#!/bin/sh
# Copyright 2006 Bellière Ludovic <xrogaan@gmail.com>
# Distributed under the terms of the GNU General Public License v2

# exit on any failures
set -e
# report unset variables
set -u

version="1.0c"
maintainer="xrogaan@gmail.com"

PWD=`pwd`
SVNCMD="svn co"
CMD_ARCH="tar cpsf"
DATE=`date +%Y%m%d`
prog=`basename $0`
CURRENT="$PWD"
TEMPPATH="/tmp/svndatadump_$$"
DUMPPATH="${PWD}/dump"
PATHS=''
ARCHNAME=''
ARCHIVETYPE="gz"
evalopt=false
quietopt=false
userev=false
EXT=''

BLUE=""
CYAN=""
GREEN=""
RED=""
OFF=""


# synopsis: qprint "message"
qprint() {
    $quietopt || echo "$*" >&2
}

# synopsis: mesg "message"
# Prettily print something to stderr, honors quietopt
mesg() {
    qprint " ${GREEN}*${OFF} $*"
}

# synopsis: warn "message"
# Prettily print a warning to stderr
warn() {
    echo " ${RED}* Warning${OFF}: $*" >&2
}

# synopsis: error "message"
# Prettily print an error
error() {
    echo " ${RED}* Error${OFF}: $*" >&2
}

# synopsis: die "message"
# Prettily print an error, then abort
die() {
    [ -n "$1" ] && error "$*"
    qprint
    $evalopt && { echo; echo "false;"; }
    exit 1
}

# synopsis: versinfo
# Display the version information
versinfo() {
    qprint
    qprint "${GREEN}SVN Backup ${version};${OFF}"
    qprint "Copyright 2006 Belliere Ludovic <${maintainer}>; Distributed under the GPL"
    qprint
}

# synopsis: helpinfo
# Display the help information. There's no really good way to use qprint for
# this...
helpinfo() {
    cat >&2 <<EOHELP
    This script will create a dump from your SVN repository. This dump will named svn-[currentDate].[ext].
    By default, the datas will by compressed in gzip format and the archive will be put on dump directory.
    
SYNOPSIS
    $prog [ [${BLUE}-at${OFF} |${BLUE}--archive-type=${OFF}][${CYAN}bz${OFF}|${CYAN}gz${OFF}|${CYAN}tar${OFF}|${CYAN}zip${OFF}] ] [ ${BLUE}--revision${OFF} ${CYAN}ARG${OFF} ] [ ${BLUE}--targets${OFF} ${CYAN}ARG${OFF} ]
    [ ${BLUE}-o${OFF}|${BLUE}--dump${OFF} ${CYAN}PATH${OFF} ] [ ${BLUE}--username${OFF} ${CYAN}ARG${OFF} ] [ ${BLUE}--password${OFF} ${CYAN}ARG${OFF} ] [ ${BLUE}--config-dir${OFF} ${CYAN}ARG${OFF} ] [ ${BLUE}--limit${OFF} ${CYAN}ARG${OFF} ] ${CYAN}URL${OFF}
COMMANDS
    ${BLUE}-at${OFF} [${BLUE}--archive-type${OFF}] ${CYAN}FMT${OFF}                Create an archive of the backup.
						    FMT can be one of:
							 bz2 : Creates a bzip2 compressed tar file.
							 gz  : Creates a gzip compressed tar file.
							 tar ; Creates a compressed tar file.
							 zip : Creates a compressed zip file.
    ${BLUE}?${OFF} [${BLUE}--help${OFF}|${BLUE}-h${OFF}]                           Get the current message.
    ${BLUE}-o${OFF} [${BLUE}--dump${OFF}]                             Set the dump directory.
    
