Monkey-patch the help text when showing management command help in rb-site.

Review Request #11361 — Created Jan. 7, 2021 and submitted

chipx86
Review Board
release-4.0.x
reviewboard

When running rb-site manage ... <command> --help, we'd show the
standard management command help text that Django displays. This would
end up showing the wrong program invocation, which wasn't helpful. For
instance:

rbsite.py set-siteconfig

When we wanted something like:

rb-site manage /var/www/reviewboard set-siteconfig

This change fixes that by ditching the execute_from_command_line()
wrapper function and instead creating a ManagementUtility directly,
where we set the correct program name in order to get the right command
in the standard manage.py --help list of commands. We then pass in
rb-site-manage as a placeholder program name, which gets replaced in a
monkey-patched parser wrapper.

This is, unfortunately, the only way to do that without outright
replacing Django management command infrastructure, but should be safe
to do.

Tested both rb-site manage /path/to/site -- --help and
rb-site manage /path/to/site <command> -- --help for several different
commands. Saw a useful "usage:" line in the help with the full command.

Summary
Monkey-patch the help text when showing management command help in rb-site.
david
  1. Ship It!
  2. 
      
chipx86
Review request changed

Status: Closed (submitted)

Change Summary:

Pushed to release-4.0.x (c064386)
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