Allow specific source to only be used in resolving dependency when source = "<source>" is specified

[chunleng]

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the FAQ and general documentation and believe that my question is not already covered.

Feature Request

As title, some sources are not meant to be lookup because they are used for specific purpose. For example, in pytorch-cpu, I get the following printed when running poetry lock --no-update.

Resolving dependencies... (881.4s)<c1>Source (pytorch-cpu):</c1> Authorization error accessing https://download.pytorch.org/whl/cpu/requests/

The above makes unnecessary requests and causes the dependency resolution to be slower than it needs to be.

If I may, I propose the following option for the source to be used only in the specified dependency

[[tool.poetry.source]]
name = "pytorch-cpu"
url = "https://download.pytorch.org/whl/cpu"
specified_only = true

[neersighted]

This is a duplicate of #6713. An issue being closed as a duplicate does not preclude it from being implemented, it only means that the linked issue is the place to discuss it. Please investigate the linked issue instead of continuing to open more issues. Thank you.

[chunleng]

This is a duplicate of #6713. An issue being closed as a duplicate does not preclude it from being implemented, it only means that the linked issue is the place to discuss it. Please investigate the linked issue instead of continuing to open more issues. Thank you.

Sorry, browser crashed and I didn't realize my previous request went through because of your fast reaction. Thank you for the quick response!

[github-actions]

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