`freeze` (accidentally) outputs "Created temporary directory"

[Alexander-Shukaev]

Environment

• pip version: 18.1
• Python version: 3.7.1
• OS: Linux

Description

The

Created temporary directory: /tmp/pip-ephem-wheel-cache-iuw65_l9

seems to not belong to the output of the following freeze command at all:

(.venv) python -m pip --verbose freeze 2> '/dev/null' | grep -v -e '^-e'  | LC_COLLATE='C' sort
Bottleneck==1.2.1
Created temporary directory: /tmp/pip-ephem-wheel-cache-iuw65_l9
PyQt5-sip==4.19.13
PyQt5==5.11.3
atomicwrites==1.2.1
attrs==18.2.0
blist==1.3.6
certifi==2018.8.24
chardet==3.0.4
cycler==0.10.0
docopt==0.6.2
idna==2.7
kiwisolver==1.0.1
matplotlib==2.2.3
more-itertools==4.3.0
mpl-finance==0.10.0
numpy==1.15.4
pipreqs==0.4.9
pluggy==0.7.1
py==1.6.0
pyparsing==2.2.0
pytest-runner==4.2
pytest-timeout==1.3.2
pytest==3.8.0
python-dateutil==2.7.5
pytz==2018.7
requests==2.19.1
scipy==1.1.0
setuptools-scm==3.1.0
six==1.11.0
urllib3==1.23
yarg==0.1.9
(.venv) python --version
Python 3.7.1
(.venv) pip --version
pip 18.1 from .venv/lib/python3.7/site-packages/pip (python 3.7)

It spoils output in a way that I now have to create an additional filter with e.g. grep because if saved as a requirements file, pip itself will not be able to consume it.

Expected behavior

Same as without --verbose:

(.venv) python -m pip freeze 2> '/dev/null' | grep -v -e '^-e'  | LC_COLLATE='C' sort
Bottleneck==1.2.1
PyQt5-sip==4.19.13
PyQt5==5.11.3
atomicwrites==1.2.1
attrs==18.2.0
blist==1.3.6
certifi==2018.8.24
chardet==3.0.4
cycler==0.10.0
docopt==0.6.2
idna==2.7
kiwisolver==1.0.1
matplotlib==2.2.3
more-itertools==4.3.0
mpl-finance==0.10.0
numpy==1.15.4
pipreqs==0.4.9
pluggy==0.7.1
py==1.6.0
pyparsing==2.2.0
pytest-runner==4.2
pytest-timeout==1.3.2
pytest==3.8.0
python-dateutil==2.7.5
pytz==2018.7
requests==2.19.1
scipy==1.1.0
setuptools-scm==3.1.0
six==1.11.0
urllib3==1.23
yarg==0.1.9

[chrahunt]

I can confirm this impacts 19.1.1.

[chrahunt]

Bisect with

#!/bin/sh
if pip --verbose freeze 2>/dev/null | grep 'Created temporary'; then
    exit 1
fi

shows this was introduced in e7b7239 (#5541), so 18.0 to the present.

[chrahunt]

If #6759 is merged then we can close this.

If we do not want to take the "shortcut", then we can close this in favor of handling it generally with #6758.

[pradyunsg]

Closing in favour of #6758.