POETRY_VIRTUALENVS_CREATE=false breaks poetry 1.2.0a2

[1ace]

• 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: docker image python:3.7-slim (debian-based)

• Poetry version: 1.2.0a2

• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/a53c402eaab6b1ae204019624972fb44
  ☝️ contains the pyproject.toml & poetry.lock, as well as a minimal Dockerfile which reproduces the issue. Simply run docker build . to reproduce locally.

Issue

When POETRY_VIRTUALENVS_CREATE=false is set, poetry breaks itself during poetry install, as can be seen with the reproducer provided.

click to show the poetry exception stack trace

 > [6/6] RUN poetry -vvv export:
#10 0.360
#10 0.360   ImportError
#10 0.360
#10 0.360   cannot import name 'metadata' from 'importlib' (/usr/local/lib/python3.7/importlib/__init__.py)
#10 0.360
#10 0.360   at ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/poetry/utils/_compat.py:5 in <module>
#10 0.366         1│ import sys
#10 0.366         2│
#10 0.366         3│
#10 0.366         4│ try:
#10 0.366     →   5│     from importlib import metadata
#10 0.366         6│ except ImportError:
#10 0.366         7│     # compatibility for python <3.8
#10 0.366         8│     import importlib_metadata as metadata  # noqa
#10 0.366         9│
#10 0.394
#10 0.394 The following error occurred when trying to handle this error:
#10 0.394
#10 0.394
#10 0.394   Stack trace:
#10 0.395
#10 0.395   16  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/cleo/application.py:330 in run
#10 0.420        328│
#10 0.420        329│             try:
#10 0.420      → 330│                 exit_code = self._run(io)
#10 0.420        331│             except Exception as e:
#10 0.420        332│                 if not self._catch_exceptions:
#10 0.420
#10 0.421   15  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/poetry/console/application.py:180 in _run
#10 0.435        178│         self._load_plugins(io)
#10 0.435        179│
#10 0.435      → 180│         return super()._run(io)
#10 0.436        181│
#10 0.436        182│     def _configure_io(self, io: IO) -> None:
#10 0.436
#10 0.436   14  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/cleo/application.py:375 in _run
#10 0.461        373│             pass
#10 0.461        374│
#10 0.461      → 375│         name = self._get_command_name(io)
#10 0.461        376│         if io.input.has_parameter_option(["--help", "-h"], True):
#10 0.462        377│             if not name:
#10 0.462
#10 0.462   13  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/cleo/application.py:597 in _get_command_name
#10 0.490        595│
#10 0.490        596│             for candidate in reversed(candidates):
#10 0.490      → 597│                 if self.has(candidate):
#10 0.490        598│                     return candidate
#10 0.490        599│
#10 0.490
#10 0.490   12  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/cleo/application.py:235 in has
#10 0.516        233│
#10 0.516        234│         return self._command_loader.has(name) and self.add(
#10 0.516      → 235│             self._command_loader.get(name)
#10 0.516        236│         )
#10 0.516        237│
#10 0.516
#10 0.516   11  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/cleo/loaders/factory_command_loader.py:32 in get
#10 0.517         30│         factory = self._factories[name]
#10 0.517         31│
#10 0.517      →  32│         return factory()
#10 0.518         33│
#10 0.518
#10 0.518   10  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/poetry/console/application.py:38 in _load
#10 0.534         36│     def _load() -> Type[Command]:
#10 0.534         37│         module = import_module(
#10 0.534      →  38│             "poetry.console.commands.{}".format(".".join(name.split(" ")))
#10 0.534         39│         )
#10 0.534         40│         command_class = getattr(
#10 0.534
#10 0.534    9  /usr/local/lib/python3.7/importlib/__init__.py:127 in import_module
#10 0.541        125│                 break
#10 0.541        126│             level += 1
#10 0.541      → 127│     return _bootstrap._gcd_import(name[level:], package, level)
#10 0.541        128│
#10 0.541        129│
#10 0.541
#10 0.541    8  <frozen importlib._bootstrap>:1006 in _gcd_import
#10 0.541
#10 0.541    7  <frozen importlib._bootstrap>:983 in _find_and_load
#10 0.541
#10 0.541    6  <frozen importlib._bootstrap>:967 in _find_and_load_unlocked
#10 0.542
#10 0.542    5  <frozen importlib._bootstrap>:677 in _load_unlocked
#10 0.542
#10 0.542    4  <frozen importlib._bootstrap_external>:728 in exec_module
#10 0.542
#10 0.542    3  <frozen importlib._bootstrap>:219 in _call_with_frames_removed
#10 0.542
#10 0.542    2  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/poetry/console/commands/export.py:3 in <module>
#10 0.545          1│ from cleo.helpers import option
#10 0.545          2│
#10 0.546      →   3│ from poetry.utils.exporter import Exporter
#10 0.546          4│
#10 0.546          5│ from .command import Command
#10 0.546
#10 0.546    1  ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/poetry/utils/exporter.py:12 in <module>
#10 0.553         10│ from poetry.core.packages.utils.utils import path_to_url
#10 0.553         11│ from poetry.poetry import Poetry
#10 0.553      →  12│ from poetry.utils._compat import decode
#10 0.553         13│
#10 0.553         14│
#10 0.553
#10 0.553   ModuleNotFoundError
#10 0.553
#10 0.553   No module named 'importlib_metadata'
#10 0.554
#10 0.554   at ~/.local/share/pypoetry/venv/lib/python3.7/site-packages/poetry/utils/_compat.py:8 in <module>
#10 0.556         4│ try:
#10 0.556         5│     from importlib import metadata
#10 0.556         6│ except ImportError:
#10 0.556         7│     # compatibility for python <3.8
#10 0.556     →   8│     import importlib_metadata as metadata  # noqa
#10 0.556         9│
#10 0.556        10│ WINDOWS = sys.platform == "win32"
#10 0.556        11│
#10 0.556        12│
------
executor failed running [/bin/sh -c poetry -vvv export]: exit code: 1

Note that the same thing happens with various other libs (eg. requests) on various python versions (issue happens on 3.{7,8,9}, the 3 versions that we have to support); this is not about importlib_metadata or python 3.7.

I expect the same issue to arise with every lib that poetry also uses.

[ajhynes7]

I found this issue from searching about the same problem. Poetry 1.2.0a2 failed for me when installing dependencies outside of a virtual environment in Docker.

[1ace]

As 1.2.0b1 just came out, I tried again and the bug seems to be fixed. Thank you to whoever did that 😄

Closing.

[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.