[Patch #683939] Add download_url field to metadata
diff --git a/Lib/distutils/dist.py b/Lib/distutils/dist.py
index f15c945..08e2a4f 100644
--- a/Lib/distutils/dist.py
+++ b/Lib/distutils/dist.py
@@ -966,7 +966,8 @@
                          "maintainer", "maintainer_email", "url",
                          "license", "description", "long_description",
                          "keywords", "platforms", "fullname", "contact",
-                         "contact_email", "licence", "classifiers")
+                         "contact_email", "licence", "classifiers",
+                         "download_url")
 
     def __init__ (self):
         self.name = None
@@ -982,6 +983,7 @@
         self.keywords = None
         self.platforms = None
         self.classifiers = None
+        self.download_url = None
 
     def write_pkg_info (self, base_dir):
         """Write the PKG-INFO file into the release tree.
@@ -997,6 +999,8 @@
         pkg_info.write('Author: %s\n' % self.get_contact() )
         pkg_info.write('Author-email: %s\n' % self.get_contact_email() )
         pkg_info.write('License: %s\n' % self.get_license() )
+        if self.download_url:
+            pkg_info.write('Download-URL: %s\n' % self.download_url)
 
         long_desc = rfc822_escape( self.get_long_description() )
         pkg_info.write('Description: %s\n' % long_desc)
@@ -1070,6 +1074,9 @@
     def get_classifiers(self):
         return self.classifiers or []
 
+    def get_download_url(self):
+        return self.download_url or "UNKNOWN"
+
 # class DistributionMetadata