backup.sh for mackup

backup.sh

#!/bin/bash

# quick back file or dir via ln into Dropbox for syncing

BACKUPDIR=~/Dropbox/Mackup

PWD=`pwd`

function backup() {

    target=${PWD}/$1;

    echo "Start to backup $target"

    # get filename
    filepath=${target%/*}
    filename=${target##*/}

    if [ -e ${BACKUPDIR}/$filename ]; then
        diffct=`diff $target ${BACKUPDIR}/$filename`
        echo "Find $filename in ${BACKUPDIR}"
        echo "diff >>>"
        echo "$diffct"
        echo "failed!!"
        exit 125
    fi

    # link
    (
        cd $filepath &&
        mv $filename $BACKUPDIR &&
        ln -s ${BACKUPDIR}/$filename $filename
    )
}

if [ "$1" == "" ]; then
    echo "Usage: backup.sh filename"
    exit 126
fi

if [ ! -e $1 ]; then
    echo "Can't find $1"
    exit 127
fi

backup $1

echo "success!!"