Black version number is not properly set when downloading from source and installing from PyPi.

[dciborow]

Describe the bug
I am trying to install black locally after downloading from pypi, but the version is set to 0.0.0.

To Reproduce Steps to reproduce the behavior:

1. In "core.in" place one line "black==20.8b1"
2. pip-compile --allow-unsafe --generate-hashes --output-file=./core-linux.txt ./core.in
   1.```
   pip download
   --no-build-isolation
   --require-hashes
   --no-binary :all:
   --only-binary ${BINARY}
   -d "/source/packages/pywheel"
   -r "/tmp/requirements/core-linux.txt"

1. ```
pip install \
        --no-build-isolation \
        --no-index \
        --find-links "/source/packages/pywheel" \
        --require-hashes \
        --no-deps \
        --no-binary :all: \
        --only-binary ${BINARY} \
        --upgrade \
        -r "/tmp/requirements/core-linux.txt"

Processing /source/packages/pywheel/black-20.8b1.tar.gz
Preparing wheel metadata: started
Preparing wheel metadata: finished with status 'done'
WARNING: Requested black==20.8b1 from file:///source/packages/pywheel/black-20.8b1.tar.gz (from -r /tmp/requirements/test-linux.txt (line 35)), but installing version 0.0.0
ERROR: Requested black==20.8b1 from file:///source/packages/pywheel/black-20.8b1.tar.gz (from -r /tmp/requirements/test-linux.txt (line 35)) has different version in metadata: '0.0.0'

Expected behavior A clear and concise description of what you expected to happen.
Install correctly.

Environment (please complete the following information):

• Version: [e.g. master] 20.8b1
• OS and Python version: [e.g. Linux/Python 3.7.4rc1]
  Linux - Python 3.7

[ichard26]

I'm not sure what you're trying to do, but try making sure setuptools-scm is available in the environment you're installing to.

[dciborow]

This is a duplicate of this issue. I found it after posting this.
#1847

[ichard26]

Closing since releases since 20.8b1 have wheels which completely sidestep the version being 0.0.0. And even if you're using a sdist (like in this issue), there's nothing on Black's side we can do to fix this (well other than stopping to use setuptools-scm to version our releases which we are definitely not doing).

As mentioned before, make sure you have a recent install of setuptools and setuptools-scm (wheel may be helpful too although I'm not enough of a packaging expert to know) available in your target environment (especially if you disable build isolation).

Also, embedded Pythons aren't supported by Pip and we won't officially support installation where the tooling doesn't support it itself.