[dpdk-ci] [PATCH 2/2] guess_git_tree: edge case and style changes

[ohilyard at iol.unh.edu]

From: Owen Hilyard <ohilyard at iol.unh.edu>

The import statements in the file have been moved below the module doc
comment per PEP 257.

A sanity check has been added to find_filenames. Occasionally, due to
how the community lab internally handles getting patches from
patchworks, a patch will result in no diff. This patch adds handling for
this case.

Signed-off-by: Owen Hilyard <ohilyard at iol.unh.edu>
---
 tools/guess_git_tree.py | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/tools/guess_git_tree.py b/tools/guess_git_tree.py
index c9eef39..63892e1 100755
--- a/tools/guess_git_tree.py
+++ b/tools/guess_git_tree.py
@@ -1,20 +1,8 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # SPDX-License-Identifier: (BSD-3-Clause AND GPL-2.0-or-later AND MIT)
 # Copyright 2019 Mellanox Technologies, Ltd
 
-import os
-import sys
-import re
-import argparse
-import fnmatch
-
-from requests.exceptions import HTTPError
-
-from git_pw import config
-from git_pw import api
-from git_pw import utils
-
 """
 Description:
 This script uses the git-pw API to retrieve Patchwork's
@@ -49,6 +37,17 @@
     tree = maintainers.get_tree(files)
 """
 
+import os
+import sys
+import re
+import argparse
+import fnmatch
+
+from requests.exceptions import HTTPError
+
+from git_pw import config
+from git_pw import api
+from git_pw import utils
 
 MAINTAINERS_FILE_PATH = os.environ.get('MAINTAINERS_FILE_PATH')
 if not MAINTAINERS_FILE_PATH:
@@ -93,6 +92,11 @@ def find_filenames(diff):
             - Moved _filename_re into the method.
             - Reduced newlines.
         """
+        # sanity check diff
+        # for patches without any diff, it will try to run diff.replace
+        # while diff is None. just return an empty list
+        if diff is None:
+            return []
         _filename_re = re.compile(r'^(---|\+\+\+) (\S+)')
         # normalise spaces
         diff = diff.replace('\r', '')
-- 
2.30.2