Add git backup script

backup/backup_git.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# e.g. 0 0 * * * /home/nathan/scripts/backup/backup_git.sh -d /srv/git -b /srv/dev-disk-by-uuid-d9f9e8fd-c473-450e-919e-c43200a6ac4a/gitBackup/ -r nathan@alphavps.aney.co.uk -R ~/backups/git/lilman/
+
+while getopts s:d:b:r:R: flag
+do
+	case "${flag}" in
+	    d) DATA=${OPTARG};;
+	    b) BACKUPDIR=${OPTARG};;
+	    r) REMOTE=${OPTARG};;
+	    R) REMOTEBACKUP=${OPTARG};;
+	esac
+done
+
+mkdir -p $BACKUPDIR
+
+# Incremental backup of the directory locally
+rdiff-backup $DATA $BACKUPDIR
+# Don't keep backups over 1W. In case of accidental/malicious deletes overnight 
+rdiff-backup --remove-older-than 2W $BACKUPDIR
+
+# Make offsite backup
+ssh $REMOTE mkdir -p $REMOTEBACKUP
+
+# Copy the incremental backup accross
+rsync -az -e ssh \
+	--delete \
+	$BACKUPDIR \
+	$REMOTE:$REMOTEBACKUP 
+