#!/bin/bash

# This code should almost never use plain time functions like time.Now(),
# time.Since(), etc, because we should use mockable clock functions instead,
# for the time-related tests to work.
#
# I already wasted some time trying to debug tests which were failing just
# because I accidentally used plain time functions, so I wrote this script to
# to ensure that.
#
# On those rare occassions when we do want plain time functions, we also should
# place the guard comment: YES_I_WANT_PLAIN_TIME. This script will not complain
# about those.

guard="YES_I_WANT_PLAIN_TIME"
path="$1"

if [[ "$path" == "" ]]; then
  echo "Usage: $0 <path>"
  exit 1
fi

grep -r 'time\.\(Now\|After\|Since\|Sleep\|Tick\|Timer\)' "${path}" \
  | grep -v "${guard}"
if [[ "$?" == "0" ]]; then
  echo ""
  echo "^^^"
  echo "Error: found occurrences of plain time functions not guarded with ${guard}"
  exit 1
fi

echo "OK: no occurrences of plain time functions found."
exit 0