# TODO(mordred) Put the translations logic into a sphinx plugin?
- name: Check if translations exist for release notes
  stat:
    path: "{{ zuul_work_dir }}/releasenotes/source/locale"
    get_checksum: false
    get_mime: false
    get_md5: false
  register: translations

- name: Prepare release note translations
  shell:
    chdir: '{{ zuul_work_dir }}'
    executable: /bin/bash
    cmd: |
      set -e
      set -x

      DOCNAME=releasenotes
      DIRECTORY=releasenotes

      source {{ zuul_work_virtualenv }}/bin/activate

      # Mapping of language codes to language names
      declare -A LANG_NAME=(
          ["cs"]="Czech"
          ["de"]="German"
          ["en_AU"]="English (Australian)"
          ["en_GB"]="English (United Kingdom)"
          ["es"]="Spanish"
          ["fr"]="French"
          ["id"]="Indonesian"
          ["it"]="Italian"
          ["ja"]="Japanese"
          ["ko_KR"]="Korean (South Korea)"
          ["ne"]="Nepali"
          ["pt_BR"]="Portuguese (Brazil)"
          ["ru"]="Russian"
          ["tr_TR"]="Turkish (Turkey)"
          ["zh_CN"]="Chinese (China)"
      )

      # Check that locale_dirs is really set, otherwise translations
      # will not work.
      if ! grep -q -E '^locale_dirs *=' $DIRECTORY/source/conf.py; then
          echo "Translations exist and locale_dirs missing in source/conf.py"
          exit 1
      fi

      REFERENCES=`mktemp`
      trap "rm -f -- '$REFERENCES'" EXIT

      # Extract translations
      sphinx-build -b gettext \
          -d ${DIRECTORY}/build/doctrees.gettext \
          ${DIRECTORY}/source/ \
          ${DIRECTORY}/source/locale/

      # Add links for translations to index file
      cat <<EOF >> ${REFERENCES}

      Translated Release Notes
      ========================

      EOF

      # Check all language translation resources
      for locale in `find ${DIRECTORY}/source/locale/ -maxdepth 1 -type d` ; do
          # Skip if it is not a valid language translation resource.
          if [ ! -e ${locale}/LC_MESSAGES/${DOCNAME}.po ]; then
              continue
          fi
          language=$(basename $locale)

          echo "Building $language translation"

          # Prepare all translation resources
          for pot in ${DIRECTORY}/source/locale/*.pot ; do
              # Get filename
              resname=$(basename ${pot} .pot)

              # Merge all translation resources. Note this is done the same
              # way as done in common_translation_update.sh where we merge
              # all strings together in a single file.
              msgmerge --silent -o \
                  ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/${resname}.po \
                  ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/${DOCNAME}.po \
                  ${pot}
              # Compile all translation resources
              msgfmt -o \
                  ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/${resname}.mo \
                  ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/${resname}.po
          done

          # Build translated document
          sphinx-build -b html -D language=${language} \
              -d "${DIRECTORY}/build/doctrees.${language}" \
              ${DIRECTORY}/source/ ${DIRECTORY}/build/html/${language}

          # Reference translated document from index file
          if [ ${LANG_NAME["${language}"]+_} ] ; then
              name=${LANG_NAME["${language}"]}
              name+=" (${language})"
              echo "* \`$name <${language}/index.html>\`__" >> ${REFERENCES}
          else
              echo "* \`${language} <${language}/index.html>\`__" >> ${REFERENCES}
          fi

          # Remove newly created files
          git clean -f -q ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/*.po
          git clean -f -x -q ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/*.mo
          # revert changes to po file
          git reset -q ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/${DOCNAME}.po
          git checkout -- ${DIRECTORY}/source/locale/${language}/LC_MESSAGES/${DOCNAME}.po
      done

      # Now append our references to the index file. We cannot do this
      # earlier since the sphinx commands will read this file.
      cat ${REFERENCES} >> ${DIRECTORY}/source/index.rst

      # Remove newly created pot files
      rm -f ${DIRECTORY}/source/locale/*.pot
  when: translations.stat.exists

- name: Run releasenotes sphinx build
  shell:
    executable: /bin/bash
    chdir: '{{ zuul_work_dir }}'
    cmd: |
      {{ zuul_work_virtualenv }}/bin/sphinx-build -a -E -W \
        -d releasenotes/build/doctrees \
        -b html releasenotes/source releasenotes/build/html