Poetry 0.10.0 is out

This version brings a brand new dependency resolver which is more consistent, reliable and faster.

New Features #

Brand new dependency resolver #

The dependency resolver has been rewritten from scratch to make it more resilient and reliable.

It solves conflicts in a faster and smarter way to be as exhaustive as possible.

It also comes with much clearer error messages when no valid solution can be found. Here are some examples:

[SolverProblemError]
Because demo depends on django (2.0.1) which requires Python >=3.4,
version solving failed.

[SolverProblemError]
Because masonite (1.6.7) depends on both cryptography (2.1.4) and cryptography (2.2.2),
 masonite is forbidden.
So, because demo depends on masonite (1.6.7), version solving failed.

New init command #

The init command has been added.

It helps you create a pyproject.toml file interactively by prompting you to provide basic information about your package.

poetry init

New develop command #

The develop command installs the current project in development/editable mode.

This is similar to pip install -e . when using pip.

New settings.virtualenvs.in-project setting #

The new settings.virtualenvs.in-project setting tells poetry to create new project virtualenvs in the project’s directory (.venv directory).

You can set it with the config command:

poetry config settings.virtualenvs.in-project true

If you no longer want this behavior, you can unset it:

poetry config settings.virtualenvs.in-project --unset

Other new features #

• Added the --extras and --python options to debug:resolve to help debug dependency resolution.
• Added a --src option to the new command to create an src layout.
• Added support for specifying the platform for dependencies.
• Added the --python option to the add command.
• Added the --platform option to the add command.

Changes #

publish command #

The publish command no longer builds the project by default.

The proper workflow now is to always use build before publish.

You can, however, use the --build option to retrieve the previous behavior.

show command #

The show command has been improved to make it easier to check if packages are properly installed.

script and run command #

The script command is now deprecated. You can now use run instead.

Other changes #

• Improved support for private repositories.
• Expanded version constraints now keep the original version’s precision.
• The lock file hash no longer uses the project’s name and version.
• The LICENSE file, or similar, is now automatically added to the built packages.

Fixes #

• Fixed the dependency resolver selecting incompatible packages.
• Fixed override of dependency with dependency with extras in dev-dependencies.