diff -r 87bea4981d6d -r 22d57b0e0a77 extra/soundsoftware/create-repo-authormaps.rb
--- a/extra/soundsoftware/create-repo-authormaps.rb
+++ b/extra/soundsoftware/create-repo-authormaps.rb
@@ -73,6 +73,7 @@
   next unless proj.respond_to?(:repository)
 
   repo = proj.repository
+  next if repo.nil? or repo.url.empty?
 
   repo_url = repo.url
   repo_url = repo_url.gsub(/^file:\/*/, "/");
@@ -88,11 +89,11 @@
   committers.each do |c|
     if not c =~ /[^<]+<.*@.*>/ then
       user = repo.find_committer_user c
-      authormap << "#{c}=#{u.name} <#{u.mail}>\n" unless u.nil?
+      authormap << "#{c}=#{user.name} <#{user.mail}>\n" unless user.nil?
     end
   end
 
-  File.open (File.join($out_base, "authormap_#{proj.identifier}"), "w") do |f|
+  File.open(File.join($out_base, "authormap_#{proj.identifier}"), "w") do |f|
     f.puts(authormap)
   end