Improvements to mbox import script

* Ignore errors during indexing and show information about the message causing the problem
* Always activate imported users if they aren't staged

script/import_scripts/mbox/importer.rb

@@ -70,7 +70,7 @@ module ImportScripts::Mbox
             name: row['name'],
             trust_level: @settings.trust_level,
             staged: @settings.staged,
-            active: false,
+            active: !@settings.staged,
             created_at: to_time(row['date_of_first_message'])
           }
         end

script/import_scripts/mbox/support/indexer.rb

@@ -62,6 +62,7 @@ module ImportScripts::Mbox
 
     def index_emails(directory, category_name)
       all_messages(directory, category_name) do |receiver, filename, opts|
+        begin
           msg_id = receiver.message_id
           parsed_email = receiver.mail
           from_email, from_display_name = receiver.parse_from_field(parsed_email)
@@ -91,6 +92,16 @@ module ImportScripts::Mbox
             db.insert_email(email)
             db.insert_replies(msg_id, reply_message_ids) unless reply_message_ids.empty?
           end
+        rescue StandardError => e
+          if opts[:first_line_number] && opts[:last_line_number]
+            STDERR.puts "Failed to index message in #{filename} at lines #{opts[:first_line_number]}-#{opts[:last_line_number]}"
+          else
+            STDERR.puts "Failed to index message in #{filename}"
+          end
+
+          STDERR.puts e.message
+          STDERR.puts e.backtrace.inspect
+        end
       end
     end