Add option to choose preferred AUR helper

[yochananmarqos]

I just tested while Yay and Paru were installed and it used Yay by default. I thought when you first added Paru support it was the other way around. Either way, it would be nice to be able to have both installed and choose between them.

[r-darwish]

I don't strongly object, but what's the point in having both of them? If you're happy with one wouldn't it be simple just to uninstall the other? It's not like they fill different goals.

[yochananmarqos]

Sounds logical, sure. However, I like to test both. It's convenient to have them both installed rather than having to uninstall and reinstall.

There are things Paru can do that Yay cannot as well.

[r-darwish]

Fixed in #776

[yochananmarqos]

What's the configuration option? I don't see anything new in the man page or example config.

[MCOfficer]

What's the configuration option? I don't see anything new in the man page or example config.

Judging by the source code in #776, linux.arch_package_manager, so something like this:

[linux]
# Arguments to pass yay (or paru) when updating packages
#yay_arguments = "--nodevel"
#trizen_arguments = "--devel"
arch_package_manager = "paru"
...

[yochananmarqos]

The AUR helpers have to be capitalized, turns out:

 2021-10-26T18:25:52.019Z ERROR topgrade::config > Failed to deserialize /home/yochanan/.config/topgrade.toml
 2021-10-26T18:25:52.019Z ERROR topgrade::config > failed to load configuration: unknown variant `yay`, expected one of `Autodetect`, `Trizen`, `Paru`, `Yay`, `Pacman` for key `linux.arch_package_manager` at line 95 column 1

[MCOfficer]

The AUR helpers have to be capitalized, turns out:

 2021-10-26T18:25:52.019Z ERROR topgrade::config > Failed to deserialize /home/yochanan/.config/topgrade.toml
 2021-10-26T18:25:52.019Z ERROR topgrade::config > failed to load configuration: unknown variant `yay`, expected one of `Autodetect`, `Trizen`, `Paru`, `Yay`, `Pacman` for key `linux.arch_package_manager` at line 95 column 1

Good catch, i've filed #784 for that and the config example.