main/postmarketos-base-ui: audio backend improvements (MR 5145)

- Merge pulseaudio and audio-pulse subpkgs
  Just general cleanup, there's no reason to have a separate pulseaudio
  subpackage now since both were being installed anyways (one indirectly
  depended on the other)

- Add 'none' option for audio backend
  Some users might not want to have an audio backend installed taking
  up disk space. For example they're running a headless server or just
  don't want audio I/O, and PA + dependencies, which include mesa(!!)
  can be a lot... I measured 208MB

Note about drop the pulseaudio subpkg and it's "provides="...
This was done in 6e325417, when pmos-base-ui was split off from
pmos-base (3 years ago). I'm not sure how many people are still rocking
a 3yo pmOS install, but the original package (see 92e43e83) was only
pulled in by install_if, so I think the chance that it's in someone's
world file would be really really low.

main/postmarketos-base-ui/APKBUILD

@@ -1,7 +1,7 @@
 # Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=postmarketos-base-ui
 pkgver=22
-pkgrel=4
+pkgrel=5
 pkgdesc="Meta package for minimal postmarketOS UI base"
 url="https://postmarketos.org"
 arch="noarch"
@@ -23,6 +23,7 @@ depends="
 	"
 _pmb_recommends="font-twemoji"
 subpackages="
+	$pkgname-audio-none:_audio_none
 	$pkgname-audio-pipewire:_audio_pipewire
 	$pkgname-audio-pulseaudio:_audio_pulseaudio
 	$pkgname-bluez
@@ -32,7 +33,6 @@ subpackages="
 	$pkgname-networkmanager-usb-tethering:_usb_tethering
 	$pkgname-networkmanager
 	$pkgname-openrc-settingsd:_openrc_settingsd
-	$pkgname-pulseaudio
 	$pkgname-qt-tweaks:qt_tweaks
 	$pkgname-qt-wayland:qt_wayland
 	$pkgname-tinydm
@@ -153,13 +153,6 @@ tinydm() {
 	amove etc/tinydm.d/env-wayland.d/50-sdl-wayland.sh
 }
 
-pulseaudio() {
-	install_if="$pkgname=$pkgver-r$pkgrel pulseaudio"
-	depends="pulseaudio-utils"
-	provides="postmarketos-base-pulseaudio=$pkgver-r$pkgrel"
-	amove etc/pulse/default.pa.d/postmarketos.pa
-}
-
 _obexd() {
 	install_if="$pkgname=$pkgver-r$pkgrel bluez-obexd"
 	replaces="bluez-obexd"
@@ -230,6 +223,14 @@ iwd() {
 	amove usr/lib/NetworkManager/conf.d/50-iwd.conf
 }
 
+_audio_none() {
+	pkgdesc="Do not install any audio backend."
+	provides="postmarketos-base-ui-audio=$pkgver-r$pkgrel"
+	provider_priority=10
+
+	mkdir "$subpkgdir"
+}
+
 _audio_pipewire() {
 	pkgdesc="Use pipewire as the audio backend. (but may not work with all devices)"
 	depends="pipewire-alsa pipewire-pulse"
@@ -241,12 +242,12 @@ _audio_pipewire() {
 
 _audio_pulseaudio() {
 	pkgdesc="Use pulseaudio as the audio backend."
-	depends="alsa-plugins-pulse pulseaudio pulseaudio-alsa !pipewire-pulse"
+	depends="alsa-plugins-pulse pulseaudio pulseaudio-alsa pulseaudio-utils !pipewire-pulse"
 	provides="postmarketos-base-ui-audio=$pkgver-r$pkgrel"
 	provider_priority=100
 
-	mkdir "$subpkgdir"
 	amove usr/share/wireplumber/wireplumber.conf.d/50-pulseaudio.conf
+	amove etc/pulse/default.pa.d/postmarketos.pa
 }
 
 flatpak() {