Show the detailed error when facing invalid requirements

[sbidoul]

Description

From #12691 (comment)

pip install --dry-run "python-hdf4>=0.10.0+dummy" prints ERROR: Invalid requirement: 'python-hdf4>=0.10.0+dummy'.

Expected behavior

The detailed, more informative error should be printed:

InvalidRequirement: Local version label can only be used with `==` or `!=` operators
    python-hdf4>=0.10.0+dummy
               ~~~~~~~~^

pip version

24.1b1

Python version

any

OS

any

How to Reproduce

pip install --dry-run "python-hdf4>=0.10.0+dummy"

Output

No response

Code of Conduct

• I agree to follow the PSF Code of Conduct.

[sbidoul]

@stonebig as for a solution, you'll need to update the requirement to not include the +dummy part.

[stonebig]

I did it. I had the precise error message with the position.
Just reported the "+" no more tolerated in case it was to consider a bug

[stonebig]

so me puting only the first line of the error miss-leaded you. you may close this one

[sbidoul]

@stonebig what command did you use precisely? Because when I tried, the pip install command above did not report the error details.

[stonebig]

... time to figure out I had temporarly fell back to pip-24.0. so with Pip-24.1b1, the method is

...WPy64-31300b1b\scripts>python -m pip install --pre  --no-index --trusted-host=None  --find-links=...\packages.srcreq -c ...\constraints.txt six

generating:

ERROR: Invalid requirement: 'python-hdf4>=0.10.0+dummy' (from line 437 of ...\constraints.txt)`

and no line below.
you are right: I allucinated the "detailed" error message, I don't see it either

[sbidoul]

Ok, thanks. I created #12715 to improve the error message.