pyproject.toml option equivalent to "--no-root"

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

Feature Request

Can we add an option to the pyproject.toml or poetry.toml that defaults poetry to using the install --no-root behaviour by default, the fact I’m constantly having to run poetry install --no-root almost every time (I honestly cant recall a time I haven’t used this… so for me its close to always) rather than poetry install makes this feel like something I should be able to configure.

[kikyous]

please make --no-root default

[techdragon]

I’d argue this option actually belongs in both poetry.toml and pyproject.toml since a developer wanting to control their personal environment should use poetry.toml as this is their local config for their environments, however if a project were to for some reason require this option, then it makes sense for them to have this in the pyproject.toml that will be checked into git and shared with other developers.

One reason why a project might require this option is the popular testing tool Tox. Currently tox and poetry don’t play very well together, the current best practice recommends using --no-root in the tox configuration files. I wont reiterate the entire history of these other issues, but https://github.com/python-poetry/poetry/issues/1941 does a good job of summarising.

Another is Docker builds. https://github.com/python-poetry/poetry/issues/2760 and https://github.com/python-poetry/poetry/issues/1879 cover various issues in Docker environments where --no-root has come up as either the solution or a potential solution.

This is doubly problematic in the case of a web based project deployed using docker and tested with tox, where there is potentially (I’d argue this is quite likely) no scenario where the developers actually want to “install” the code they are writing and then the test setup will cause problems, in this situation there is no reason to ever install “the package” at all and forcing this as default behaviour only causes problems by constantly requiring users of poetry to use the --no-root option to avoid problems. I don’t come across many Flask or Django tutorials that even suggest a user define their code as an installable package at all so many web based projects are not written with installation as a package in mind. It was a Django package where I was testing using Tox that I had the most issues with poetry. Compounded with issues related to namespaced packages and having parts of the namespaced package in different pythonpath locations I got very frustrated with having to constantly use --no-root and opened this issue.

There are definitely legitimate uses for having a config file option for always doing the same thing as --no-root and it likely belongs in pyproject.toml but once theres an option for this I don’t see any reason why it shouldn’t also be a personal preference option on poetry.toml, but I’m less bothered by that not being available than I am at the lack of a project specific option for when this is necessary.