[tahoe-lafs-trac-stream] [Tahoe-LAFS] #717: unnecessary rebuild of dependencies when tahoe-deps/ is present

[Tahoe-LAFS]

#717: unnecessary rebuild of dependencies when tahoe-deps/ is present
---------------------------+--------------------------------
     Reporter:  warner     |      Owner:  cgalvan
         Type:  defect     |     Status:  closed
     Priority:  major      |  Milestone:  1.11.0
    Component:  packaging  |    Version:  1.4.1
   Resolution:  fixed      |   Keywords:  setuptools install
Launchpad Bug:             |
---------------------------+--------------------------------
Changes (by warner):

 * status:  new => closed
 * resolution:   => fixed
 * milestone:  undecided => 1.11.0


Old description:

> Using a trunk [changeset:9a02f4a1043d6288] tree, on my debian/sid box,
> performing "python setup.py build" with the tahoe-deps tarball unpacked
> in the parent directory causes several dependency libraries to be built
> and installed in support/lib/python2.5/site-packages even though those
> libraries are already present, usable, and visible to
> {{{pkg_resources.requires}}} in the standard PYTHONPATH
> /usr/lib/python2.5/site-packages directory.
>
> The libraries that are unnecessarily rebuilt are:
>
>  * foolscap-0.4.1
>  * twisted-8.2.0
>  * simplejson-2.0.9
>
> Removing ../tahoe-deps, erasing support/lib, and re-running "python
> setup.py build" correctly skips the build of these libraries, resulting
> in a support/lib that only contains setuptools-0.6c12dev and the
> allmydata-tahoe.egg-link file (well, and the usual setuptools noise:
> setup.py, setuptools.pth, and easy-install.pth).
>
> Something in setuptools is buggy: having ../tahoe-deps available should
> not influence the decision to install a library or not.
>
> This needs to be added to the setuptools bugtracker at
> http://bugs.python.org/setuptools/ .

New description:

 Using a trunk [changeset:9a02f4a1043d6288] tree, on my debian/sid box,
 performing "python setup.py build" with the tahoe-deps tarball unpacked in
 the parent directory causes several dependency libraries to be built and
 installed in support/lib/python2.5/site-packages even though those
 libraries are already present, usable, and visible to
 {{{pkg_resources.requires}}} in the standard PYTHONPATH /usr/lib/python2.5
 /site-packages directory.

 The libraries that are unnecessarily rebuilt are:

  * foolscap-0.4.1
  * twisted-8.2.0
  * simplejson-2.0.9

 Removing ../tahoe-deps, erasing support/lib, and re-running "python
 setup.py build" correctly skips the build of these libraries, resulting in
 a support/lib that only contains setuptools-0.6c12dev and the allmydata-
 tahoe.egg-link file (well, and the usual setuptools noise: setup.py,
 setuptools.pth, and easy-install.pth).

 Something in setuptools is buggy: having ../tahoe-deps available should
 not influence the decision to install a library or not.

 This needs to be added to the setuptools bugtracker at
 http://bugs.python.org/setuptools/ .

--

Comment:

 We no longer provide or support the `tahoe-deps` tarball/directory, and
 the pip http+wheel cache works correctly to avoid rebuilds. Closing this
 out.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/717#comment:13>
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