python manage.py compress: bin/sh: 1: lesscpy: not found

[Daniel Speichert]

When running the command to offline-compress theme:

root@cloud:/usr/share/openstack-dashboard# python manage.py compress
Found 'compress' tags in:
        /usr/share/openstack-dashboard/openstack_dashboard/templates/_stylesheets.html
        /usr/share/openstack-dashboard-drexel-theme/templates/_stylesheets.html
        /usr/lib/python2.7/dist-packages/horizon/templates/horizon/_conf.html
        /usr/lib/python2.7/dist-packages/horizon/templates/horizon/_scripts.html
Compressing... CommandError: An error occured during rendering /usr/share/openstack-dashboard/openstack_dashboard/templates/_stylesheets.html: /bin/sh: 1: lesscpy: not found

It stops trying to execute a bogus binary "lesscpy".
Doing:
# ln -s /usr/bin/lessc /usr/local/bin/lesscpy
fixes the issue.

Package: python-django-horizon
State: installed
Automatically installed: yes
Version: 1:2013.2~rc3-0ubuntu1~cloud0

[Daniel Speichert (dasp)]

Could you comment on the reason for why it is not a bug?

[Kieran Spear (kspear)]

It looks like a bug in packaging rather than in Horizon itself. I've retargeted it to the Ubuntu Horizon package, so the Ubuntu guys can take a look.

[Kieran Spear (kspear)]

FWIW, it looks like python-lesscpy isn't a hard dependency of the Ubuntu package, so you probably need to install it explictly if you want to use compression:

sudo apt-get install python-lesscpy

[Matthias Runge (mrunge)]

I'd like to add, when using COMPRESS_OFFLINE = True, you don't need a compressor at runtime. Especially this was a concern, when we used nodejs and less.js to compress, and nobody wants both permanently on a server for a task to be only run once.

[Daniel Speichert (dasp)]

So in fact the bug is in Ubuntu package - it should depend on python-lesscpy.

[Matthias Runge (mrunge)]

@Daniel Speichert, it depends; if COMPRESS_OFFLINE is set, python-lesscpy does NOT necessarily need to be installed at all. As other example, you don't install all test requirements on a server machine as well.

[Daniel Speichert (dasp)]

But even if COMPRESS_OFFLINE =True, then you still need python-lesscpy to manually execute "python manage.py compress", which is part of Horizon. So in all cases users need this package.

[Matthias Runge (mrunge)]

Yes exactly. And the same is true for run_tests.sh, where you need various other packages, or you accept, they will be fetched via internet, which might be allowed/disallowed by (firewall policy) or ...

[Daniel Speichert (dasp)]

Regular users don't run test but need to compress their templates. Isn't that a difference here? It's only this one package needed as dependency? Is this package at least "recommended"?

[Kieran Spear (kspear)]

python-lesscpy is "suggested" in the Horizon package:
https://bugs.launchpad.net/ubuntu/+source/horizon/+bug/1226674

AFAIK there should be no need to run compress as the Ubuntu package includes the compressed resources already.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[James Page (james-page)]

The Ubuntu package for Horizon ships with COMPRESS_OFFLINE = True and all required assets pre-compressed as part of the packages.

So python-lesscpy is not required for normal operation, you should not need to re-run compression - hence its only a suggests.

Marking Won't Fix.

[James Pic (jamespic)]

It would be so cool if someone who actually likes django did a new version of the horizon package ... then it would match expectations from all django users.