switch audio with rofi and add extraLib

modules/nixos/graphical/default.nix

@@ -17,6 +17,10 @@
       type = lib.types.str;
       description = "Command to use for choosing windows";
     };
+    audioSwitchCommand = lib.mkOption {
+      type = lib.types.str;
+      description = "Command to use for switching audio sink";
+    };
     toggleBarCommand = lib.mkOption {
       type = lib.types.str;
       description = "Command to hide and show the status bar.";

modules/nixos/graphical/i3.nix

@@ -112,6 +112,8 @@ in {
               "exec --no-startup-id ${config.launcherCommand}";
             "${modifier}+Shift+s" =
               "exec --no-startup-id ${config.systemdSearch}";
+            "${modifier}+Shift+a" =
+              "exec --no-startup-id ${config.audioSwitchCommand}";
             "Mod1+Tab" = "exec --no-startup-id ${config.altTabCommand}";
             "${modifier}+Shift+c" = "reload";
             "${modifier}+Shift+r" = "restart";

modules/nixos/graphical/rofi.nix

@@ -155,7 +155,16 @@
     altTabCommand = "${
         config.home-manager.users.${config.user}.programs.rofi.finalPackage
       }/bin/rofi -show window -modi window";
-
+    audioSwitchCommand = "${
+        (pkgs.extraLib.mkScript {
+          name = "switch-audio";
+          file = ./rofi/pulse-sink.sh;
+          env = [
+            pkgs.ponymix
+            config.home-manager.users.${config.user}.programs.rofi.finalPackage
+          ];
+        })
+      }/bin/switch-audio";
   };
 
 }

modules/nixos/graphical/rofi/pulse-sink.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+# Credit: https://gist.github.com/Nervengift/844a597104631c36513c
+
+sink=$(
+    ponymix -t sink list |
+        awk '/^sink/ {s=$1" "$2;getline;gsub(/^ +/,"",$0);print s" "$0}' |
+        rofi -dmenu -p 'pulseaudio sink:' -location 6 -width 100 |
+        grep -Po '[0-9]+(?=:)'
+) &&
+    ponymix set-default -d "$sink" &&
+    for input in $(ponymix list -t sink-input | grep -Po '[0-9]+(?=:)'); do
+        echo "$input -> $sink"
+        ponymix -t sink-input -d "$input" move "$sink"
+    done