Cannot request optional extras when installing from local repo (unless editable is used)

[morty]

This works:

pip install messytables[pdf]

So does this when in a checkout of the messytables source:

pip install --editable ".[pdf]"

But this does not work:

pip install ".[pdf]"

[coderanger]

Workaround is to give a full URI like file:///home/you/src/foo#egg=foo[bar,baz],

[tomprince]

#2000 is a duplicate of this.

[cjerdonek]

I hit this today, too.

[letmaik]

Quite annoying. In travis I wanted to do this:

  - python setup.py sdist
  - pip install dist/*.tar.gz[cdf,netcdf]

But it failed with:

  File "/home/travis/miniconda/envs/test/lib/python2.7/site-packages/pip/_vendor/pkg_resources.py", line 2573, in scan_list
    raise ValueError("Expected "+item_name+" in",line,"at",line[p:])
ValueError: ('Expected version spec in', 'dist/*.tar.gz[cdf,netcdf]', 'at', '/*.tar.gz[cdf,netcdf]')

[rbu]

Got bitten by this today. For completeness, this is the error you get:

$ pip install .[testing]
Collecting .[testing]

  Could not find any downloads that satisfy the requirement .[testing]
  No distributions at all found for .[testing]

ref https://travis-ci.org/rbu/pyramid_scheme/jobs/54135606

[dstufft]

Fixed in #2785