From 252be3257823fd13e722c8aa8c944be898fc37bb Mon Sep 17 00:00:00 2001
From: Max Krivich <maxkrivich@gmail.com>
Date: Wed, 20 Jun 2018 13:17:13 +0300
Subject: [PATCH] Fix cli option usage error Fix IndexError exception when
 `more_packages` is empty and add the more informal message for argument
 usage.

To reproduce this issue `pipenv install -e`
---
 pipenv/core.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pipenv/core.py b/pipenv/core.py
index be67c8f5..faa54807 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -1889,6 +1889,8 @@ def do_install(
     # Capture -e argument and assign it to following package_name.
     more_packages = list(more_packages)
     if package_name == '-e':
+        if not more_packages:
+            raise click.BadArgumentUsage('Please provide path to setup.py')
         package_name = ' '.join([package_name, more_packages.pop(0)])
     # capture indexes and extra indexes
     line = [package_name] + more_packages