Fix invalid escape sequence warnings

ambuild2/frontend/v2_2/tools/fxc.py

@@ -137,7 +137,7 @@ def fxc_helper_tool():
     var_prefixes = []
 
     for source_file in args.sources:
-        m = re.match('([^.]+)\.([^.]+)\.([^.]+)\.h', source_file)
+        m = re.match(r'([^.]+)\.([^.]+)\.([^.]+)\.h', source_file)
         var_prefix = m.group(2)
         if m is None:
             raise Exception('Sources must be in objname.varprefix.entrypoint.h form')

ambuild2/frontend/v2_2/vs/export_vcxproj.py

@@ -67,10 +67,10 @@ def export_body(cm, node, xml):
             if win_sdk_version:
                 xml.tag('WindowsTargetPlatformVersion', win_sdk_version.rstrip('\\'))
 
-    xml.tag('Import', Project = '$(VCTargetsPath)\Microsoft.Cpp.Default.props')
+    xml.tag('Import', Project = '$(VCTargetsPath)\\Microsoft.Cpp.Default.props')
     export_configuration_properties(node, xml)
 
-    xml.tag('Import', Project = '$(VCTargetsPath)\Microsoft.Cpp.props')
+    xml.tag('Import', Project = '$(VCTargetsPath)\\Microsoft.Cpp.props')
     with xml.block('ImportGroup', Label = 'ExtensionSettings'):
         pass
     export_configuration_user_props(node, xml)
@@ -87,7 +87,7 @@ def export_body(cm, node, xml):
 
     export_source_files(node, xml)
 
-    xml.tag('Import', Project = '$(VCTargetsPath)\Microsoft.cpp.targets')
+    xml.tag('Import', Project = '$(VCTargetsPath)\\Microsoft.cpp.targets')
     with xml.block('ImportGroup', Label = 'ExtensionTargets'):
         pass
 
@@ -137,8 +137,8 @@ def export_configuration_user_props(node, xml):
         condition = condition_for(builder)
         with xml.block('ImportGroup', Condition = condition, Label = 'PropertySheets'):
             xml.tag('Import',
-                    Project = "$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props",
-                    Condition = "exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')",
+                    Project = "$(UserRootDir)\\Microsoft.Cpp.$(Platform).user.props",
+                    Condition = "exists('$(UserRootDir)\\Microsoft.Cpp.$(Platform).user.props')",
                     Label = "LocalAppDataPlatform")
 
 def export_configuration_paths(node, xml):

ambuild2/util.py

@@ -439,10 +439,10 @@ def ParseGCCDeps(text):
     new_text = ''
 
     state = sReadIncludes
-    for line in re.split('\n+', text):
+    for line in re.split(r'\n+', text):
         line = line.replace('\r', '')
         if state == sReadIncludes:
-            m = re.match('[\.!x]\.*\s+(.+)\s*$', line)
+            m = re.match(r'[\.!x]\.*\s+(.+)\s*$', line)
             if m == None:
                 state = sLookForIncludeGuard
             else:
@@ -494,13 +494,13 @@ def ParseFXCDeps(out):
     new_text = ''
     for line in out.split('\n'):
         # The inclusion pattern is probably translated, but for now we ignore this possibilty.
-        m = re.match('Opening file \[.*\], stack top \[.*\]', line)
+        m = re.match(r'Opening file \[.*\], stack top \[.*\]', line)
         if m is not None:
             continue
-        m = re.match('Current working dir \[.*\]', line)
+        m = re.match(r'Current working dir \[.*\]', line)
         if m is not None:
             continue
-        m = re.match('Resolved to \[(.+)\]', line)
+        m = re.match(r'Resolved to \[(.+)\]', line)
         if m is not None:
             deps.append(m.group(1).strip())
             continue
@@ -512,7 +512,7 @@ def ParseSunDeps(text):
     deps = set()
     new_text = ''
 
-    for line in re.split('\n+', text):
+    for line in re.split(r'\n+', text):
         name = line.lstrip()
         if os.path.isfile(name):
             deps.add(name)
@@ -767,4 +767,4 @@ def BuildDictFromTuple(tup):
 
 # Replace anything from a filename that doesn't convert to an identifier.
 def MakeLexicalFilename(file):
-    return re.sub('[^a-zA-Z0-9_]+', '_', file)
+    return re.sub(r'[^a-zA-Z0-9_]+', '_', file)