add possibility to set the pyproject TOML from a custom path when running a command

[DavidVujic]

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• I have searched the FAQ and general documentation and believe that my question is not already covered.

Feature Request

I think it would be a nice idea to make it possible for a Poetry command (the built-ins or from a plugin) to pass in the path to the actual pyproject.toml file.

Something like:

poetry build --path my_project/in/a/subfolder/pyproject.toml

This would be useful for scenarios when you have more than one project in a repository. With such a feature, you could run build commands from the repo top folder, instead of navigating down the directory structure.

I see two steps here:

1. make it possible to set the pyproject property of the poetry instance. A command could then do:

self.poetry.pyproject = PyProjectTOML(custom_path)

2. add a command option. The closest at hand would probably be the build command.

[neersighted]

Addressed by #6810 already as best I can tell.

[DavidVujic]

Addressed by #6810 already as best I can tell.

Great! ⭐

[damascene]

So we can now use:

poetry build --directory my_project/in/a/subfolder/

or:

poetry build -C my_project/in/a/subfolder/

considering that pyproject.toml location is:

my_project/in/a/subfolder/pyproject.toml

?

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