xwaitforwindow: init

krebs/5pkgs/simple/xwaitforwindow.nix

@@ -0,0 +1,15 @@
+{ writeDashBin, xdotool, xorg }:
+writeDashBin "xwaitforwindow" ''
+  # usage: xwaitforwindow ARGS
+  # see xdotool search for possible ARGS
+  # example: xwaitforwindow -name WINDOWNAME
+  set -efu
+
+  if id=$(${xdotool}/bin/xdotool search "$@"); then
+    printf 'waiting for window %#x\n' "$id" >&2
+    exec ${xorg.xprop}/bin/xprop -spy -id "$id" >/dev/null
+  else
+    printf 'no window found with xdotool search %s\n' "$*" >&2
+    exit 1
+  fi
+''