[Bug 2155142] Re: python3-heat-dashboard misses template generator static assets

[Guillaume Boutry]

Heat-dashboard will be disabled on snap-openstack 2026.1/edge until this
is fixed.

** Also affects: snap-openstack/2026.1
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2155142

Title:
  python3-heat-dashboard misses template generator static assets

Status in OpenStack Snap:
  New
Status in OpenStack Snap 2026.1 series:
  New
Status in heat-dashboard package in Ubuntu:
  New

Bug description:
  `python3-heat-dashboard` 15.0.0-0ubuntu1 installs Horizon enabled
  files that reference Heat template generator static assets, but the
  binary package does not include those assets.

  This breaks `openstack-dashboard` package configuration when
  `openstack-dashboard` and `python3-heat-dashboard` are installed
  together in the same apt transaction.

  
  ## Affected Packages

  - Source package: `heat-dashboard`
  - Binary package: `python3-heat-dashboard`
  - Version: `15.0.0-0ubuntu1`
  - Ubuntu series observed: `resolute`
  - Related package: `openstack-dashboard` `4:25.7.1-0ubuntu1`

  ## Steps to Reproduce

  1. In a clean resolute environment, install both packages in one transaction:
     `apt install openstack-dashboard python3-heat-dashboard`

  2. Observe `openstack-dashboard` postinst running `collectstatic` and
     `compress` after both packages are staged.

  
  ## Error observed
  CommandError: An error occurred during rendering horizon/_scripts.html:
  'dashboard/project/heat_dashboard/template_generator/js/components/template-generator.module.js' could not be found in the COMPRESS_ROOT '/var/lib/openstack-dashboard/static' or with staticfiles.

  
  Can also be reproduced when running autopkgtests for heat-dashboard.

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