Poetry cannot resolve dependency from Qiskit Aer 0.6.0

[ikkoham]

• 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: macOS 10.15.6
• Poetry version: 1.0.10 and prerelease

How to reproduce?

poetry add qiskit-aer==0.6.0 to the blank env.

Issue

poetry add qiskit-aer==0.5.2 can resolve the dependency and install required packages.
However, from qiskit-aer==0.6.0, the dependency cannot be resolved, so poetry installs only qiskit-aer.

Related issue: Qiskit/qiskit-aer#880

[ikkoham]

maybe caused by https://github.com/Qiskit/qiskit-aer/pull/775/files

[abn]

When poetry inspects this package the sdist tarball gets downloaded. This is unpacked and inspected. The PKG-INFO contains the following.

Metadata-Version: 2.1
Name: qiskit-aer
Version: 0.6.1
Summary: Qiskit Aer - High performance simulators for Qiskit
Home-page: https://github.com/Qiskit/qiskit-aer
Author: AER Development Team
Author-email: qiskit@us.ibm.com
License: Apache 2.0
Description: # Qiskit Aer
<-- SNIPPED -->
Keywords: qiskit aer simulator quantum addon backend
Platform: UNKNOWN
Classifier: Environment :: Console
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Science/Research
Classifier: Operating System :: Microsoft :: Windows
Classifier: Operating System :: MacOS
Classifier: Operating System :: POSIX :: Linux
Classifier: Programming Language :: C++
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Topic :: Scientific/Engineering
Description-Content-Type: text/markdown

Note that this does not contain any requirement specifications (Requires-Dist: ). This causes poetry to fallback to parsing the setup.py. In qiskit-aer-0.5.2, this was easily parsed without error. However, qiskit-aer-0.6.2 contains the following that wil lcause the AST parser used to fail causing no dependencies to be detected.

PACKAGE_NAME = os.getenv('QISKIT_AER_PACKAGE_NAME', 'qiskit-aer')
...
setup(
    name=PACKAGE_NAME,
    ...
)

[github-actions]

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