From f3b02b4d6f069eaff3977bc061b6ab3ffb6baa8b Mon Sep 17 00:00:00 2001
From: Pedro Alvarez <pedro.alvarez@codethink.co.uk>
Date: Thu, 16 Oct 2014 17:25:03 +0000
Subject: Add force flag to 'mkfs.btrfs'

This way when deploying to a device it will format
it without asking the user if the device already
has format.
---
 morphlib/writeexts.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/morphlib/writeexts.py b/morphlib/writeexts.py
index c78fe09e..86dc4b61 100644
--- a/morphlib/writeexts.py
+++ b/morphlib/writeexts.py
@@ -224,7 +224,7 @@ class WriteExtension(cliapp.Application):
     def mkfs_btrfs(self, location):
         '''Create a btrfs filesystem on the disk.'''
         self.status(msg='Creating btrfs filesystem in %s' % location)
-        cliapp.runcmd(['mkfs.btrfs', '-L', 'baserock', location])
+        cliapp.runcmd(['mkfs.btrfs', '-f', '-L', 'baserock', location])
 
     def get_uuid(self, location):
         '''Get the UUID of a block device's file system.'''
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