Activate `requires-plugins` from a project without using `poetry install`

[tungol]

Issue Kind

Change in current behaviour

Description

I have a use case where I currently copy the pypoetry.toml and poetry.lock files into a docker container and then run poetry export. In order to install the export plugin, I looked at using the tool.poetry.requires-plugins section, but it looks like that's only checked when the project is installed. It'd be nice if there was a way to ensure all required project plugins were installed without installing the project itself. That could either be a new command or maybe poetry self install could be changed to install project plugins as well.

Impact

This would improve the flexibilty of the tool.poetry.requires-plugins configuration option.

Workarounds

I worked around the issue by installing poetry-plugin-export explicitly in my dockerfile, but it'd be nice if there was a more generic way to accomplish this.

[Secrus]

Maybe poetry install --no-root is the answer to your issue? I don't think we can install plugins without installation.

[infinitewarp]

I think I have the same request. I have a project with a CI job that requires use of poetry-plugin-export to run poetry export, and I want that plugin/command to be available without installing all of the project's requirements. I basically want to tell poetry "please install the plugins declared in pyproject" and see only those plugins installed. So far, I have not found solution other than explicitly invoking poetry self add poetry-plugin-export, but I don't like this redundancy.

poetry install --no-root does not solve this problem; that still installs all the project's requirements.

[Secrus]

So, you would want something like poetry install --only-plugins?

[tungol]

Yeah, I think that's exactly what I'm looking for.