fix regression of #228

Author: dirk-thomas

scripts/doc/build_doc.py

@@ -93,7 +93,7 @@ def main(argv=sys.argv[1:]):
             # generated by cmi won't implicitly source the underlays
             setup_file = '/opt/ros/%s/setup.sh' % args.rosdistro_name
             if os.path.exists(setup_file):
-                source_cmd = ['.', setup_file] + source_cmd
+                source_cmd = ['.', setup_file, '&&'] + source_cmd
             rosdoc_lite_cmd = [
                 os.path.join(args.rosdoc_lite_dir, 'scripts', 'rosdoc_lite'),
                 pkg_path,