'netplan help' doesn't work as expected

[Mark Shuttleworth]

This is unexpected:

$ sudo netplan help
usage: netplan [-h] [--debug] ...
netplan: error: argument : invalid choice: 'help' (choose from 'generate', 'apply', 'ifupdown-migrate')

Please could 'netplan help' do the same as 'netplan -h'?

[Mathieu Trudel-Lapierre (cyphermox)]

Triaging.

I agree, I'd want 'netplan <*> help' to work everywhere, and I had run into trouble with the rest of the command parsing. I believe I've fixed the parsing appropriately now, so we do need to revisit the help command.

Let's tag this 'bitesize'; I believe it should be approachable by new contributors (dja?) as a nice way to get familiar with the codebase.

[Mathieu Trudel-Lapierre (cyphermox)]

This should be High priority; fixing this has a high benefit to our users for relatively little work.

[Mathieu Trudel-Lapierre (cyphermox)]

In Progress: I've fixed up 'help' for all commands/subcommands, and that should now get automatically set up for new netplan commands. Code is in https://github.com/CanonicalLtd/netplan/tree/help_command; I will merge this as part of release 0.34.

[Eric Desrochers (slashd)]

* Fix Released in version 0.34

netplan.io (0.34) bionic; urgency=medium
    * Implement 'help' as a subcommand of any netplan command, so that running
      'netplan * help' always returns some helpful information. (LP: #1748629)