gentree.py: keep patch headers for patch refresh

Without this change we were removing patch headers
when refreshing patches.

Cc: techtonik@gmail.com
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/gentree.py b/gentree.py
index 04ce0e36..9d0f3ae5 100755
--- a/gentree.py
+++ b/gentree.py
@@ -401,7 +401,9 @@ def process(kerneldir, outdir, copy_list_file, git_revision=None,
             return 2
 
         if args.refresh:
-            pfilef = open(pfile + '.tmp', 'w')
+            pfilef = open(pfile + '.tmp', 'a')
+            pfilef.write(p.top_header)
+            pfilef.flush()
             for patchitem in p.items:
                 patched_file = '/'.join(patchitem.source.split('/')[1:])
                 fullfn = os.path.join(args.outdir, patched_file)