utils: checkstyle.py: Use r'' strings for regular expressions

It's a good practice to use r'' strings for regular expressions in
Python, to avoid unexpected interaction with string escape sequences.
Use them globally. This allows simplifying escaping in one of the
regular expression strings.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/utils/checkstyle.py b/utils/checkstyle.py
index 84f44a42..2ab7e50f 100755
--- a/utils/checkstyle.py
+++ b/utils/checkstyle.py
@@ -569,7 +569,7 @@ class IncludeChecker(StyleChecker):
                'limits', 'locale', 'setjmp', 'signal', 'stdarg', 'stddef',
                'stdint', 'stdio', 'stdlib', 'string', 'time', 'uchar', 'wchar',
                'wctype')
-    include_regex = re.compile('^#include <c([a-z]*)>')
+    include_regex = re.compile(r'^#include <c([a-z]*)>')
 
     def __init__(self, content):
         super().__init__()
@@ -632,7 +632,7 @@ class MesonChecker(StyleChecker):
 
 class Pep8Checker(StyleChecker):
     patterns = ('*.py',)
-    results_regex = re.compile('stdin:([0-9]+):([0-9]+)(.*)')
+    results_regex = re.compile(r'stdin:([0-9]+):([0-9]+)(.*)')
 
     def __init__(self, content):
         super().__init__()
@@ -665,7 +665,7 @@ class Pep8Checker(StyleChecker):
 
 class ShellChecker(StyleChecker):
     patterns = ('*.sh',)
-    results_line_regex = re.compile('In - line ([0-9]+):')
+    results_line_regex = re.compile(r'In - line ([0-9]+):')
 
     def __init__(self, content):
         super().__init__()
@@ -753,7 +753,7 @@ class CLangFormatter(Formatter):
 class DoxygenFormatter(Formatter):
     patterns = ('*.c', '*.cpp')
 
-    return_regex = re.compile(' +\\* +\\\\return +[a-z]')
+    return_regex = re.compile(r' +\* +\\return +[a-z]')
 
     @classmethod
     def format(cls, filename, data):
@@ -813,7 +813,7 @@ class DPointerFormatter(Formatter):
 class IncludeOrderFormatter(Formatter):
     patterns = ('*.cpp', '*.h')
 
-    include_regex = re.compile('^#include (["<])([^">]*)([">])')
+    include_regex = re.compile(r'^#include (["<])([^">]*)([">])')
 
     @classmethod
     def format(cls, filename, data):