#! /bin/bash
# Add datestamp to JPEG or EXIF file
#
# Usage: exfiSetDate date file [file...]
#
#   date	- date to add.  Any format accepted by date(1).
#   file	- file to have date set
#
# Author: George Jones <gmj@pobox.com>
#
# Date: Sat Dec 19 08:57:32 2015
#
# Prereqs:
#    - Linux file(1) utility for typing
#    - http://owl.phy.queensu.ca/~phil/exiftool/ for setting dates
#

set -e;
set -u; 
#set -x

if [ $# -lt 2 ]
  then
    echo "Usage: $0 date file [file...]" >&2
    exit 1
fi

when="$1"
shift

setToTime=`date --date="$when" --rfc-3339=seconds`
exiftool -overwrite_original_in_place "-DateTimeOriginal='${setToTime}'" $*