requirementslib will fail with `AttributeError: 'JoinedStr' object has no attribute 's'` when there is f-string in `install_requires`

[alexanderdevm]

requirementslib will fail with AttributeError: 'JoinedStr' object has no attribute 's' when there is f-string or string contact in install_requires within setup.py.

Example of code: https://github.com/alexanderdevm/test-lib-1/blob/main/setup.py

error:

pipenv install --verbose
Installing dependencies from Pipfile.lock (19667c)...
/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/patched/notpip/_internal/operations/prepare.py:226: PipDeprecationWarning: DEPRECATION: A future pip version will change local packages to be built in-place without first copying to a temporary directory. We recommend you use --use-feature=in-tree-build to test your packages with this new behavior before it becomes the default.
 pip 21.3 will remove support for this functionality. You can find discussion regarding this at https://github.com/pypa/pip/issues/7555.
  issue=7555
Traceback (most recent call last):
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/bin/pipenv", line 8, in <module>
    sys.exit(cli())
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1128, in __call__
    return self.main(*args, **kwargs)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/decorators.py", line 84, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/cli/command.py", line 215, in install
    site_packages=state.site_packages
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/core.py", line 2008, in do_install
    keep_outdated=keep_outdated
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/core.py", line 1269, in do_init
    pypi_mirror=pypi_mirror,
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/core.py", line 824, in do_install_dependencies
    project, normal_deps, procs, failed_deps_queue, requirements_dir, **install_kwargs
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/core.py", line 688, in batch_install
    dep for dep in deps_to_install if not project.environment.is_satisfied(dep)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/core.py", line 688, in <listcomp>
    dep for dep in deps_to_install if not project.environment.is_satisfied(dep)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/environment.py", line 776, in is_satisfied
    vcs_type == req.vcs and commit_id == req.commit_hash
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/cached_property.py", line 36, in __get__
    value = obj.__dict__[self.func.__name__] = self.func(obj)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/requirements.py", line 2491, in commit_hash
    with self.req.locked_vcs_repo() as repo:
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/contextlib.py", line 112, in __enter__
    return next(self.gen)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/requirements.py", line 2223, in locked_vcs_repo
    self._parsed_line.vcsrepo = vcsrepo
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/requirements.py", line 907, in vcsrepo
    kwargs=wheel_kwargs,
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 1598, in create
    created.get_initial_info()
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 1431, in get_initial_info
    parsed.update(self.parse_setup_py())
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 1162, in parse_setup_py
    parsed = ast_parse_setup_py(self.setup_py.as_posix())
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 880, in ast_parse_setup_py
    return SetupReader.read_setup_py(Path(path), raising)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 205, in read_setup_py
    "install_requires": caller(cls._find_install_requires, setup_call, body),
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 197, in caller
    return func(*args, **kwargs)
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 360, in _find_install_requires
    return [el.s for el in value.elts]
  File "/home/SYS/comp1/.pyenv/versions/3.7.13/lib/python3.7/site-packages/pipenv/vendor/requirementslib/models/setup_info.py", line 360, in <listcomp>
    return [el.s for el in value.elts]
AttributeError: 'JoinedStr' object has no attribute 's'

Steps to reproduce:

git clone https://github.com/alexanderdevm/pipenv-bug-repro.git
cd pipenv-bug-repro
pipenv install 

Pipenv ticket ref: pypa/pipenv#5167