Changing PEP 508 URLs in setup.py doesn't reinstall the dependency

[rouge8]

Environment

• pip version: 19.0
• Python version: 3.7.2
• OS: macOS 10.14.2

Description

Changing a PEP 508 URL in setup.py doesn't reinstall the dependency, so can't use them to set a particular version. See example in How to Reproduce.

This seems related to #5898 and #5780 (maybe a duplicate? feel free to close if so).

Expected behavior

Changing the URL (especially the tag for VCS URLs) will install the correct version of the dependency.

How to Reproduce

1. Create a minimal setup.py:

from setuptools import setup

setup(
    name="test-package",
    version="1.0.0",
    install_requires=[
        "pip-test-package @ https://github.com/pypa/pip-test-package/archive/0.1.1.zip"
    ],
)

2. Run pip install -e .
3. Update the dependency to pip-test-package @ https://github.com/pypa/pip-test-package/archive/0.1.2.zip
4. Run pip install -e .
5. The new version was not installed, which you can verify with pip freeze

Output

$ pip install -e .
Obtaining file:///Users/andy/tmp/pip-bug
Collecting pip-test-package@ https://github.com/pypa/pip-test-package/archive/0.1.1.zip from https://github.com/pypa/pip-test-package/archive/0.1.1.zip (from test-package==1.0.0)
  Downloading https://github.com/pypa/pip-test-package/archive/0.1.1.zip
     \ 61kB 36.2MB/s
Building wheels for collected packages: pip-test-package
  Building wheel for pip-test-package (setup.py) ... done
  Stored in directory: /private/var/folders/bw/ghklm2fs6bx_x9x_f0wg5kph0000gn/T/pip-ephem-wheel-cache-2n8m21u0/wheels/bc/f7/bf/ce391e96fea98b7815496177b5435404304409f0a3f10e9ca2
Successfully built pip-test-package
Installing collected packages: pip-test-package, test-package
  Running setup.py develop for test-package
Successfully installed pip-test-package-0.1.1 test-package
$ pip freeze
pip-test-package==0.1.1
# Editable install with no version control (test-package==1.0.0)
-e /Users/andy/tmp/pip-bug
andy at andy-goodrx in ~/tmp/pip-bug exited 1 workon tmp-bbfca53269d4978c
$ sed -i '' 's/0.1.1/0.1.2/g' setup.py
$ cat setup.py
from setuptools import setup

setup(
    name="test-package",
    version="1.0.0",
    install_requires=[
        "pip-test-package @ https://github.com/pypa/pip-test-package/archive/0.1.2.zip"
    ],
)
$ pip install -e .
Obtaining file:///Users/andy/tmp/pip-bug
Requirement already satisfied: pip-test-package@ https://github.com/pypa/pip-test-package/archive/0.1.2.zip from https://github.com/pypa/pip-test-package/archive/0.1.2.zip in /Users/andy/.virtualenvs/tmp-bbfca53269d4978c/lib/python3.7/site-packages (from test-package==1.0.0) (0.1.1)
Installing collected packages: test-package
  Found existing installation: test-package 1.0.0
    Uninstalling test-package-1.0.0:
      Successfully uninstalled test-package-1.0.0
  Running setup.py develop for test-package
Successfully installed test-package
$ pip freeze
pip-test-package==0.1.1
# Editable install with no version control (test-package==1.0.0)
-e /Users/andy/tmp/pip-bug

[pradyunsg]

I'll go ahead and close this, as a duplicate of #5780.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.