proper casing for installing package names

Fixes #78

Pipfile

@@ -8,4 +8,5 @@ requirements-parser = "*"
 "backports.shutil_get_terminal_size" = "*"
 parse = "*"
 toml = "*"
+requests = "*"
 click = "*"

Pipfile.lock

@@ -36,6 +36,10 @@
             "version": "==0.3.7",
             "hash": "sha256:a4c0f5bc358a62849653471e309dcc991223cf86abafbec17cd8f41327279e89"
         },
+        "requests": {
+            "version": "==2.13.0",
+            "hash": "sha256:1a720e8862a41aa22e339373b526f508ef0c8988baf48b84d3fc891a8e237efb"
+        },
         "click": {
             "version": "==6.7",
             "hash": "sha256:29f99fc6125fbc931b758dc053b3114e55c77a6e4c6c3a2674a2dc986016381d"
@@ -79,6 +83,6 @@
             }
         ],
         "requires": {},
-        "Pipfile-sha256": "bceb0e55b886dea8ff6ada0dfe673c18a010695c160b0643e93c0fb6c5337fd6"
+        "Pipfile-sha256": "24f12b631b7c40b8c5eff934a1aef263ed04f5eaffb4acf4706442f3d23cba36"
     }
 }

pipenv/cli.py

@@ -6,6 +6,7 @@ import sys
 import distutils.spawn
 import shutil
 import signal
+from HTMLParser import HTMLParser
 
 # Backport required for earlier versions of Python.
 if sys.version_info < (3, 3):
@@ -18,6 +19,7 @@ import crayons
 import delegator
 import parse
 import pexpect
+import requests
 
 from . import _pipfile as pipfile
 from .project import Project
@@ -396,6 +398,26 @@ def which_pip(allow_global=False):
 
     return which('pip')
 
+def proper_case(package_name):
+
+    # Capture tag contents here.
+    collected = []
+
+    class SimpleHTMLParser(HTMLParser):
+        def handle_data(self, data):
+            if len(data) > 2:
+                collected.append(data)
+
+    # Hit the simple API.
+    r = requests.get('{0}/{1}'.format(project.source['url'], package_name))
+
+    # Parse the HTML.
+    parser = SimpleHTMLParser()
+    parser.feed(r.content)
+
+    # Use the last link on the page, use it to get proper casing.
+    return parse_download_fname(collected[-1])[0]
+
 def format_help(help):
     """Formats the help string."""
     help = help.replace('  check', str(crayons.green('  check')))
@@ -499,8 +521,8 @@ def install(package_name=False, more_packages=False, dev=False, three=False, sys
 
     for package_name in package_names:
 
-        # Lower-case incoming package name.
-        package_name = package_name
+        # Proper-case incoming package name (check against API).
+        package_name = proper_case(package_name)
 
         click.echo('Installing {0}...'.format(crayons.green(package_name)))
 

setup.py

@@ -32,7 +32,8 @@ required = [
     'virtualenv',
     'delegator.py>=0.0.6',
     'requirements-parser',
-    'pexpect'
+    'pexpect',
+    'requests'
 ]
 
 # Backport required for earlier versions of Python.