URL links need to be reinstalled as versions cant be checked properly

[NickHilton]

• If a requirement is being installed from a URL we can't check the version properly so force reinstall

NOTES

• This affects packages installed via a requirements.txt file or setup.py - install_requires file
• Installing a package via pip install git+URL from the command line is not be affected as version is parsed correctly

BENEFITS

• Avoids the silent bug where a user expects a package to be installed with a specified version or branch

CONSIDERATIONS

• Will make installation slower if the URL version has NOT changed as it will reinstall anyway

ISSUE

• github URL version dependency not parsed appropriately from setup.py requirement #8197

[BrownTruck]

Hello!

I am an automated bot and I have noticed that this pull request is not currently able to be merged. If you are able to either merge the master branch into this pull request or rebase this pull request against master then it will be eligible for code review and hopefully merging!

[sbidoul]

The new resolver improves things in this area. I encourage you to give it a try. See #5780 (comment) and following comment for the current status and improvement suggestions.

[pradyunsg]

Closing since this is significantly out of date.