Proper way to tests with an alternative Python index?

[paugier]

I'd like to be able to test projects with an alternative Python index (https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/).

It seems to me that I would need a dedicated lock file and I see the --lockfile.

However, I didn't find how to lock with an alternative Python index just for one lock file. (Since I don't want to add https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/ for the main lockfile.)

[frostming]

By default, the lockfile is not bound to the index. This is to allow users the flexibility to choose their Python index during installation.
To switch Python index at installation time, you can do:

PDM_PYPI_URL=http://private-pypi.org/simple pdm install

Or, record index info into lockfile by:

pdm lock -S static_urls

[paugier]

Thanks. It makes sense. I think the missing part for what I'd like to do would be to be able to combine 2 sources (https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/ and standard PyPI). By using only scientific-python-nightly-wheels, I get during lock

[CandidateNotFound]: Unable to find candidates for fluiddyn. There may exist 
some issues with the package name or network condition.

I see https://pdm-project.org/latest/usage/config/#respect-the-order-of-the-sources but I want to keep using only https://pypi.org/simple/ for the main lockfile.

[frostming]

You can configure [[tool.pdm.source]] in that way and generate lockfile with -S static_urls, and you can then remove the source config afterwards. Sounds awkward but it works.