[>=1.2] dev group ignored when deprecated tool.poetry.dev-dependencies is present in pyproject.toml

[zEdS15B3GCwq]

• I am on the latest Poetry version.

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

• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Win 11 21H2

• Poetry version: 1.2.0b1 (latest as of 2022 Apr 7)

Issue

I have a project that was created with Poetry 1.1.*, and when I upgraded Poetry to the latest dev version (1.2.0b1), the dev dependencies of the project (added in 1.1) stopped installing on poetry install. I've found that the deprecated section [tool.poetry.dev-dependencies] was still in pyproject.toml, and when it was present, poetry would not recognise the dev packages in [tool.poetry.group.dev.dependencies].

Furthermore, I had some cases in which dev dependencies were removed from the project on a poetry upgrade and in other situations, but those cases I did not explore further so I'm just mentioning them to indicate that there may be further issues.

minimal example:

[tool.poetry]
name = "bb"
version = "0.1.0"
description = ""
authors = ["Your Name <you@example.com>"]
readme = "README.md"

[tool.poetry.dependencies]
python = "^3.10"
decorator = "^5.1.1"

[tool.poetry.group.dev.dependencies]
dill = "^0.3.4"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry-core"]
build-backend = "poetry.core.masonry.api"

Executing poetry install or even poetry install --with=dev only installs decorator.

If the section [tool.poetry.dev-dependencies] is renamed or removed, poetry will behave correctly.

I'm unsure in which situations the empty [tool.poetry.dev-dependencies] section can remain or appear in the project.toml file.

[abn]

This should be resolved with python-poetry/poetry-core#305.

Next poetry release with the next core release should fix this.

[zEdS15B3GCwq]

@abn , that's good to hear. Is there any chance for a fix for current 1.2?

[abn]

You could manually update poetry-core to git@master in poetry's own virtual environment.

The next 1.2 release will have this fix.

[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.