It was basically just a `environment.systemPackages` synonym,
only GNOME used it, and it was stretching the responsibilities
of the flatpak module too far.
It also makes it cleaner to avoid installing the program
using GNOME module’s `excludePackages` option.
Partially reverts: https://github.com/NixOS/nixpkgs/pull/101516
Fixes: https://github.com/NixOS/nixpkgs/issues/110310
(It was requested by them.)
I left one case due to fetching from their personal repo:
pkgs/desktops/pantheon/desktop/extra-elementary-contracts/default.nix
The upstream pipewire config is written in an almost, but not quite
JSON format. The parser accepts standard JSON, though, so we don't
need to write our file in the same nonstandard version.
The typing for all config options is changed from `types.attrs`, which
behaves poorly when the option is set from multiple locations, to the
formats.json-type.
Also, rewrite some very long one-liners for improved readability.
This release replaces the libpulseaudio shim with a pipewire module that acts as a fake pulseaudio server along with a systemd service that loads that module on demand.
This adds basically an indirection to systemPackages
to automatically install an interface for flatpak for their respective
environments. e.g if I enable pantheon and flatpak you'll get appcenter,
and on gnome you'll see gnome-software.
https://github.com/NixOS/nixpkgs/issues/99648#issuecomment-706691174
This splits PulseAudio and JACK emulation into separate outputs. Doing
so provides a number of benefits.
First it fixes pw-pulse and pw-jack. Prior to this they pointed to bogus
locations because the environment variables were not evaluated.
Technically fixing this only requires setting libpulse-path and
libjack-path to any absolute path not necessarily separate outputs but
it comes as a nice result.
Secondly it allows overriding libpulseaudio with pipewire.pulse in many
packages. This is possible because the new outputs have a more standard
layout.
