added ignore_version option to rdiff handler to enable you override the version check

ChangeLog

@@ -28,10 +28,11 @@ version 0.9.5 -- unreleased
 	 . Support configuring PGSQLUSER for real, and document it a bit; this
 	   broken support actually prevented pgsql handler to work for VServers
 	   (Closes: #396578)
-	rdiff:
+	rdiff-backup:
 	 . Added cstream support to allow for bandwidth limiting
 	 . Handle "keep = yes" to disable old backups removal (Closes: #424633)
-	 . Ignore rdiff-backup minor versions (thanks Sami Haahtinen)
+	 . Add configuration option to allow you to disable the version check
+	   as in some instances this may be an ok scenario (Closes: #424632)
 	rub
 	 . Fixed typo in rub handler that caused it to not work
 	 . Changed to use lib/vserver code

examples/example.rdiff

@@ -20,6 +20,16 @@
 ## -t option for more information. 62500 bytes = 500 Kb (.5 Mb)
 # bwlimit = 62500
 
+## should backupninja ignore the version differences between source and remote
+## rdiff-backup? (default: no)
+## This could be useful if the version differences between rdiff-backup instances
+## on remote and local side are different, and you are certain there are no
+## problems in using mis-matched versions and want to get beyond this check.
+## An example usage could be the remote side has its authorized_keys configured
+## with command="rdiff-backup --server" to allow for restricted yet automated 
+## password-less backups
+# ignore_version = no
+
 ######################################################
 ## source section
 ## (where the files to be backed up are coming from)

handlers/rdiff.in

@@ -32,12 +32,12 @@ function get_version() {
 	# if user or host is missing, returns the local version.
 	if [ "$#" -lt 2 ]; then
 		debug "$RDIFFBACKUP -V"
-                echo `$RDIFFBACKUP -V | cut -d. -f1,2`
+		echo `$RDIFFBACKUP -V`
 	else
 		local user=$1
 		local host=$2
 		debug "ssh $sshoptions $host -l $user '$RDIFFBACKUP -V'"
-                echo `ssh $sshoptions $host -l $user "$RDIFFBACKUP -V | grep rdiff-backup | cut -d. -f1,2"`
+		echo `ssh $sshoptions $host -l $user "$RDIFFBACKUP -V | grep rdiff-backup"`
 	fi
 }
 
@@ -127,11 +127,13 @@ if [ "$testconnect" = "yes" ] || [ "${test}" -eq 1 ]; then
 	test_connection $destuser $desthost
 fi
 
-# see that rdiff-backup has the same version at the source and destination
-sourceversion=`get_version $sourceuser $sourcehost`
-destversion=`get_version $destuser $desthost`
-if [ "$sourceversion" != "$destversion" ]; then
-	fatal "rdiff-backup does not have the same version at the source and at the destination."
+if [ $ignore_version != "yes" ]; then
+	# see that rdiff-backup has the same version at the source and destination
+	sourceversion=`get_version $sourceuser $sourcehost`
+	destversion=`get_version $destuser $desthost`
+	if [ "$sourceversion" != "$destversion" ]; then
+		fatal "rdiff-backup does not have the same version at the source and at the destination."
+	fi
 fi
 
 # source specific checks