Preserve the query portion of URL-type InstallRequirement URLs.

With this patch, install commands like:

  pip install 'http://foo.com/?p=bar.git;a=snapshot;h=v0.3;sf=tgz'

will work as expected.

pip/index.py

@@ -621,6 +621,11 @@ class Link(object):
         url = url.rstrip('/')
         return url
 
+    @property
+    def url_without_fragment(self):
+        scheme, netloc, path, query, fragment = urlparse.urlsplit(self.url)
+        return urlparse.urlunsplit((scheme, netloc, path, query, None))
+
     _egg_fragment_re = re.compile(r'#egg=([^&]*)')
 
     @property

pip/req.py

@@ -95,7 +95,7 @@ class InstallRequirement(object):
         # If the line has an egg= definition, but isn't editable, pull the requirement out.
         # Otherwise, assume the name is the req for the non URL/path/archive case.
         if link and req is None:
-            url = link.url_fragment
+            url = link.url_without_fragment
             req = link.egg_fragment
 
             # Handle relative file URLs