Fix setup.py for sdist

setup.py

@@ -1,6 +1,20 @@
 #!/usr/bin/env python
 
 from distutils.core import setup
+from distutils.command import sdist
+
+
+class mysdist(sdist.sdist):
+
+    def add_defaults(self):
+        sdist.sdist.add_defaults(self)
+        if self.distribution.has_pure_modules():
+            build_py = self.get_finalized_command('build_py')
+            data = []
+            for package in build_py.packages:
+                src_dir = build_py.get_package_dir(package)
+                data.extend(build_py.find_data_files(package, src_dir))
+            self.filelist.extend(data)
 
 info = eval(file('__tryton__.py').read())
 
@@ -12,12 +26,12 @@ setup(name='trytond-' + info['name'].lower(),
     author=info.get('author', ''),
     author_email=info.get('email', ''),
     url=info.get('website', ''),
-    package_dir={'trytond.modules.' + info['name']: ''},
+    package_dir={'trytond.modules.' + info['name'].lower(): '.'},
     packages=[
-        'trytond.modules.' + info['name'],
+        'trytond.modules.' + info['name'].lower(),
     ],
     package_data={
-        'trytond.modules.' + info['name']: [' ' + x for x in info.get('xml', [])],
+        'trytond.modules.' + info['name'].lower(): info.get('xml', []),
     },
     classifiers=[
         'Development Status :: 5 - Production/Stable',
@@ -32,4 +46,7 @@ setup(name='trytond-' + info['name'].lower(),
     ],
     license=info.get('license', 'GPL-2'),
     #requires=requires,
+    cmdclass={
+        'sdist': mysdist,
+    },
 )