Fix for http://bugs.python.org/setuptools/issue7 (backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4065943

setuptools/package_index.py

@@ -220,7 +220,8 @@ class PackageIndex(Environment):
             map(self.add, dists)
 
     def url_ok(self, url, fatal=False):
-        if self.allows(urlparse.urlparse(url)[1]):
+        s = URL_SCHEME(url)
+        if (s and s.group(1).lower()=='file') or self.allows(urlparse.urlparse(url)[1]):
             return True
         msg = "\nLink to % s ***BLOCKED*** by --allow-hosts\n"
         if fatal:
@@ -243,7 +244,6 @@ class PackageIndex(Environment):
                 dist.precedence = SOURCE_DIST
                 self.add(dist)
 
-
     def process_index(self,url,page):
         """Process the contents of a PyPI page"""
         def scan(link):

setuptools/tests/test_packageindex.py

@@ -17,3 +17,11 @@ class TestPackageIndex(unittest.TestCase):
             self.assert_(url in str(v))
         else:
             self.assert_(isinstance(v,urllib2.HTTPError))
+
+    def test_url_ok(self):
+        index = setuptools.package_index.PackageIndex(
+            hosts=('www.example.com',)
+        )
+        url = 'file:///tmp/test_package_index'
+        self.assert_(index.url_ok(url, True))
+