On Mon, Apr 7, 2014 at 4:03 PM, Daniel Holth <dholth@gmail.com> wrote:

OK, it does in fact work that way; empty-string-before-colon specifies
a default requirement with a marker.

Parses out to the following _dep_map with 'None' representing 'not an
extra dependency':

{None: [Requirement.parse('coding'), Requirement.parse('stuff')],
'quux': [Requirement.parse('more-stuff')]}

requirements.txt:

coding

[:sys_platform=='linux2']
stuff

[quux:sys_platform=='linux2']
more_stuff

Huh. Either I did that intentionally and forgot about it, or it just fell out as a brilliant accidental side effect of the orthogonal design of the parsing functions. Either way, I feel like I did something smart there. ;-)