Resolves: #6972

Added

• Mark the lock file with an @generated comment as used by common tooling (#2773).
• poetry check validates trove classifiers and warns for deprecations (#2881).
• Introduce a top level -C, --directory option to set the working path (#6810).

Changed

• New lock file format (version 2.0) (#6393).
• Path dependency metadata is unconditionally re-locked (#6843).
• URL dependency hashes are locked (#7121).
• poetry update and poetry lock should now resolve dependencies more similarly (#6477).
• poetry publish will report more useful errors when a file does not exist (#4417).
• poetry add will check for duplicate entries using canonical names (#6832).
• Wheels are preferred to source distributions when gathering metadata (#6547).
• Git dependencies of extras are only fetched if the extra is requested (#6615).
• Invoke pip with --no-input to prevent hanging without feedback (#6724, #6966).
• Invoke pip with --isolated to prevent the influence of user configuration (#6531).
• Interrogate environments with Python in isolated (-I) mode (#6628).
• Raise an informative error when multiple version constraints overlap and are incompatible (#7098).

Fixed

• Fix an issue where concurrent instances of Poetry would corrupt the artifact cache (#6186).
• Fix an issue where Poetry can hang after being interrupted due to stale locking in cache (#6471).
• Fix an issue where the output of commands executed with --dry-run contained duplicate entries (#4660).
• Fix an issue where requests's pool size did not match the number of installer workers (#6805).
• Fix an issue where poetry show --outdated failed with a runtime error related to direct origin dependencies (#6016).
• Fix an issue where only the last command of an ApplicationPlugin is registered (#6304).
• Fix an issue where git dependencies were fetched unnecessarily when running poetry lock --no-update (#6131).
• Fix an issue where stdout was polluted with messages that should go to stderr (#6429).
• Fix an issue with poetry shell activation and zsh (#5795).
• Fix an issue where a url dependencies were shown as outdated (#6396).
• Fix an issue where the source field of a dependency with extras was ignored (#6472).
• Fix an issue where a package from the wrong source was installed for a multiple-constraints dependency with different sources (#6747).
• Fix an issue where dependencies from different sources where merged during dependency resolution (#6679).
• Fix an issue where experimental.system-git-client could not be used via environment variable (#6783).
• Fix an issue where Poetry fails with an AssertionError due to distribution.files being None (#6788).
• Fix an issue where poetry env info did not respect virtualenvs.prefer-active-python (#6986).
• Fix an issue where poetry env list does not list the in-project environment (#6979).
• Fix an issue where poetry env remove removed the wrong environment (#6195).
• Fix an issue where the return code of a script was not relayed as exit code (#6824).
• Fix an issue where the solver could silently swallow ValueError (#6790).

Docs

• Improve documentation of package sources (#5605).
• Correct the default cache path on Windows (#7012).

poetry-core (1.4.0)

• The PEP 517 metadata_directory is now respected as an input to the build_wheel hook (#487).
• ParseConstraintError is now raised on version and constraint parsing errors, and includes information on the package that caused the error (#514).
• Fix an issue where invalid PEP 508 requirements were generated due to a missing space before semicolons (#510).
• Fix an issue where relative paths were encoded into package requirements, instead of a file:// URL as required by PEP 508 (#512).

poetry-plugin-export (^1.2.0)

• Ensure compatibility with Poetry 1.3.0. No functional changes.

cleo (^2.0.0)

• Fix an issue where shell completions had syntax errors (#247).
• Fix an issue where not reading all the output of a command resulted in a "Broken pipe" error (#165).
• Fix an issue where errors were not shown in non-verbose mode (#166).