From 3dcd5629a735d2fd58d270bac3da284d924844a6 Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Thu, 1 Jun 2023 21:13:44 +0000
Subject: [PATCH] moby: set ALSA_CONFIG_UCM2 in all the places it's needed

---
 hosts/by-name/moby/default.nix         | 24 +++++++++++++++++++++---
 pkgs/patched/alsa-ucm-conf/default.nix |  2 +-
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/hosts/by-name/moby/default.nix b/hosts/by-name/moby/default.nix
index 8ece4031..5c68ad94 100644
--- a/hosts/by-name/moby/default.nix
+++ b/hosts/by-name/moby/default.nix
@@ -80,9 +80,27 @@
   # inject specialized alsa configs via the environment.
   # specifically, this gets the pinephone headphones & internal earpiece working.
   # see pkgs/patched/alsa-ucm-conf for more info.
-  # older code had me also setting `systemd.services.pulseaudio.environment.ALSA_CONFIG_UCM2`,
-  # but it seems safe to set this only globally, and not per-service.
-  environment.variables.ALSA_CONFIG_UCM2 = "${pkgs.alsa-ucm-conf-sane}/share/alsa/ucm2";
+  environment.variables.ALSA_CONFIG_UCM2 = "/run/current-system/sw/share/alsa/ucm2";
+  environment.pathsToLink = [ "/share/alsa/ucm2" ];
+  environment.systemPackages = [ pkgs.alsa-ucm-conf-sane ];
+  systemd =
+    let ucm-env = config.environment.variables.ALSA_CONFIG_UCM2;
+    in {
+    # cribbed from <repo:nixos/mobile-nixos:modules/quirks/audio.nix>
+
+    # pulseaudio
+    user.services.pulseaudio.environment.ALSA_CONFIG_UCM2 = ucm-env;
+    services.pulseaudio.environment.ALSA_CONFIG_UCM2      = ucm-env;
+
+    # pipewire
+    user.services.pipewire.environment.ALSA_CONFIG_UCM2       = ucm-env;
+    user.services.pipewire-pulse.environment.ALSA_CONFIG_UCM2 = ucm-env;
+    user.services.wireplumber.environment.ALSA_CONFIG_UCM2    = ucm-env;
+    services.pipewire.environment.ALSA_CONFIG_UCM2            = ucm-env;
+    services.pipewire-pulse.environment.ALSA_CONFIG_UCM2      = ucm-env;
+    services.wireplumber.environment.ALSA_CONFIG_UCM2         = ucm-env;
+  };
+
 
   hardware.opengl.driSupport = true;
 }
diff --git a/pkgs/patched/alsa-ucm-conf/default.nix b/pkgs/patched/alsa-ucm-conf/default.nix
index ac74a04b..b7ea4efd 100644
--- a/pkgs/patched/alsa-ucm-conf/default.nix
+++ b/pkgs/patched/alsa-ucm-conf/default.nix
@@ -8,7 +8,7 @@ alsa-ucm-conf.overrideAttrs (upstream: {
   # alternative to patching is to plumb `ALSA_CONFIG_UCM2 = "${./ucm2}"` environment variable into the relevant places
   # e.g. `systemd.services.pulseaudio.environment`.
   # that leaves more opportunity for gaps (i.e. missing a service),
-  # on the other hand thie method causes about 500 packages to be rebuilt
+  # on the other hand this method causes about 500 packages to be rebuilt (including qt5 and webkitgtk).
   #
   # note that with these files, the following audio device support:
   # - headphones work.