TEMP: add more logging to path rewriter

Author: d10c

python/extractor/semmle/projectlayout.py

@@ -63,6 +63,7 @@ def __init__(self, lines, logger):
         for testing. Usually, use the 'load' function."""
 
         self._project = None
+        self._logger = logger
         # Map from virtual path prefixes (following the '#' in the
         # project-layout)  to the sequence of patterns that fall into that
         # section. Declared as an OrderedDict since iteration order matters --
@@ -155,7 +156,9 @@ def artificial_path(self, path):
             if rewrite is not None:
                 rewritten = rewrite.rewrite(path);
             if rewritten is not None:
+                self._logger.info("Rewriting path %s to %s", path, rewritten)
                 return rewritten
+        self._logger.info("Not rewriting path %s", path)
         return None
 
     def include_file(self, path):