[Distutils] PEP425 - Wheel Binary Package Compatibility

[Daniel Holth]

I've always thought people might like to have a custom platform tag or
otherwise customize the supported list in a configuration file loaded
by pep425tags. Then you could create wheels called
somewheel-4.0-py33-none-30caa8a209d6.whl (choose your own random
string). Only a pip with a matching config would pay any attention to
those wheels. That way we could help people manage their internal
deployments without falsely advertising that we've solved the binary
incompatibility feature baked into every Linux distribution.

On Wed, Oct 29, 2014 at 3:52 PM, Donald Stufft <donald at stufft.io> wrote:
>
> On Oct 29, 2014, at 2:36 PM, Marcus Smith <qwcode at gmail.com> wrote:
>
>
>> This is the kind of direction we're also exploring for Fedora & EPEL:
>> setting up a distro specific devpi instance so we can automatically publish
>> distro compatible wheel files, as well as separating the distro level
>> licencing and preliminary security review step from the step of repackaging
>> in a language independent format. (I need to set up a curated PyPI mirror
>> for work anyway, and since I work at Red Hat, and the Fedora community are
>> open to the idea, we're working on it upstream rather than inside the
>> firewall)
>
>
> Btw, I've been doing this at my company, that is maintaining separate wheel
> indexes per platform we need (in our case, cent5 and cent6).
> One problem here is that it's possible for pip download caches to get
> "corrupted" with the wrong distributions (i.e. the incompatible ones), since
> the distributions are not distinguishable by name
> Would Fedora really consider releasing a public service where there fedora
> release is not represented in the distribution name? or would you be wanting
> to get more tagging spec'd out in Wheel 2.0 first?
>
> P.S.  In looking at the PEP425/427 specs again, I'm slightly confused about
> the "build tag".  It's barely covered, but I can imagine using that possibly
> to distinguish dists, assuming pip support was added, alhough it's supposed
> to start with a number, which doesn't seem to fit the use case we'd want.
>
>
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>
> It’s a build number, it’s used incase you need to rebuild a Wheel using the
> same source files.
>
> ---
> Donald Stufft
> PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
>
>
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