Pipenv install does not provide a good error message for no Pipfile.

Issue description

When attempting to run pipenv install --dev in the wrong spot I got this error below (not a bug I assume).

~ # pipenv install --dev
Creating a Pipfile for this project...
Traceback (most recent call last):
  File "/usr/local/bin/pipenv", line 11, in <module>
    sys.exit(cli())
  File "/usr/local/lib/python3.4/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.4/site-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.4/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.4/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.4/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python3.4/site-packages/pipenv/cli.py", line 435, in install
    selective_upgrade=selective_upgrade,
  File "/usr/local/lib/python3.4/site-packages/pipenv/core.py", line 1759, in do_install
    pypi_mirror=pypi_mirror,
  File "/usr/local/lib/python3.4/site-packages/pipenv/core.py", line 639, in ensure_project
    ensure_pipfile(validate=validate, skip_requirements=skip_requirements, system=system)
  File "/usr/local/lib/python3.4/site-packages/pipenv/core.py", line 288, in ensure_pipfile
    project.create_pipfile(python=python)
  File "/usr/local/lib/python3.4/site-packages/pipenv/project.py", line 576, in create_pipfile
    config_parser = ConfigOptionParser(name=self.name)
  File "/usr/local/lib/python3.4/site-packages/pipenv/patched/notpip/_internal/baseparser.py", line 141, in __init__
    assert self.name
AssertionError
~ #

Expected result

I would expect something about missing a Pipfile or some such. Probaly something along these lines.

AssertionError("Could not find Pipfile.")

Actual result

Instead I just got AssertionError().

Steps to replicate

mkdir foo
cd foo
pipenv install --dev

---

$ pipenv --support

Pipenv version: '2018.7.1'

Pipenv location: '/usr/local/lib/python3.4/site-packages/pipenv'

Python location: '/usr/local/bin/python'

Other Python installations in PATH:

• 3.4: /usr/local/bin/python3.4m

• 3.4: /usr/local/bin/python3.4

• 3.4: /usr/local/bin/python3.4

• 3.4.9: /usr/local/bin/python

• 3.4.9: /usr/local/bin/python

• 3.4.9: /usr/local/bin/python3

• 3.4.9: /usr/local/bin/python3

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.4.9',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '4.15.0-33-generic',
 'platform_system': 'Linux',
 'platform_version': '#36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018',
 'python_full_version': '3.4.9',
 'python_version': '3.4',
 'sys_platform': 'linux'}

System environment variables:

• PYTHONDONTWRITEBYTECODE
• https_proxy
• http_proxy
• HOME
• HTTPS_PROXY
• LANG
• PWD
• no_proxy
• PATH
• HOSTNAME
• PIP_PYTHON_PATH
• OLDPWD
• NO_PROXY
• GPG_KEY
• HTTP_PROXY
• TERM
• PYTHON_PIP_VERSION
• SHLVL
• PYTHON_VERSION

Pipenv–specific environment variables:

Debug–specific environment variables:

• PATH: /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
• LANG: C.UTF-8
• PWD: /

---

Contents of Pipfile (‘/Pipfile’):

[jr7square]

I’ll pick this up since the previous PR isn’t merged.

[andb0t]

Any update on this? I’m encountering the same error when installing pipenv in a fresh alpine dockerfile:

FROM alpine:latest

# install python3 and pipenv
RUN apk add --no-cache --virtual .build-deps g++ python3-dev libffi-dev openssl-dev \
    && apk add --no-cache --update python3 \
    && pip3 install --upgrade pip setuptools pipenv

Running this causes the error:

docker build -t pipenv-test .
docker run -it pipenv-test sh
pipenv shell