Refactor GitHub changelog generator print special infra (#14795)

scripts/github-changelog.cr

@@ -367,32 +367,37 @@ puts
 puts "[#{milestone.title}]: https://github.com/#{repository}/releases/#{milestone.title}"
 puts
 
+def print_items(prs)
+  prs.each do |pr|
+    puts "- #{pr}"
+  end
+  puts
+
+  prs.each(&.print_ref_label(STDOUT))
+  puts
+end
+
 SECTION_TITLES.each do |id, title|
   prs = sections[id]? || next
   puts "### #{title}"
   puts
 
-  topics = prs.group_by(&.primary_topic)
+  if id == "infra"
+    prs.sort_by!(&.infra_sort_tuple)
+    print_items prs
+  else
+    topics = prs.group_by(&.primary_topic)
 
-  topic_titles = topics.keys.sort_by! { |k| TOPIC_ORDER.index(k) || Int32::MAX }
+    topic_titles = topics.keys.sort_by! { |k| TOPIC_ORDER.index(k) || Int32::MAX }
 
-  topic_titles.each do |topic_title|
-    topic_prs = topics[topic_title]? || next
+    topic_titles.each do |topic_title|
+      topic_prs = topics[topic_title]? || next
 
-    if id == "infra"
-      topic_prs.sort_by!(&.infra_sort_tuple)
-    else
-      topic_prs.sort!
       puts "#### #{topic_title}"
       puts
-    end
 
-    topic_prs.each do |pr|
-      puts "- #{pr}"
+      topic_prs.sort!
+      print_items topic_prs
     end
-    puts
-
-    topic_prs.each(&.print_ref_label(STDOUT))
-    puts
   end
 end