sway: structure scripts, add helpers in separate file

bin/volume

@@ -1,13 +1,9 @@
 #!/bin/bash
-sink=$(pacmd list-sinks | grep "* index" | grep -oE '[0-9]*')
-cmd=""
-app="pavucontrol"
-
-if [ -z "$sink" ]; then
-  echo "ERROR: invalid sink: \"$sink\""
-  exit 1
-fi
+source $HOME/.config/sway/bin/helpers
+SINK=$(pacmd list-sinks | grep "* index" | grep -oE '[0-9]*')
+APP="pavucontrol"
 
+##  helpers
 function _toggle() {
   a=$1
   if [ $(pgrep $a) ]; then
@@ -17,20 +13,28 @@ function _toggle() {
   fi
 }
 
+## main
+if [ -z "$SINK" ]; then
+  _log VOLUME ERROR args: $*
+  exit 1
+fi
+
 case $1 in
   d*)
-    pactl set-sink-volume $sink -5%
+    pactl set-sink-volume $SINK -5%
     ;;
   i*)
-    pactl set-sink-volume $sink +5%
+    pactl set-sink-volume $SINK +5%
     ;;
   m*)
-    pactl set-sink-mute $sink toggle
+    pactl set-sink-mute $SINK toggle
     ;;
   gui)
-    _toggle $app
+    _check_app $APP
+    _toggle $APP
     ;;
   *)
-    echo "ERROR: invalid command: \"$1\""
+    echo "invalid command: \"$1\""
+    echo "arguments: [decrease|increase|mute|gui]"
     ;;
 esac