Export generator flavor to gyp scripts

pylib/gyp/__init__.py

Index: pylib/gyp/__init__.py
diff --git a/pylib/gyp/__init__.py b/pylib/gyp/__init__.py
index b10d97a93bd0d57c847b4b52d6857dc3ed0a1243..7b4c5c319bd83d1670e80d1192718f5ae2b5a92a 100755
--- a/pylib/gyp/__init__.py
+++ b/pylib/gyp/__init__.py
@@ -62,6 +62,7 @@ def Load(build_files, format, default_variables={},
   flavor = None
   if '-' in format:
     format, params['flavor'] = format.split('-', 1)
+    flavor = params['flavor']

[justincohen, 2015/03/16 15:12:24]

is it necessary to pull this out into a new variable?  why not just:

default_variables['GENERATOR_FLAVOR'] = params['flavor'] or ""

[sdefresne, 2015/03/16 15:47:05]

The variable already existed (see above) but was never set (which took me some
time to find). And since a dictionary will raise an exception if accessing a
non-existent key, I preferred re-using the variable.

[sdefresne, 2015/03/16 15:49:00]

Done.

 
   default_variables = copy.copy(default_variables)
 
@@ -69,6 +70,7 @@ def Load(build_files, format, default_variables={},
   # named WITH_CAPITAL_LETTERS to provide a distinct "best practice" namespace,
   # avoiding collisions with user and automatic variables.
   default_variables['GENERATOR'] = format
+  default_variables['GENERATOR_FLAVOR'] = flavor or ""
 
   # Format can be a custom python file, or by default the name of a module
   # within gyp.generator.