add sleep_until

.config/shell/functions/sleep-until

@@ -0,0 +1,13 @@
+#!/bin/sh
+# Usage: sleep_until <time>
+# Ex: sleep_until 3:00 pm
+
+sleep_until() {
+   if [ -n "$1" ] && date --date="$*" > /dev/null 2>&1; then
+      echo "Sleeping until:  $(date --date="$*")"
+
+      sleep $(( $(date -f - +%s- <<< "$*"$'\nnow') 0 ))
+   else
+      echo "Please input a date"
+   fi
+}