[opy] -emit-docstring=0 will also remove the module docstring.

For some reason this workgs on demo/docstring.py, but not on
core/args.py.

I'm still looking into that bug.  It might be a good use case for the
ddmin algorithm, since I have a minimal test case that works and a
real-world one that doesn't.

opy/compiler2/pycodegen.py

@@ -1319,7 +1319,7 @@ def _Start(self):
         self.set_lineno(self.klass)
         self.emit("LOAD_GLOBAL", "__name__")
         self.storeName("__module__")
-        if self.klass.doc:
+        if self.klass.doc and self.ctx.comp_opt.emit_docstring:
             self.emit("LOAD_CONST", self.klass.doc)
             self.storeName('__doc__')
 

opy/demo/docstring.py

@@ -1,9 +1,9 @@
 #!/usr/bin/python
 """
-docstring.py
+module DOCSTRING
 """
 class Foo(object):
-  """class."""
+  """class DOCSTRING"""
   def inc(self, x):
-    """inc by one"""
+    """func DOCSTRING"""
     return x + 1

opy/opy_main.py

@@ -338,7 +338,7 @@ def OpyCommandMain(argv):
     with open(py_path) as f:
       co = compiler.Compile(f, opt, 'exec')
 
-    log("Compiled to %d bytes of bytecode", len(co.co_code))
+    log("Compiled to %d bytes of top-level bytecode", len(co.co_code))
 
     # Write the .pyc file
     with open(out_path, 'wb') as out_f:
@@ -355,7 +355,7 @@ def OpyCommandMain(argv):
     with open(py_path) as f:
       co = compiler.Compile(f, opt, 'ovm')
 
-    log("Compiled to %d bytes of bytecode", len(co.co_code))
+    log("Compiled to %d bytes of top-level bytecode", len(co.co_code))
     # Write the .pyc file
     with open(out_path, 'wb') as out_f:
       if 1:
@@ -412,7 +412,7 @@ def OpyCommandMain(argv):
       with open(path) as f:
         co = compiler.Compile(f, opt, 'exec')
 
-      log("Compiled to %d bytes of bytecode", len(co.co_code))
+      log("Compiled to %d bytes of top-level bytecode", len(co.co_code))
       v.show_code(co)
 
     else:  # assume pyc_path