Experimenting with various apt package installs [e.g. python3-cryptography, so Calibre-Web unit test works on Raspberry Pi OS]

[deldesir]

This PR is for testing different packages to understand what affects Calibre-Web when installed with UNITTEST.

[holta]

Background:

• Calibre-Web installs but fails to work [502 Bad Gateway] on Raspberry Pi OS w/ local_vars_unittest.yml — but installing Kolibri or Admin Console adds the missing dependency — which appears as "ModuleNotFoundError: No module named 'cryptography'" calibre-web#260 (comment)

[holta]

@EMG70 can you help us test this PR #3815 by unit testing Calibre-Web?

In other words:

1. Start with a completely new 64-bit Raspberry Pi OS Lite running on almost any Raspberry Pi.
2. Install IIAB with this PR 3815, by running: curl iiab.io/install.txt | bash -s 3815
3. Type 0 (ZERO, for local_vars_unittest.yml) when it asks you to "PLEASE PICK (1) 🚵 SMALL (2) 🚢🚣 MEDIUM or (3) 🚂🚃🚃 LARGE (NEEDS 2+ GB RAM)."
4. Use nano to toggle Lines 393-394 to True in /etc/iiab/local_vars.yml
5. Also add these 2 lines to /etc/iiab/local_vars.yml to speed up the install — and avoid setting up the Raspberry Pi's internal hotspot:

   network_install: False
   network_enabled: False
   

6. Run sudo iiab to install IIAB (watch for it completing in about 15 minutes?!)
7. Test that Calibre-Web is fully working, using URLs like http://ACTUAL.IIAB.IP.ADDRESS/books 🙏
8. Please post here on this ticket, the URL that results from running sudo iiab-diagnostics, Thanks!

[EMG70]

A new VM SIZE 0 (Unittest) was installed on a RPI 400 ,Calibre-web now reachable using IP/books.
SUDO IIAB-DIAGNOSTICS https://paste.centos.org/view/e3849191

[holta]

1. fyi @deldesir also confirmed that apt install python3-cryptography can be run manually (as root) on a bare 64-bit Raspberry Pi OS Lite on RPi 5, to fully simulate this PR, allowing for rapid Calibre-Web unit-testing on RasPiOS at last (Great News!)

2. In future, if proven rock-solid (or close!) we'd like to move towards encouraging everyone to use a much more recent version of Python's cryptography module / package — along the lines of PR Add cryptography to requirements.txt so Calibre-Web unit test works on Raspberry Pi OS calibre-web#262 — i.e. preferably having cryptography be internal to the Python venv (/usr/local/calibre-web-py3) as specified by the other requirements.txt file, defined by the upstream Calibre-Web repo itself! 🙏

[holta]

Just FYI this PR might be reverted in future — e.g. if there's an upstream decision to auto-install cryptography (via Calibre-Web's requirements.txt) here:

• Should Calibre-Web's requirements.txt install cryptography ? janeczku/calibre-web#3183

[holta]

This should now be reverted, as a result of:

• Should Calibre-Web's requirements.txt install cryptography ? janeczku/calibre-web#3183
• PR README.md: 3 merge conflicts resolved, RE: Upstream Changes (14 commits, 62 files changed, 4 contributors) calibre-web#275