[Distutils] Upcoming changes to PEP 426/440

Daniel Holth dholth at gmail.com
Fri Jul 5 02:09:23 CEST 2013

On the plus side if we're arguing about something as banal as this,
maybe we are almost done!

On Thu, Jul 4, 2013 at 3:38 PM, Vinay Sajip <vinay_sajip at yahoo.co.uk> wrote:
> Nick Coghlan <ncoghlan <at> gmail.com> writes:
>> The main benefit is that all the dependencies for an extra will typically
>> be in one place.
>> However, I briefly forgot the "machine readable" part again, and for that
>> TOOWTDI is to have one entry per dependency.
> One record per dependency is indeed the case at the RDBMS level, but there's
> no reason why that scheme needs to be slavishly copied over to the JSON. Let
> me try to illustrate this.
> I couldn't find any modelling code in Donald's public repo - I checked both
> branches and couldn't find it (Donald, please point me to it if it's on
> GitHub rather than just your local clone). So I knocked up a simple model
> (using SQLAlchemy, but the model is so simple that just about any ORM should
> do). The entities are Project, Release and Dependency. I've created a simple
> script, depmodel.py, along with two JSON files which have the relevant
> subset of the PEP 426 metadata for setuptools 0.7.7 and Pyramid 1.4.2. These
> are available at
> https://gist.github.com/vsajip/5929707
> This code/data uses the older schema (run_requires / run_may_require, etc.
> and using 'dependencies' rather than 'install' as a key). This is the JSON
> which is supposed to be problematic, so I wanted to see what the problems
> might be. I couldn't find any, so I'm linking to the code here so that
> Donald/Nick can point out any misunderstanding on my part.
> The script allows importing the dependencies from JSON to RDBMS (34 lines
> for the import function) and also exporting from RDBMS to JSON (43 lines for
> the export function). I've used SQLite for the database.
> python depmodel.py -i setuptools-0.7.7.json
> will read the dependencies into SQLite, and
> python depmodel.py -e setuptools/0.7.7
> will print the SQLite records as JSON.
> I understand that people might have particular preferences, but I can't see
> any technical reason why we couldn't have lists in the JSON. The import and
> export code looks pretty simple to me. What have I missed?
> Regards,
> Vinay Sajip
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