Tile X11 windows from the command-line with xdotool

xdotool tile matching windows

tile_emulators() {
  DGEO=$(xdotool getdisplaygeometry)
  index=0
  for p in $( xdotool search 'enymotion' getwindowpid %@|sort |uniq ) ; do
    GEOM=$(perl -le "
      %A=(tot=>$EMULATORS, ix=>$index, dx=>${DGEO% *}, dy=>${DGEO#* });"'
      $sq = int(sqrt($A{tot})); $sq++ if sqrt($A{tot}) > $sq;
      $sx=$A{dx}/$sq; $sy=$A{dy}/$sq;
      print "windowsize $sx $sy windowmove ",($A{ix} % $sq) * $sx," ",int($A{ix} / $sq) * $sy'
    );
    eval "xdotool search --all --pid $p --onlyvisible --class 'enymotion' $GEOM";
    index=$[ index + 1 ];
  done
}

Illegal division by zero =/ Too many windows?

        %A=(tot=>, ix=>0, dx=>1920, dy=>1080);
        $sq = int(sqrt($A{tot})); $sq++ if sqrt($A{tot}) > $sq;
        $sx=$A{dx}/$sq; $sy=$A{dy}/$sq;
        print "windowsize $sx $sy windowmove ",($A{ix} % $sq) * $sx," ",int($A{ix} / $sq) * $sy'
Illegal division by zero at -e line 4.
+ GEOM=

Update: I think my $EMULATORS env var is empty.