A Sync/BackUp script

backup_settings.sh

#!/bin/bash

#########################################################################
#                                                                       #
# File: backup_settings.sh                    A sync/backup script      #
#                                                                       #
#                                   ++++++++++++++++++++++++++++++      #
# Copyright (C) 2013                + Author:  Foivos S. Zakkak  +      #
#                                   + Website: foivos.zakkak.net +      #
#                                   + Email:   foivos@zakkak.net +      #
#                                   ++++++++++++++++++++++++++++++      #
#                                                                       #
# This program is free software: you can redistribute it and/or modify  #
# it under the terms of the GNU General Public License as published by  #
# the Free Software Foundation, either version 3 of the License, or (at #
# your option) any later version.                                       #
#                                                                       #
# This program is distributed in the hope that it will be useful, but   #
# WITHOUT ANY WARRANTY; without even the implied warranty of            #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     #
# General Public License for more details.                              #
#                                                                       #
# You should have received a copy of the GNU General Public License     #
# along with this program.  If not, see <http://www.gnu.org/licenses/>. #
#                                                                       #
#########################################################################

########################################################################
#                                                                      #
# This is a script to sync configuration files between two directories #
# (HOME and BACKUP_DIR)                                                #
#                                                                      #
# The files are first diffed and if they are not same the most recent  #
# overwrites the older one.                                            #
#                                                                      #
# Limitations: The script does not adapt to file deletions             #
#                                                                      #
########################################################################

IFS=$(echo -en "\n\b")
BACKUP_DIR=$HOME/"SparkleShare/settings"

mkdir -p $BACKUP_DIR
chmod 700 $BACKUP_DIR

FILES="
Documents/zakkak.vcf
.bash_aliases
.bash_profile
.zshrc
.indent.pro
.tmux.conf
.latexmkrc
.emacs
.emacs.el
.dircolors
.gitconfig
.gitignore
.mbsyncrc
.fonts.conf"

FOLDERS="
.config/htop
.fonts
bin"

CURR_DIR=$(pwd)
cd $HOME
for d in $FOLDERS
do
    for sd in `find $d -type f 2> /dev/null`
    do
        FILES+="
${sd}" # DON'T indent this
    done
done

cd $CURR_DIR
cd $BACKUP_DIR
for d in $FOLDERS
do
    for sd in `find $d -type f 2> /dev/null`
    do
        # if [[ ! "$FILES" =~ "$sd" ]] # This check is too expensive
        # then
            FILES+="
${sd}" # DON'T indent this
        # fi
    done
done

# Eliminate duplicates
IFS=
FILES=`echo -n $FILES | sort | uniq`
IFS=$(echo -en "\n\b")

cd $CURR_DIR
for f in $FILES
do
    LOCAL="$HOME/$f"
    BACKUP="$BACKUP_DIR/$f"
    diff $LOCAL $BACKUP 2> /dev/null > /dev/null
    RES=$?
    if [ $RES -ne 2 ] # If diff didn't fail (both files exist)
    then
        if [ $RES -eq 1 ] # if there are diffs between the files
        then
            # If local is newer than backup copy to backup else fetch
            # from backup
            if [ $LOCAL -nt $BACKUP ]
            then
                cp $LOCAL $BACKUP
                echo -e "\033[33;1m --> \033[m" $f
            else
                cp $BACKUP $LOCAL
                echo -e "\033[31;1m <-- \033[m" $f
            fi
        fi
    else
        if [ -f $LOCAL ]
        then
            DIR=${BACKUP%/*}
            if [ ! -d $DIR ]
            then
                mkdir -p $DIR
            fi
            cp $LOCAL $BACKUP
            echo -e "\033[33;1m --> \033[m" $f
        elif [ -f $BACKUP ]
        then
            DIR=${LOCAL%/*}
            if [ ! -d $DIR ]
            then
                mkdir -p $DIR
            fi
            cp $BACKUP $LOCAL
            echo -e "\033[31;1m <-- \033[m" $f
        else
            echo -e "\033[37;41;1mFile not found:\033[m" $f
        fi
    fi
done