{#- Beside every pup.json download: the packs it leaves behind (core/pupfile.packs_left_behind).
    `left_behind` from the page; `moving` when the pup is already packing (a leave cannot reach
    the den while sync is stopped); `retired` when this box is retired — it never syncs again,
    so a leave from here could never arrive: no leave links, the way back instead. A warning
    with the way out, never a block. -#}
{% if left_behind %}
<div class="flash warn pupjson-packs">
  <p>⚠ <b>pup.json carries no pack</b> — and this box is still in
    {% for k in left_behind %}<a href="/pack/{{ k.uid }}">{{ k.name or k.uid }}</a>{% if k.status == 'leaving' %} (leaving){% endif %}{{ ', ' if not loop.last }}{% endfor %}.
    Each den keeps your membership through <b>this</b> box, and refuses a join by your Pup ID from
    the new one until it has let go of this one.</p>
  {% set to_leave = left_behind|rejectattr('status', 'equalto', 'leaving')|list %}
  {% if retired %}
  <p>This box is retired, so it tells no den anything any more — a leave from here would never
    arrive. <a href="/pup#move">Bring your pup back to this box</a> and leave from here (then retire
    it again), or ask their operators to remove you. Then join again from the new box with fresh
    tags. The whole game (<a href="/export/bundle.zip" download>bundle.zip</a>) keeps your packs instead.</p>
  {% else %}
  <p>{% if moving %}Cancel the move (a leave cannot reach a den while you are packing), leave here and
    sync, then prepare again{% else %}Leave them here first{% endif %}{% if to_leave %}:
    {% for k in to_leave %}<a href="/pack/{{ k.uid }}/leave">leave {{ k.name or k.uid }}</a>{{ ', ' if not loop.last }}{% endfor %}{% endif %}
    — or ask their operators to remove you. Then join again from the new box with fresh tags.
    {%- if left_behind|selectattr('status', 'equalto', 'leaving')|list %} A pack you are leaving
    lets go once your box has told its den (or after seven days).{% endif %}
    The whole game (<a href="/export/bundle.zip" download>bundle.zip</a>) keeps your packs instead.</p>
  {% endif %}
</div>
{% endif %}