GNU sed to remove color

gsed-rm-color.sh

#!/bin/sh
sed=sed
if [ `uname` == "Darwin" ]; then
  sed=`command -v gsed`
  ret=$?
  if [ "$ret" -ne 0 ]; then
    echo 'GNU sed needs to be installed. Install with: brew install gnu-sed'
    exit $ret
  fi
fi

# Ref: https://stackoverflow.com/questions/17998978/removing-colors-from-output#comment125240462_18000433
$sed -r "s/\x1B\[([0-9]{1,3}(;[0-9]{1,3})*)?[mGK]//g" "$@"