scons: deal with generated .py files properly

src/SConscript

@@ -132,15 +132,15 @@ class PySource(SourceFile):
         modpath = '.'.join(modpath)
 
         arcpath = path + [ self.basename ]
-        debugname = self.snode.abspath
-        if not exists(debugname):
-            debugname = self.tnode.abspath
+        abspath = self.snode.abspath
+        if not exists(abspath):
+            abspath = self.tnode.abspath
 
         self.package = package
         self.modname = modname
         self.modpath = modpath
         self.arcname = joinpath(*arcpath)
-        self.debugname = debugname
+        self.abspath = abspath
         self.compiled = File(self.filename + 'c')
         self.assembly = File(self.filename + '.s')
         self.symname = "PyEMB_" + PySource.invalid_sym_char.sub('_', modpath)
@@ -339,9 +339,9 @@ class DictImporter(object):
         source = self.modules[fullname]
         if source.modname == '__init__':
             mod.__path__ = source.modpath
-        mod.__file__ = source.snode.abspath
+        mod.__file__ = source.abspath
 
-        exec file(source.snode.abspath, 'r') in mod.__dict__
+        exec file(source.abspath, 'r') in mod.__dict__
 
         return mod
 
@@ -892,7 +892,7 @@ def objectifyPyFile(target, source, env):
     dst = file(str(target[0]), 'w')
 
     pysource = PySource.tnodes[source[0]]
-    compiled = compile(src, pysource.debugname, 'exec')
+    compiled = compile(src, pysource.abspath, 'exec')
     marshalled = marshal.dumps(compiled)
     compressed = zlib.compress(marshalled)
     data = compressed