poetry update doesn't respect the change of "develop" attribute #4884

• 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: macOS Big Sur 11.6
• Poetry version: 1.1.12

Issue

When I change the develop attribute of a dependency (from false to true or vice versa) and run poetry update, the change is not respected - I get the following message:

No dependencies to install or update

Removing only poetry.lock also doesn't help - I have to uninstall the package. But I can't do it with poetry remove, because... there's no CLI flag for poetry add to specify the proper value of develop attribute when adding it back. I have to modify the file manually after that, but then package... is already installed, so we get stuck in the loop.

The solution is to run pip uninstall some_package, modify manually the pyproject.toml to change the develop value and then run poetry install.

[tool.poetry.dependencies]
python = "^3.8"
"some_package" = {path = "../some_package"}

⬇️

[tool.poetry.dependencies]
python = "^3.8"
"some_package" = {path = "../some_package", develop = true}

I see 2 issues here:

1. the one from the title
2. l̶a̶c̶k̶ ̶o̶f̶ ̶̶d̶e̶v̶e̶l̶o̶p̶̶ ̶o̶p̶t̶i̶o̶n̶ ̶f̶o̶r̶ ̶̶p̶o̶e̶t̶r̶y̶ ̶a̶d̶d̶̶ - seems to be resolved in 1.2.0