make pbuilder result directory a package repository (#44243)

eobuilder-ctl

@@ -354,9 +354,13 @@ def send_packages(dist, arch, project, package, last_tag):
         print('+ Already uploaded')
         return
 
-    print("+ Sending package...")
     pbuilder_project_result = os.path.join(settings.PBUILDER_RESULT,
             '%s-%s' % (dist, arch))
+
+    print("+ Updating local repository...")
+    subprocess.check_call('apt-ftparchive packages . | gzip > Packages.gz', cwd=pbuilder_project_result, shell=True)
+
+    print("+ Sending package...")
     os.chdir(pbuilder_project_result)
     call("dput -u %s %s_%s_%s.changes" % \
             (package['repository'],