bob: correctly encode regex

Use raw strings to stop relying on the fact that unrecognized escape
sequences in strings are left unchanged (e.g. "\S"). This behaviour was
deprecated in Python 3.6 and will eventually lead to a SyntaxError in
the future.

Author: jkloetzke

pym/bob/cmds/build/build.py

@@ -39,7 +39,7 @@ def _downloadArgument(arg):
             return arg
         raise argparse.ArgumentTypeError("{} invalid.".format(arg))
     def _downloadLayerArgument(arg):
-        if re.match('^(yes|no|forced)=\S+$', arg):
+        if re.match(r'^(yes|no|forced)=\S+$', arg):
             return arg
         raise argparse.ArgumentTypeError("{} invalid.".format(arg))
 

pym/bob/generators/VisualStudio.py

@@ -42,7 +42,7 @@
 Project("{{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}}") = "{NAME}", "{NAME}\\{NAME}.vcxproj", "{{{GUID}}}"
 EndProject"""
 
-PROJECT_TEMPLATE = """\
+PROJECT_TEMPLATE = r"""\
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">

test/test_input_stringparser.py

@@ -167,11 +167,11 @@ def testMatch(self):
         self.assertEqual(funMatch(["xyyz", "^xy{1}z$"]), "false")
         self.assertEqual(funMatch(["abc", "."]), "true")
         self.assertEqual(funMatch(["abc", ".+"]), "true")
-        self.assertEqual(funMatch([".", "\."]), "true")
-        self.assertEqual(funMatch(["a.", "^\."]), "false")
-        self.assertEqual(funMatch(["(a)", "\(a"]), "true")
-        self.assertEqual(funMatch(["(a)", "\(a$"]), "false")
-        self.assertEqual(funMatch(["\\a)", "\\\\a\)"]), "true")
+        self.assertEqual(funMatch([".", r"\."]), "true")
+        self.assertEqual(funMatch(["a.", r"^\."]), "false")
+        self.assertEqual(funMatch(["(a)", r"\(a"]), "true")
+        self.assertEqual(funMatch(["(a)", r"\(a$"]), "false")
+        self.assertEqual(funMatch([r"\a)", r"\\a\)"]), "true")
         self.assertEqual(funMatch(["ABC", "a", "i"]), "true")
         self.assertRaises(ParseError, funMatch, ["a"])
         self.assertRaises(ParseError, funMatch, ["a","b","x"])