Git repo backup script

backup-repo.sh

#!/bin/sh

# Usage:
# ./backup-repo.sh /path/to/reponame
#
# Result:
# /backup/reponame/reponame.YYYY-MM-DD.HHMMSS.tar

if [ ! -d "$1" ]; then
        echo "'$1' is not a directory!"
	echo "Usage:"
	echo "./backup-repo.sh /path/to/reponame"
        exit 1
fi

REPO_DIR=${1%/}
REPO_NAME=${REPO_DIR##*/}
LOG=/var/log/gitbot/$REPO_NAME.log
DATE=`date +%Y-%m-%d.%H%M%S`
BACKUP_DIR=/backup/$REPO_NAME
BACKUP=$BACKUP_DIR/$REPO_NAME.$DATE.tar
MIN_DAYS=1 # min days to renew backup
MAX_DAYS=30 # max days to erase old backup

if [ `find $BACKUP_DIR -ctime -$MIN_DAYS -name '*.tar' | wc -l` -gt 0 ]; then
	echo "Backup already done within $MIN_DAYS days."
	exit 0;
fi;

# use --exclude-vcs instead if your tar supports it
tar -cf $BACKUP $REPO_DIR --exclude $REPO_DIR/.git

if [ -s $BACKUP  ] && [ $MAX_DAYS -gt 0 ]; then
	find $BACKUP_DIR -ctime +$MAX_DAYS -name '*.tar'  -exec rm -f {} \;
fi;