name: Weblate Merge PO

permissions:
  # it merges the updated translations and creates a pull request with the changes
  contents: write
  pull-requests: write

on:
  schedule:
    # run every Monday at 2:42AM UTC
    - cron: "42 2 * * Mon"

  # allow running manually
  workflow_dispatch:

jobs:
  merge-po:
    # allow pushing and creating pull requests
    permissions:
      contents: write
      pull-requests: write

    # do not run in forks
    if: ${{ !github.event.repository.fork }}

    runs-on: ubuntu-latest

    container:
      image: registry.opensuse.org/opensuse/tumbleweed:latest
      volumes:
        # bind mount the GitHub CLI tool from the Ubuntu host,
        # it is a statically linked binary so it should work also in TumbleWeed
        - /usr/bin/gh:/usr/bin/gh

    steps:
      - name: Configure and refresh repositories
        run: |
          # disable unused repositories to have a faster refresh
          zypper modifyrepo -d repo-non-oss repo-openh264 repo-update && \
            zypper --non-interactive ref

      - name: Install tools
        run: zypper --non-interactive install --no-recommends nodejs npm git gettext-tools python3-langtable

      - name: Configure Git
        run: |
          git config --global user.name "YaST Bot"
          git config --global user.email "yast-devel@opensuse.org"

      - name: Checkout sources
        uses: actions/checkout@v6
        with:
          path: agama

      - name: Checkout Agama-weblate sources
        uses: actions/checkout@v6
        with:
          path: agama-weblate
          repository: ${{ github.repository_owner }}/agama-weblate

      - name: Install NPM packages
        working-directory: ./agama/web/share/po
        run: npm ci

      - name: Validate the PO files
        working-directory: ./agama-weblate
        run:  ls web/*.po | xargs -n1 msgfmt --check-format -o /dev/null

      - name: Update JS translations
        working-directory: ./agama
        run: |
          mkdir -p web/src/po
          # delete the current translations
          find web/src/po -name '*.js' -exec git rm '{}' ';'

          # update the list of supported languages, it is used by the PO->JS converter in the next step
          web/share/update-languages.py --po-directory ../agama-weblate/web > web/src/languages.json

          # rebuild the JS files
          (cd web/src/po && SRCDIR=../../../../agama-weblate/web ../../share/po/po-converter.js)

          # stage the changes
          git add web/src/po/*.js web/src/languages.json

      # any changes detected?
      - name: Check changes
        id: check_changes
        working-directory: ./agama
        run: |
          git diff --staged web | tee tr.diff

          if [ -s tr.diff ]; then
            echo "Translations updated"
            # this is an Output Parameter
            # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-output-parameter
            echo "updated=true" >> $GITHUB_OUTPUT
          else
            echo "Translations not changed"
            echo "updated=false" >> $GITHUB_OUTPUT
          fi

          rm tr.diff

      - name: Push updated PO files
        # run only when a PO file has been updated
        if: steps.check_changes.outputs.updated == 'true'
        working-directory: ./agama
        run: |
          # use an unique branch to avoid possible conflicts with already existing branches
          git checkout -b "po_merge_${GITHUB_RUN_ID}"
          git commit -a -m "Update web translation files"$'\n\n'"Agama-weblate commit: `git -C ../agama-weblate rev-parse HEAD`"
          git push origin "po_merge_${GITHUB_RUN_ID}"

      - name: Create pull request
        # run only when a PO file has been updated
        if: steps.check_changes.outputs.updated == 'true'
        working-directory: ./agama
        run: |
          gh pr create -B master -H "po_merge_${GITHUB_RUN_ID}" \
            --label translations --label bot \
            --title "Update web translation files" \
            --body "Updating the web translation files from the agama-weblate repository"
        env:
          GH_TOKEN: ${{ github.token }}