Add support for XBPS (Void Linux)

[JamiKettunen]

I'm not asking you to add this support, mainly made this as a reminder for myself to look into it one day :)

Looking under manager/ it doesn't look that bad to implement.

Distro: https://voidlinux.org/
Package manager: https://github.com/void-linux/xbps
Docs: https://docs.voidlinux.org/xbps/index.html

[Elara6331]

Copied from https://gitea.arsenm.dev/Arsen6331/lure/issues/1#issuecomment-392

Implementing support for the package manager itself is the easy part. The difficult part is adding support for building the actual package. I use nfpm to do so. When I started building LURE, nFPM had no support for Arch packages, so I added it with a PR. Despite Arch having one of the simplest packaging formats that exist, that took 1.2k lines of code. I do eventually plan to look into XBPS support and how much it would take to implement, but this is likely a long-term goal since I don't use Void regularly.

[JamiKettunen]

Hm this could be tricky with regards to the triggers inside the generated .xbps packages as well, we'd basically have to remake https://github.com/void-linux/void-packages/blob/master/common/hooks/post-install/04-create-xbps-metadata-scripts.sh or reuse that somehow, otherwise e.g. update-desktop-database won't be called when new .desktop files are installed by LURE packages

[JamiKettunen]

As for other data like list of files included and the package dependencies etc. in the Zstandard compressed tar archive there are files.plist and props.plist respectively, but as nFPM keeps a 0-dependencies status https://pkg.go.dev/howett.net/[email protected] can't be used for example to create those, so likely a naïve / really simple plist helpers would also have to be implemented.

[Elara6331]

If you look at their go.mod, they have plenty of dependencies. I think they meant after building, because Go generates static executables.

[JamiKettunen]

Right yeah, I've not worked with go before. Another choice for the plist library could be https://github.com/groob/plist