deleted files
        working-directory: ${{ matrix.language_dir }}
        run: git status

      - name: Git config
        working-directory: ${{ matrix.language_dir }}
        run: |
          git config --global user.name "docs-bot"
          git config --global user.email "77750099+docs-bot@users.noreply.github.com"

      - name: Git commit and push, create and merge PR
        working-directory: ${{ matrix.language_dir }}
        env:
          # Needed for gh
          GH_TOKEN: ${{ secrets.DOCS_BOT_PAT_READPUBLICKEY }}
        run: |
          # If nothing to commit, exit now. It's fine. No orphans.
          changes=$(git diff --name-only | wc -l)
          untracked=$(git status --untracked-files --short | wc -l)
          if [[ $changes -eq 0 ]] && [[ $untracked -eq 0 ]]; then
            echo "There are no changes to commit or untracked files. Exiting."
            exit 0
          fi

          # Create a general retry function that retries and sleeps
          retry_command() {
            local max_attempts=3
            local attempt=1

            while [ $attempt -le $max_attempts ]; do
              echo "Attempt $attempt: $@"
              "$@" && return 0
              ((attempt++))
              sleep 3 # You can adjust the sleep duration as needed
            done

            echo "Max attempts reached. Command failed after $max_attempts attempts."
            return 1
          }

          git status
          current_timestamp=$(date '+%Y-%m-%d-%H%M%S')
          branch_name="delete-orphan-files-$current_timestamp"
          git checkout -b "$branch_name"
          current_daystamp=$(date '+%Y-%m-%d')
          git commit -a -m "Delete orphan files ($current_daystamp)"
          git push origin "$branch_name"

          # Create PR
          echo "Creating pull request..."
          gh pr create \
            --title "Delete orphan files ($current_daystamp)" \
            --body '👋 humans. This PR was generated from docs-internal/.github/workflows/delete-orphan-translation-files.yml.
            ' \
            --repo "${{ matrix.language_repo }}" \
            --head=$branch_name
          echo "Merge created PR..."
          retry_command gh pr merge --merge --auto --delete-branch "$branch_name"

      - uses: ./.github/actions/slack-alert
        if: ${{ failure() && github.event_name != 'workflow_dispatch' }}
        with:
          slack_channel_id: ${{ secrets.DOCS_ALERTS_SLACK_CHANNEL_ID }}
          slack_token: ${{ secrets.SLACK_DOCS_BOT_TOKEN }}