Merge branch 'conda' into 'master'

Handle changes in the output of conda render

Closes #56

See merge request bob/bob.conda!370

scripts/check_exists.py

@@ -44,7 +44,10 @@ def get_rendered_recipe(build_config, path):
   cmd = [conda, 'render', '--variant-config-files', build_config, path]
   print('$ %s' % ' '.join(cmd))
 
-  output = subprocess.check_output(cmd)
+  from conda_build.api import get_or_merge_config, render, output_yaml
+  config = get_or_merge_config(None, variant_config_files=build_config)
+  metadata = render(path, config=config)
+  output = output_yaml(metadata[0][0])
   return yaml.load(output)