Install Odoo python package after an issue between download and installation

[enricostano]

Right now the installation of odoo python package is skipped if the source has been already downloaded:

- name: Install Odoo
  become: yes
  become_user: "{{ odoo_role_odoo_user }}"
  shell: "cd {{ odoo_role_odoo_path }} && {{ odoo_role_odoo_python_path }} setup.py install"
  when: odoo_role_desired_tar_download.changed or odoo_role_desired_git_download.changed

Check source here.

But if the process is interrupted between the import_tasks: download.yml and the "Install Odoo" task, and you try to provision again, the condition on line 126 will be false and Odoo will not be installed.

As a result, while installing the Odoo community packages you will get an error similar to the following:

stderr: ERROR: Could not find a version that satisfies the requirement odoo<12.1dev,>=12.0a (from odoo12-addon-account-banking-mandate) (from versions: none)

It means that pip cannot find the odoo package, in this case needed as a dependency by the odoo12-addon-account-banking-mandate package.

Can we use a different when condition on line 126? For instance checking if the odoo package has been already installed?