--- Lib/distutils/command/bdist_rpm.py	2009-03-12 22:12:28.000000000 -0500
+++ Lib/distutils/command/bdist_rpm.py	2009-03-12 22:14:08.000000000 -0500
@@ -55,6 +55,65 @@
         print "%s-%s		%s-%s"%(sys.argv[2],sys.argv[3],v,r)
 
 
+def auto_requires():
+
+        try: import pkg_resources # no setuptools?
+        except ImportError: return "" # no autodeps!
+
+        try: # is there a requires.txt file in this dir?  then use the requirements
+                requirestext = file(
+                        glob.glob(
+                                os.path.join("*.egg-info","requires.txt")
+                )[0]).read()
+                requirestext = requirestext.split("[")[0]
+        except IndexError: # no requires.txt file? go on without it then
+                requirestext = ""
+
+        # parse the list of requirements
+        parsed_reqs = list(
+                pkg_resources.parse_requirements(
+                        "python\n" + requirestext))
+
+        for req in parsed_reqs:
+                # these requirements are not in the Cheese Shop
+                # but they are commonly packaged in distros with this name
+                # so we make the RPM depend on them if they were required
+                renamemap = {
+                        "setuptools" : "python-setuptools",
+                        "elementtree" : "python-elementtree"
+                }
+                if req.project_name in renamemap.keys():
+                        req.project_name = renamemap[req.project_name]
+
+                # now time to munge the version numbers
+                # to conform to the RPM lexicographical order
+                if req.specs:
+                        newspecs = []
+                        for spec in req.specs:
+                                verb,vers = spec
+                                spec = (verb,"%s-%s"%rewrite_lexicographically(vers,"1"))
+                                newspecs.append(spec)
+                        req.specs = newspecs
+
+        # stringify requirements
+        reqstrs = []
+        for req in parsed_reqs:
+                if req.specs:
+                        for spec in req.specs:
+                                n = req.project_name
+                                o,v = spec
+                                reqstrs.append( "%s %s %s" % (n,o,v) )
+                else: reqstrs.append(req.project_name)
+
+        # return the requirements ready to be tacked
+        # onto the Requires: line in the spec file
+        return ", ".join(reqstrs)
+
+# this is so you can test me by running python bdist_rpm.py rewrite <version> <release>
+if __name__ == "__main__" and "requires" in sys.argv:
+        print auto_requires()
+
+
 class bdist_rpm (Command):
 
     description = "create an RPM distribution"
@@ -484,6 +543,8 @@
             elif val is not None:
                 spec_file.append('%s: %s' % (field, val))
 
+        auto_reqs = auto_requires()
+        if auto_reqs: spec_file.append("Requires: %s"%auto_reqs)
 
         if self.distribution.get_url() != 'UNKNOWN':
             spec_file.append('Url: ' + self.distribution.get_url())