autocomplete doesn't work on zsh

[LuanVSO]

zsh can't load dnf5 bash autocomplete causing it to use dnf4 autocomplete which causes problems specially with the remove command:

[m-blaha]

Thanks for reporting! There indeed are several problem with completions/dnf5 script:

• _init_completion does not exist in zsh environment
• mapfile does not exist in zsh

The issue is valid and the completion needs to be adjusted to work in both environments.

[sebastian-de]

Completion with fish doesn't work with dnf5 either - is the same completion-script used for all shells?

[LuanVSO]

on dnf4 there's a script for bash and a different one for zsh

[m-blaha]

Downstream issue: https://bugzilla.redhat.com/show_bug.cgi?id=2324465

[firewavemtl]

I tried very quickly to adapt _dnf to dnf5 but looks like the package_db somehow changed. We might do an intermediate sqlite file, as it was in the past (or present?) but it's not that great since dnf5 already manages a good db. I have to dig into dnf5 code to understand the support and structure.