On Jul 4, 2013, at 7:00 AM, Nick Coghlan <ncogh...@gmail.com> wrote:
> > On 4 Jul 2013 18:52, "Vinay Sajip" <vinay_sa...@yahoo.co.uk> wrote: > > > > Nick Coghlan <ncoghlan <at> gmail.com> writes: > > > > > * "install": the installation specifier for the dependency > > > * "extra": as per the current PEP (for conditional dependencies) > > > * "environment": as per the current PEP (for conditional dependencies) > > > > > > 4. The "install" subfield is compulsory, the other two are optional > > > (as now, using either of the latter creates a "conditional > > > dependency", while dependency declarations with only the "install" > > > subfield are unconditional) > > > > > > 5. An installation specifier is what PEP 426 currently calls a > > > dependency specifier: the "name [extras] (constraints)" format. They > > > will get their own top level section (similar to the existing Extras > > > and Environment markers sections) > > > > Is there a particular benefit of the install subfield being a single > > installation specifier, as opposed to a list of such specifiers? It's > > perhaps neither here nor there for machine-processed metadata, but I expect > > this metadata would have human readers too. Not using a list would lead to > > more verbose metadata. > > Hmm, I guess as long as it's consistent, the only difference when processing > is list.append vs list.extend. > > There's a little extra work when serialising to group like entries together, > but I'm OK with that (and that would be a SHOULD rather than a MUST anyway). > > If I don't hear a good argument against it, I'll make that field a list. > > > > > Regards, > > > > Vinay Sajip > > > > _______________________________________________ > > Distutils-SIG maillist - Distutils-SIG@python.org > > http://mail.python.org/mailman/listinfo/distutils-sig > _______________________________________________ > Distutils-SIG maillist - Distutils-SIG@python.org > http://mail.python.org/mailman/listinfo/distutils-sig I would prefer a single entry. It makes the serialization format map to the modeling simpler, and I think it's simpler for humans too. I don't see much benefit to making it a list except arbitrarily adding another level of nesting. ----------------- Donald Stufft PGP: 0x6E3CBCE93372DCFA // 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
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