    
    command: -r, --revision, --no-auth-cache, --username, --password,
    --no-auth-cache, --non-interactive, --config-dir, -q, --quiet,
    --non-recursive, --ignore-externals and -N
    (see \`svn help log' for more information).
EOHELP
}

while [ $# -gt 0 ]
do
  case "$1" in
	--archive-type|-at)
		ARCHIVETYPE="$2";
		shift 2 || die "$prog: option requires an argument -- ${CYAN}$1${OFF}";
	;;
	--archive-type=*)
		ARCHIVETYPE=`echo "$1" | sed 's/^--[a-z-]*=//'`
		shift
	;;
	-o|--dump)
		DUMPPATH="$2";
		shift 2 || die "$prog: option requires an argument -- ${CYAN}$1${OFF}";
	;;
	--dump=*)
		DUMPPATH=`echo "$1" | sed 's/^--[a-z-]*=//'`
		shift
	;;
	-r|--revision|--username|--password|--config-dir)
		# add these as extra options to the command (with argument)
		arg=`echo "$2" | sed "s/'/'\"'\"'/g"`
		SVNCMD="$SVNCMD $1 '$arg'"
		if [ "$arg" -eq "-r" -o "$arg" -eq "--revision" ]; then
			EXT="${EXT}-r$arg"
			userev=true
		fi
		shift 2 || die "$prog: option requires an argument -- ${CYAN}$1${OFF}";
	;;
	-N|--non-recursive|-q|--quiet|--non-interactive|--no-auth-cache|--ignore-externals)
		# add these as extra options to the command (with argument)
		if [ "$1" -eq "-q" -o "$1" -eq "--quiet"]; then
			quietopt=true
		fi
		SVNCMD="$SVNCMD $1"
		shift
	;;
	-h|--help|?)
		# versinfo uses qprint, which honors --quiet
		versinfo
		helpinfo
		exit 0
	;;
	-*)
		die "invalid option -- ${CYAN}$1${OFF}
	Try \`$prog --help' for more information."
	;;
	*)
		arg=`echo "$1" | sed "s/'/'\"'\"'/g"`
		SVNCMD="$SVNCMD '$arg'"
		PATHS="'$arg'"
		shift
	;;
  esac
done

case $ARCHIVETYPE in
	bz|bz2)
		EXT="${EXT}.bz2"
		CMD_ARCH="${CMD_ARCH}j"
	;;
	gz|gzip)
		EXT="${EXT}.tar.gz"
		CMD_ARCH="${CMD_ARCH}z"
	;;
	tar)
		EXT="${EXT}.tar"
	;;
	zip)
		EXT="${EXT}.zip"
		CMD_ARCH="zip -6 -r"
	;;
	*)
	die "invalid argument for ${CYAN}--archive-type${OFF} : $ARCHIVETYPE
	Try \`$prog --help' for more information."
	;;
esac

if [ ! -d $TEMPPATH ]; then
	echo -n " * Creating temporary directory ${BLUE}${TEMPPATH}${OFF}..."
	mkdir $TEMPPATH
	echo " ${GREEN}done${OFF}"

	echo -n " * Getting repository data ${BLUE}${PATHS}${OFF}..."
	SVNCMD="$SVNCMD $TEMPPATH"
	eval $SVNCMD
	echo " ${GREEN}done${OFF}"
else
	die "Directory ${BLUE}${TEMPPATH}${OFF} already exists.
	Try 'rm -rf ${TEMPPATH}' and restart ${prog}."
fi

#compress cmd
if [ $userev ]; then
ARCHNAME="svn${EXT}"
else
ARCHNAME="svn-${DATE}${EXT}"
fi
CMD_ARCH="${CMD_ARCH} $DUMPPATH/${ARCHNAME} ${TEMPPATH}"

# remove all directory .svn/, set chmod 775 for all directory and chmod -x for all php files
find $TEMPPATH -depth -type d -name .svn -exec rm -fr {} \;
find $TEMPPATH -type d -exec chmod 775 {} \;
find $TEMPPATH -type f -name "*.php" -exec chmod -x {} \;

#Create the dump directory if dont exists
if [ ! -d '$DUMPPATH' ]; then
	mkdir "$DUMPPATH"
fi

cd $DUMPPATH

if [ -f  "$DUMPPATH/${ARCHNAME}" ]; then
	warn "$DUMPPATH/${ARCHNAME} already exists, deleting ..."
	rm -f "$DUMPPATH/${ARCHNAME}"
fi

echo -n " * Creating dump archive ${BLUE}$DUMPPATH/${ARCHNAME}${OFF} ..."
eval $CMD_ARCH
echo " ${GREEN}done${OFF}"
echo;

cd $CURRENT
rm -rf $TEMPPATH

#EOF