`pipenv install -e .` fails with “stat: can't specify None for path argument”

This happens when I run pipenv install -e . in an empty directory:

$ mkdir etiusrantesiunateruinate
$ cd etiusrantesiunateruinate
$ pipenv install -e .
Creating a virtualenv for this project…
⠋Using base prefix '/usr'
New python executable in /home/antoine/.local/share/virtualenvs/etiusrantesiunateruinate-Qd-Qq2kN/bin/python3
Also creating executable in /home/antoine/.local/share/virtualenvs/etiusrantesiunateruinate-Qd-Qq2kN/bin/python
Installing setuptools, pip, wheel...done.

Virtualenv location: /home/antoine/.local/share/virtualenvs/etiusrantesiunateruinate-Qd-Qq2kN
Creating a Pipfile for this project…
Installing -e .…
Traceback (most recent call last):
  File "/home/antoine/.local/bin//pipenv", line 11, in <module>
    sys.exit(cli())
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/cli.py", line 1880, in install
    converted = convert_deps_from_pip(package_name)
  File "/home/antoine/.local/lib/python3.5/site-packages/pipenv/utils.py", line 547, in convert_deps_from_pip
    os.path.isfile(req.name)) and not req.vcs:
  File "/usr/lib/python3.5/genericpath.py", line 30, in isfile
    st = os.stat(path)
TypeError: stat: can't specify None for path argument

Environment

$ cat /etc/debian_version 
buster/sid
$ python3 -V
Python 3.5.4
$ pipenv --version
pipenv, version 8.3.2

[techalchemy]

@motet-a er sorry,. I responded before I had my coffee this morning. You can’t pipenv install -e . in an empty directory because there is nothing to install. This is the same as if you pip install -e .. Both commands can only install a directory with a setup.py file, aka a python package. In this case it is not an argument parsing issue, it is an issue with not having something to install.

pipenv install must be passed either a package to install, or nothing (if there is a Pipfile in your directory already). There is an additional bug that affects installing local paths, but that doesn’t impact -e .

It is on our to-do list to improve the error messaging on this.

 ~  mkdir /tmp/test
 ~  cd /tmp/test
 /t/test  pip install -e .
Directory '.' is not installable. File 'setup.py' not found.

[techalchemy]

@wooyek your issue is not the same as this one but is a duplicate of #1104 #1028 #1012 #945 #939 and all the way back to #540. It is fixed in master by #958 and #1095 and you can use this workaround if you need: https://github.com/kennethreitz/pipenv/issues/1012#issuecomment-342898222