ft: moved cables.sh into nix

modules/audio/default.nix

@@ -0,0 +1,125 @@
+{ pkgs, ... }:
+
+let
+  linkSinksScript = pkgs.writeShellApplication {
+    name = "link-virtual-sinks";
+    runtimeInputs = with pkgs; [
+      coreutils
+      gnugrep
+      pipewire
+    ];
+    runtimeEnv = {
+      USB_C_SINK = "alsa_output.usb-HP__Inc_HyperX_Cloud_III_Wireless_0000000000000000-00.analog-stereo";
+    };
+    text = builtins.readFile ./linkSinks.sh;
+  };
+in 
+{
+  services.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    jack.enable = true;
+
+    # disable automatic gain control for specific apps
+    extraConfig.pipewire-pulse."10-block-source-volume.conf"."pulse.rules" = [
+      {
+        matches = [
+          { "application.name" = "~Chromium.*"; }
+          { "application.process.binary" = "Discord"; }
+          { "application.process.binary" = "vesktop"; }
+          # TODO: add element to this list
+        ];
+        actions.quirks = [ "block-source-volume" ];
+      }
+    ];
+
+     extraConfig.pipewire."91-virtual-sinks" = {
+       "context.objects" = [
+        {
+         factory = "adapter";
+         args = {
+          "factory.name" = "support.null-audio-sink";
+          "node.name" = "game";
+          "node.description" = "game";
+          "media.class" = "Audio/Sink";
+          "audio.position" = "FL,FR";
+         };
+        }
+        {
+         factory = "adapter";
+         args = {
+          "factory.name" = "support.null-audio-sink";
+          "node.name" = "clementine";
+          "node.description" = "clementine";
+          "media.class" = "Audio/Sink";
+          "audio.position" = "FL,FR";
+         };
+        }
+        {
+         factory = "adapter";
+         args = {
+          "factory.name" = "support.null-audio-sink";
+          "node.name" = "element";
+          "node.description" = "element";
+          "media.class" = "Audio/Sink";
+          "audio.position" = "FL,FR";
+         };
+        }
+        {
+         factory = "adapter";
+         args = {
+          "factory.name" = "support.null-audio-sink";
+          "node.name" = "combine";
+          "node.description" = "combine";
+          "media.class" = "Audio/Sink";
+          "audio.position" = "FL,FR";
+         };
+        }
+       ];
+      };
+
+    wireplumber.extraConfig."91-default-sink" = {
+      "wireplumber.settings" = {
+        "default.audio.sink" = "combine";
+      };
+    };
+  };
+
+  programs.nix-ld.libraries = [ pkgs.pipewire ];
+
+  systemd.user.services.link-virtual-sinks = {
+    description = "Link virtual PipeWire sinks";
+
+    wantedBy = [ "graphical-session.target" ];
+    wants = [
+      "pipewire.service"
+      "wireplumber.service"
+    ];
+    after = [
+      "pipewire.service"
+      "wireplumber.service"
+    ];
+
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${linkSinksScript}/bin/link-virtual-sinks";
+      RemainAfterExit = true;
+    };
+  };
+
+  # home-manager.users.djai.home.packages = with pkgs; [
+  #   pavucontrol
+  #   qpwgraph
+  # ];
+
+  users.users.djai.packages = with pkgs; [
+    pavucontrol
+    pipewire
+    qpwgraph
+  ];
+}

modules/audio/linkSinks.sh

@@ -0,0 +1,40 @@
+# wait until pw-link port becomes available
+# $1: port identifier
+wait_for_port() {
+  for _ in $(seq 1 10); do
+    if pw-link -io 2>/dev/null | grep -Fq "$1"; then
+      return 0
+    fi
+    sleep 1
+  done
+  echo "Timed out waiting for PipeWire port: $1" >&2
+  return 1
+}
+
+# link two pipewire ports together. waits for htme to exist first.
+# $1: output port
+# $2: input port
+link_ports() {
+  wait_for_port "$1"
+  wait_for_port "$2"
+
+  # pw-link errors if a link already exists, but we don't want that to fail the script
+  pw-link "$1" "$2" 2>/dev/null || true
+}
+
+# link clementine -> combine
+link_ports "clementine:monitor_FL" "combine:playback_FL"
+link_ports "clementine:monitor_FR" "combine:playback_FR"
+
+# link element -> combine
+link_ports "element:monitor_FL" "combine:playback_FL"
+link_ports "element:monitor_FR" "combine:playback_FR"
+
+# link game -> combine
+link_ports "game:monitor_FL" "combine:playback_FL"
+link_ports "game:monitor_FR" "combine:playback_FR"
+
+# link combine -> usb_c_sink
+link_ports "combine:monitor_FL" "$USB_C_SINK:playback_FL"
+link_ports "combine:monitor_FR" "$USB_C_SINK:playback_FR"
+