fix paths (and regex for paths) comparison issues (#1592)

* add os.path.normcase for return value of Logger.FindCaller, escape windows path delimiter for regex comparison

* escape os path separator for regular expression comparison

* use os.path.sep to indicate path separator

* use re.escape to escape metacharacters

* apply escaping only when the string is used for comparison

test/test_rospy/test/unit/test_rospy_core.py

@@ -178,7 +178,7 @@ def lvl2loglvl_stream(lvl):
                         '[0-9]*\.[0-9]*',
                         '[0-9]*',
                         'rosout',
-                        this_file,
+                        re.escape(this_file),
                         '[0-9]*',
                         'TestRospyCore.test_loggers',
                         '/unnamed',

tools/rosgraph/src/rosgraph/roslogging.py

@@ -55,6 +55,7 @@ def findCaller(self, dummy=False): # Dummy second arg to match Python3 function
         file name, line number, and function name with class name if possible.
         """
         file_name, lineno, func_name = super(RospyLogger, self).findCaller()[:3]
+        file_name = os.path.normcase(file_name)
 
         f = inspect.currentframe()
         if f is not None:

tools/rosgraph/test/test_roslogging.py

@@ -35,6 +35,7 @@
 from StringIO import StringIO
 import sys
 
+import re
 from nose.tools import assert_regexp_matches
 import rosgraph.roslogging
 
@@ -109,7 +110,7 @@ def test_rosconsole__logging_format():
                 '[0-9]*\.[0-9]*',
                 '[0-9]*',
                 'rosout',
-                this_file,
+                re.escape(this_file),
                 '[0-9]*',
                 function,
                 # depending if rospy.get_name() is available