[pacman-dev] [PATCH v4] libalpm: Add support for trigger dropins

Eli Schwartz eschwartz at archlinux.org
Mon Aug 24 21:18:04 UTC 2020

On 8/24/20 4:21 PM, Andrew Gregory wrote:
> I'm still a bit skeptical.  I can't say I'm particularly familiar with
> fonts and their configuration, but is there really a valid use case
> for that kind of per-package configuration that we need to support?

I kind of agree, because while it's true font conf files can add new
search paths it's also not unreasonable to just use one unified path, as
fontconfig already recursively searches there and you can organize fonts
by subdirectory.

Nevertheless, thanks Allan for mentioning it, because I really wanted to
know if this could be suitably generic for non-kernel use and this gives
a much better framework for discussion...

> More abstractly, I'm not fond of how much this ties packages together.
> One of the ideas of hooks was for the package that does the work to
> handle all of the necessary details so the triggering packages
> wouldn't have to worry about it.  With this approach, they not only
> have to know to adjust the hook, they also have to know the name of
> the hook and how the hook works.  Changes to the hook then require an
> adjustment and rebuild of any package modifying it.  This is not an
> entirely new problem, user overrides are also dependant on hook
> naming, but this does exacerbate it in a way that I think will be easy
> for packagers to miss and cause breakage.
> What about adding Include support to hooks?  Then hooks that need this
> type of functionality could explicitly include trigger files from
> a particular directory, insulating the process from simple hook
> renaming and hopefully making it more obvious when changes to the hook
> will require changes to any package that modifies it.

I think you're right and Include support would be a better way to go here.

Eli Schwartz
Bug Wrangler and Trusted User

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