'#!/usr/bin/env python' does not work on Ubuntu Focal (e.g. in 55-heat-config)

[Andreas Florath]

Description
===========

On Ubuntu Focal there is no package which provides 'python'. os-refresh-config uses the construct '#!/usr/bin/env python' which fails - because python cannot be found.

Steps to reproduce
==================

Boot Ubuntu Focal with os-collect-config installed.

Expected result
===============

A valid python interpreter is found and the scripts are executed.

Actual result
=============

An error message is displayed - os-collect-config cannot run scripts which need 'python'.

Environment
===========

Ubuntu Focal VM running inside a Heat stack created with OpenStack diskimage-builder running in OpenStack Train installed with OpenStack Ansible.

Logs & Configs
==============

Mar 01 08:17:51 glr01-gitlab-runner-3lo4swudclmf os-collect-config[2582]: dib-run-parts Sun Mar 1 08:17:51 UTC 2020 Running /usr/libexec/os-refresh-config/configure.d/55-heat-config
Mar 01 08:17:51 glr01-gitlab-runner-3lo4swudclmf os-collect-config[2592]: /usr/bin/env: ‘python’: No such file or directory
Mar 01 08:17:51 glr01-gitlab-runner-3lo4swudclmf os-collect-config[2550]: [2020-03-01 08:17:51,868] (os-refresh-config) [ERROR] during configure phase. [Command '['dib-run-parts', '/usr/libexec/os-refresh-config/configure.d']' returned non-zero exit status 127]
Mar 01 08:17:51 glr01-gitlab-runner-3lo4swudclmf os-collect-config[2550]: [2020-03-01 08:17:51,869] (os-refresh-config) [ERROR] Aborting...

[Luke Short (ekultails)]

This looks like a packaging issue. The source code does not hard code `#!/usr/bin/env python`. See: http://paste.openstack.org/show/790205/ . We need to find a way for it to use python3 instead.

[Ian (superian)]

Still affects Ubuntu MATE 20.04 Focal beta, e.g.

$ youtube-dl --help
/usr/bin/env: ‘python’: No such file or directory

Given how many packages use Python, this does seem to be serious.

[Marios Andreou (marios-b)]

This is an automated action. Bug status has been set to 'Incomplete' and target milestone has been removed due to inactivity. If you disagree please re-set these values and reach out to us on freenode #tripleo

[Launchpad Janitor (janitor)]

[Expired for tripleo because there has been no activity for 60 days.]