We no longer need to install python on Ubuntu 18.04

[dannylamb]

Ubuntu 18.04 ships with python 3, so instead of installing python 2, we can set ansible_python_interpreter=/usr/bin/python3 in our host file if using Ubuntu.

[whikloj]

We still allow people to specify other versions so we should either restrict the base boxes allowed or make the check of ubuntu versions decide on this action.

[dannylamb]

Eureka:

In bootstrap.yml we do this to ensure python

    - name: install python
      raw: test -e /usr/bin/python || (apt-get update; apt-get install -y python;)
      register: output
      changed_when:
        - output.stdout != ""
        - output.stdout != "\r\n"
      when: islandora_distro|default('') is match("ubuntu/")

which leads to it being skipped when the playbook is run

TASK [install python] ************************************************************************************************************************
Wednesday 22 January 2020  15:19:30 -0400 (0:00:00.078)       0:00:00.078 ***** 
skipping: [default]

because I'm running ansible-playbook manually and not using Vagrant, so islandora_distro is not defined 😅

I'll confirm by adding that in with -e next time I cycle these boxes.

[dannylamb]

This is indeed user error 😰 I mean, we still have python3 by default and aren't using it, but i'm content to live with the consistency of python between ubuntu and centos.

[whikloj]

No this is still an issue. This is the reason that when I tried to build a playbook it froze at this step. Changing this step from

raw: test -e /usr/bin/python || (apt-get update; apt-get install -y python;)

to

raw: test -e /usr/bin/python || (apt-get update; apt-get install -y python3;)

fixed it. So I personally need this fixed.