Configure hyprlock, work on waybar

packages/pulseaudio-popup/default.nix

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+{
+  # Snowfall Lib provides a customized `lib` instance with access to your flake's library
+  # as well as the libraries available from your flake's inputs.
+  lib,
+  # You also have access to your flake's inputs.
+  inputs,
+
+  # All other arguments come from NixPkgs. You can use `pkgs` to pull packages or helpers
+  # programmatically or you may add the named attributes as arguments here.
+  pkgs,
+  stdenv,
+  ...
+}:
+
+pkgs.writeShellApplication {
+  name = "pulseaudio-popup";
+
+  runtimeInputs = with pkgs; [
+    pavucontrol
+    jgmenu
+  ];
+
+  text = ''
+    HDMI_SINK="alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_3__sink"
+    LAPTOP_SINK="alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink"
+
+    HDMI_ICON=$(pactl info | grep -q $HDMI_SINK && echo "checkbox")
+    LAPTOP_ICON=$(pactl info | grep -q $LAPTOP_SINK && echo "checkbox")
+
+    HDMI_VOLUME=$(pactl get-sink-volume $HDMI_SINK | head -n 1 | awk '{print $5}')
+    LAPTOP_VOLUME=$(pactl get-sink-volume $LAPTOP_SINK | head -n 1 | awk '{print $5}')
+
+    read -r -d "" CONF <<EOF
+    Open Pavucontrol,pavucontrol,pavucontrol
+
+    ^sep()
+    HDMI - $HDMI_VOLUME,pactl set-default-sink $HDMI_SINK,$HDMI_ICON
+    Laptop - $LAPTOP_VOLUME,pactl set-default-sink $LAPTOP_SINK,$LAPTOP_ICON
+    EOF
+
+    echo "$CONF" | jgmenu --simple
+  '';
+}