>= plus != generates invalid Requires-Dist

[dargueta]

• 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: Mac OS Big Sur 11.3.1
• Poetry version: 1.1.13 (core 1.1.8), also tried 1.1.8 (core 1.0.4)
• Link of a Gist with the contents of your pyproject.toml file: Files

Other versions:

pip: 22.0.4
setuptools: 62.1.0
wheel: 0.37.1

Issue

The following requirement:

google-api-python-client = ">=1.8,!=2.0.*"

generates this in the PKG-INFO source distribution:

Requires-Dist: google-api-python-client (>=1.8,<2.0.0 || >=2.1.0)

As you can see from the specification here, || is not included in the list of supported operators. When trying to install the package resulting from poetry build, pip (correctly) blows up with a syntax error while parsing PKG-INFO:

ERROR: Exception:
Traceback (most recent call last):
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3021, in _dep_map
    return self.__dep_map
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2815, in __getattr__
    raise AttributeError(attr)
AttributeError: _DistInfoDistribution__dep_map

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/packaging/requirements.py", line 102, in __init__
    req = REQUIREMENT.parseString(requirement_string)
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pyparsing/core.py", line 1134, in parse_string
    raise exc.with_traceback(None)
pip._vendor.pyparsing.exceptions.ParseException: Expected string_end, found '('  (at char 25), (line:1, col:26)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3101, in __init__
    super(Requirement, self).__init__(requirement_string)
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/packaging/requirements.py", line 105, in __init__
    f'Parse error at "{ requirement_string[e.loc : e.loc + 8]!r}": {e.msg}'
pip._vendor.packaging.requirements.InvalidRequirement: Parse error at "'(>=1.8,<'": Expected string_end

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_internal/cli/base_command.py", line 167, in exc_logging_wrapper
    status = run_func(*args)
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_internal/cli/req_command.py", line 205, in wrapper
    return func(self, options, args)
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_internal/commands/install.py", line 340, in run
    reqs, check_supported_wheels=not options.target_dir
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 181, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 422, in _resolve_one
    set(req_to_install.extras) - set(dist.iter_provided_extras())
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_internal/metadata/pkg_resources.py", line 205, in iter_provided_extras
    return self._dist.extras
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2978, in extras
    return [dep for dep in self._dep_map if dep]
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3023, in _dep_map
    self.__dep_map = self._compute_dependencies()
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3033, in _compute_dependencies
    reqs.extend(parse_requirements(req))
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3094, in parse_requirements
    yield Requirement(line)
  File "/Users/dargueta/.pyenv/versions/3.7.8/envs/gds/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3103, in __init__
    raise RequirementParseError(str(e))
pip._vendor.pkg_resources.RequirementParseError: Parse error at "'(>=1.8,<'": Expected string_end

I've also tried it a few other ways, and poetry generated an invalid constraint both times:

• ^1.8 || ^2.1 became >=1.8,<2.0 || >=2.1,<3.0
• >=1.8,<3.0.0,!=2.0.* became >=1.8,<3.0,<2.0.0 || >=2.1.0. This is actually wrong because <3.0 should be on the right-hand side.
• Changing the order to >=1.8,!=2.0.*,<3 became >=1.8,<2.0.0 || >=2.1.0,<3. Note the 3.0 constraint is now on the correct side.

The expected behavior would be:

• >=1.8,!=2.0.* remains the same
• >=1.8,<3.0.0,!=2.0.* also is unchanged
• ^1.8 || ^2.1 becomes something like >=1.8,<3.0.0,!=2.0.*

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