Show warning for invalid packages

[davidhesselbomvcc]

Given the requirements file req.txt, with the following contents:

non-existent-package

The command

pip install -r req.txt produces the following output:

ERROR: Could not find a version that satisfies the requirement non-existent-package (from -r req.txt (line 1)) (from versions: none)
ERROR: No matching distribution found for non-existent-package (from -r req.txt (line 1))

However, pur -f -r req.txt (version 0.5.4) just says All requirements up-to-date. and exits with code 0. I'd say this is a bug?

[davidhesselbomvcc]

@alanhamlett Does the new title you set for this issue mean that you intend to keep exiting with code 0 when this happens, even when a warning is issued?

[alanhamlett]

Yes, we can add a new flag to exit non-zero but by default I don't want to start exiting with an error when it wasn't doing that previously.

[davidhesselbomvcc]

Yes, we can add a new flag to exit non-zero but by default I don't want to start exiting with an error when it wasn't doing that previously.

Fair enough

[alanhamlett]

Implemented with e11bae6 and released in v7.2.0.