On 27 February 2014 18:16, Vinay Sajip
but my question was what are you adding, if anything, that warranted it having "Metadata-Version: 2.0"?
I believe that the fields 'Private-Version', 'Obsoleted-By', 'Setup-Requires-Dist', 'Extension' and 'Provides-Extra' were added on top of the 1.2 metadata in an early version of PEP 426, before the move to JSON.
For the record, http://hg.python.org/peps/file/3b67372b39ba/pep-0426.txt is the last version prior to the switch to JSON, and the summary of differences is at http://hg.python.org/peps/file/3b67372b39ba/pep-0426.txt#l1263 At that time, I think wheel still had a dependency on PEP 426 - changing wheels to work with the setuptools metadata was a relatively late change after we realised it made sense to decouple the two activities. Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia