[Distutils] "buildout-versions" not showing pinned versions

[B.Nanda Kishore]

Well that was something new for me. Having two versions of the same package
in
the same buildout file.

Actually I was installing a few distributions in my workplace. So some
distros have
version pinned in their setup.py install_requires section, and when I run
the buildout
expecting the versions to be printed, its not printing those alone. So
mentioning the version
was not in the buildout file originally, but I see your point of putting
them in [versions] section.
But tell me this. In the above example(pinning a version number in
install_requires section of setup.py)
expecting the version of the package to be printed is a valid usecase right
? Is it not ? I know from the
example which you gave previously there seems to be some ambiguity from
which version to pick if
there are multiple versions. right ? Thats why its left out or ?

Regards,
Nandakishore


On Wed, Aug 17, 2011 at 7:44 AM, Chris Withers <chris at simplistix.co.uk>wrote:

> On 16/08/2011 18:31, B.Nanda Kishore wrote:
>
>> [buildout]
>> index=http://localhost:8000/
>> parts = deps
>> extensions = buildout-versions
>>
>> [deps]
>> recipe = zc.recipe.egg
>> eggs = PkgA
>>             PkgB==0.1.0
>>
>> When I ran the buildout, this is the output I got.
>>
>> [versions]
>> PkgA = 0.1.0
>> buildout-versions = 1.6
>> distribute = 0.6.19
>> zc.buildout = 1.5.2
>> zc.recipe.egg = 1.3.2
>>
>> Notice that PkgB's version is not printed.
>>
>
> Yes, as I said before, this is intended and will not change.
>
> Here's an example buildout.cfg that shows why:
>
> [buildout]
> parts = part1 part2
>
> extensions = buildout-versions
> versions = versions
>
> [versions]
> SomePackage = 2.0
>
> [part1]
>
> recipe = zc.recipe.egg
> eggs =
>  SomePackage
>
> [part2]
>
> recipe = zc.recipe.egg
> eggs =
>  SomeOtherPackage
>  SomePackage==1.0
>
> To explain, SomeOtherPackage has a dependency on SomePackage, but hasn't
> been updated to work with version 2.0, so needs to be pinned to 1.0.
> However, the rest of the buildout is fine to use with the new version 2.0.
>
> In general, buildout-versions should be used as described in its docs and
> versions should *only* be pinned in a [versions] section.
>
> *Why* are you pinning in the eggs line?
>
>
> cheers,
>
> Chris
>
> --
> Simplistix - Content Management, Batch Processing & Python Consulting
>            - http://www.simplistix.co.uk
>
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