Environment

• Python 3.8.10
• Poetry 1.2.0b1

Version 1

[tool.poetry]
name = "poetry-optional-no-extra"
version = "0.1.0"
description = ""
authors = ["charbonnierg <guillaume.charbonnier@araymond.com>"]
readme = "README.md"
packages = [{include = "pkg", from="src"}]

[tool.poetry.dependencies]
python = "^3.8"
click = {version = "^8.1.2", optional = true}


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

Associated wheel metadata:

Metadata-Version: 2.1
Name: poetry-optional-no-extra
Version: 0.1.0
Summary: 
Author: charbonnierg
Author-email: guillaume.charbonnier@araymond.com
Requires-Python: >=3.8,<4.0
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Requires-Dist: click (>=8.1.2,<9.0.0)
Description-Content-Type: text/markdown

Installation:

$ pip install ./dist/poetry_optional_no_extra-0.1.0-py3-none-any.whl

Processing ~/github/charbonnierg/poetry-optional-no-extra/dist/poetry_optional_no_extra-0.1.0-py3-none-any.whl
Collecting click<9.0.0,>=8.1.2
  Using cached click-8.1.2-py3-none-any.whl (96 kB)
Installing collected packages: click, poetry-optional-no-extra
Successfully installed click-8.1.2 poetry-optional-no-extra-0.1.0

🧨 click is installed

Version 2

Dependency is no longer optional.

[tool.poetry]
name = "poetry-optional-no-extra"
version = "0.2.0"
description = ""
authors = ["charbonnierg <guillaume.charbonnier@araymond.com>"]
readme = "README.md"
packages = [{include = "pkg", from="src"}]

[tool.poetry.dependencies]
python = "^3.8"
click = "^8.1.2"


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

Associated wheel metadata:

Metadata-Version: 2.1
Name: poetry-optional-no-extra
Version: 0.2.0
Summary: 
Author: charbonnierg
Author-email: guillaume.charbonnier@araymond.com
Requires-Python: >=3.8,<4.0
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Requires-Dist: click (>=8.1.2,<9.0.0)
Description-Content-Type: text/markdown

Installation:

$ pip install ../dist/poetry_optional_no_extra-0.2.0-py3-none-any.whl

Processing ~/github/charbonnierg/poetry-optional-no-extra/dist/poetry_optional_no_extra-0.2.0-py3-none-any.whl
Collecting click<9.0.0,>=8.1.2
  Using cached click-8.1.2-py3-none-any.whl (96 kB)
Installing collected packages: click, poetry-optional-no-extra
Successfully installed click-8.1.2 poetry-optional-no-extra-0.2.0

🧨 click is installed

Version 3

Dependency is optional and used as extra:

[tool.poetry]
name = "poetry-optional-no-extra"
version = "0.3.0"
description = ""
authors = ["charbonnierg <guillaume.charbonnier@araymond.com>"]
readme = "README.md"
packages = [{include = "pkg", from="src"}]

[tool.poetry.dependencies]
python = "^3.8"
click = { version = "^8.1.2", optional = true }

[tool.poetry.extras]
cli = ["click"]


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

Associated wheel metadata:

Metadata-Version: 2.1
Name: poetry-optional-no-extra
Version: 0.3.0
Summary:
Author: charbonnierg
Author-email: guillaume.charbonnier@araymond.com
Requires-Python: >=3.8,<4.0
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Provides-Extra: cli
Requires-Dist: click (>=8.1.2,<9.0.0); extra == "cli"
Description-Content-Type: text/markdown

Installation:

$ pip install ../dist/poetry_optional_no_extra-0.3.0-py3-none-any.whl

Processing ~/github/charbonnierg/poetry-optional-no-extra/dist/poetry_optional_no_extra-0.3.0-py3-none-any.whl
Installing collected packages: poetry-optional-no-extra
Successfully installed poetry-optional-no-extra-0.3.0

🎉 click is not installed