New warnings were found in our periodic (CRON) CI jobs.

Fixes https://travis-ci.org/heroku/heroku-buildpack-python/jobs/383404864

* metrics

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* using pipenv anyway

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* instrument bad failures

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* if not

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* Add support for PIP_EXTRA_INDEX_URL

* Add support for PIP_EXTRA_INDEX_URL for Pipenv

* initial stab at pipenv --dev support

* test installation output

* locale fix

* refactor

* fix typo

* fix typo

* ellipsis

* polish

* mcount pipenv

* more mcount for pip

* shellcheck compliance

* fix typo

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* fixed the bug for pypy-5.8.0

* update changelog

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* blacklist for old apps

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* only blacklist pythonhome/path

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* updated changelog

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* be more agressive with blacklisting

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* sub_env was a terrible idea

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* changelog update

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* fixed the bug for pypy-5.8.0

* update changelog

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* blacklist for old apps

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* only blacklist pythonhome/path

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* updated changelog

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* fixed the bug for pypy-5.8.0

* changelog entry

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* use std-lib sub-env

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* let's see if this cleans things up

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* try v7 of stdlib

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* use new sub_env

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* set_env

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* set_default_env

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* v8 of stdlib

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* v112

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* oops (merge bug)

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* final merge error resolve

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* final final fix for merge conflict

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* Allow environment variables during pip install, fixes #416

* shift sub-env command, fix typo

* bash check thingy fixed

* fixed the bug for pypy-5.8.0

* enable shellcheck in makefile

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* make compile script shellcheck compatible

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* let's see what this says

* fix pip installation

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck detect script

* shellcheck release

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck test-compile

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck warnings/utils

* updated makefile

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck collectstatic

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck cryptography

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck eggpath fixes

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck gdal

* shellcheck goes-libs

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck mercurial

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* nltk shellcheck

* shellcheck pip-install

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck pip-uninstall

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck pipenv

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck pylibmc

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* shellcheck python

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* update makefile

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* final update to makefile

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* fix tests

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* actually fix the tests

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* update pipenv-python-version

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* requested fixes

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* update spellcheck sources

* attempted fix for shell globbing

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* further attempted fix

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* switch nltk styling

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* no more need for temp app for installing pip

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* attempt at staged build for shellcheck

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* attempted fix of travis file

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* reorder travis file

* add shellcheck to install

* make things clearer in travis file

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* better travis file

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* attempt at better travis file

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* better travis file

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* skip pip install for pipenv

* better

* improvements

* indent

* chmod +x

* export

* skip uninstall too

* pip freeze

* Revert "skip uninstall too"

This reverts commit faac96f62004f78c3d27a92cd865954fc7a3a53d.

* better comments

* redirect stderr to stdout

commit cb2c57dcffe856ad547ad8fbd1907815713dc4a7
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:44:39 2017 -0500

    no files were found

commit 38f861f6c6dbb2825c6551f220e610bea619c27f
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:37:35 2017 -0500

    uninstall

commit db1db5d2a0ad364d646d378ccff62b9aa0257efd
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:36:41 2017 -0500

    pip cleanup

commit 2e16f233849f683ad9c9d00bad51c2dd5da11c18
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:35:13 2017 -0500

    uninstall

commit 078e43d2926b77a40f21026969ee930aa7ad0fee
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:31:39 2017 -0500

    fix

commit eff318eaf37161f0c496e130688b27d596b9cd7a
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:30:09 2017 -0500

    wfwef

commit d8955b452190b1b6a40049c94df564144c4607dc
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:28:30 2017 -0500

    oops

commit 0e83a0ae238bdea06ce0d184c8139b598f71745e
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:24:28 2017 -0500

    find

commit b9cb901ecb9d9075020f5c63e5faee04aade1ad7
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:23:04 2017 -0500

    don't

commit 3fd1a448e244a7c3f877ae75cd8672ef42a3f550
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:22:29 2017 -0500

    output

commit 884c6a40ee14365fccd4c9a34fb7733a833303a4
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:17:47 2017 -0500

    delete egg links

commit 9a16a8676abbd34b9ae0de3de4d52b4d358b2e35
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 11:14:18 2017 -0500

    remove egg-links

commit d45d9e977adc8ad7c5c18a27f1dfb20eb286bb5d
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 10:35:24 2017 -0500

    no echo

commit 5cfb64387db1c69fff57ac9afa0c996a34a4362d
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 10:33:58 2017 -0500

    debug

commit ac143097e9ee0a23464d16e2c6d414437046132e
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 10:26:27 2017 -0500

    no print 0

commit 72adfe2e4abd975f5df5350f06f93d1309ff4ed1
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 10:25:27 2017 -0500

    cat other one

commit e51e83ca3ec9a6710add90424f80f9bc7c3d5bf3
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 10:23:52 2017 -0500

    echo

commit def0231dd068fe4a854074bf42409ef373ac0977
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Jan 2 10:20:31 2017 -0500

    cat the files

commit 554a8bba
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 16:26:18 2016 -0500

    comment out debugging line

commit 6572ad3d
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 16:21:03 2016 -0500

    test

commit 35cabaee
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 16:09:21 2016 -0500

    try .

commit 300285a9
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 16:05:22 2016 -0500

    find

commit 7a6f1eb0
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 16:02:24 2016 -0500

    find

commit 66d75497
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 15:55:04 2016 -0500

    fix xargs

commit 9c222a93
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 15:53:04 2016 -0500

    copy src

commit 7f4273f4
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 15:45:20 2016 -0500

    new replace script

commit dd707c21
Author: Kenneth Reitz <me@kennethreitz.org>
Date:   Mon Dec 19 15:40:35 2016 -0500

    re-write egg-links