ft: moved cables.sh into nix

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"
+