#!/bin/bash
# archive.sh - Datestamp Files
# Author: Sean B. Palmer, inamidst.com

function doc() { 
   echo "Usage: $0 [options] <filename> [<directory>]"
   echo "Copies filename to basename-isotime.ext"
   echo "   -h --help       Print help information"
   echo "   -m --modified   Use mtime not current time"
}

case $1 in 
   -h|--help) doc; exit;; 
   -m|--modified) shift; DATE=$(stat -c %y $1 | cut -d' ' -f1);; 
   *) DATE=$(date -u +%Y%m%d-%H%M%S);; 
esac

# Check that the argument is a file
if [[ ! -f $1 || -z $1 ]]
then echo "Error: <$1> isn't a file"
     exit 1
fi

# Get the filename, base, and extension
FN=$(basename $1)
BASE=${FN%%.*}
case $FN in
   *.*) EXT=${FN#*.};;
esac

# Only decorate these vars if they're non-empty
BASE=${BASE:+${BASE}-}
EXT=${EXT:+.${EXT}}

# Select the directory to copy to
if [[ -n $2 && -d $2 ]]
then DIR=${2%/}/
else DIR=${1%$FN}
fi

# Copy the file to the datestamped version
TARGET=${DIR}${BASE}${DATE}${EXT}
cp -ip $1 $TARGET && echo Copied to: $TARGET

# [EOF]