improvements to the mbox import script

* ignores dot-files and empty emails
* new setting to prefer HTML over plaintext emails during import
* restore original site settings at the end of import
* elided content of HTML mails was not put inside details block

script/.gitignore

@@ -1 +1,2 @@
 tmp/*
+settings.local.yml

script/import_scripts/mbox/importer.rb

@@ -13,10 +13,11 @@ module ImportScripts::Mbox
       @database = Database.new(@settings.data_dir, @settings.batch_size)
     end
 
-    def change_site_settings
-      super
-
-      SiteSetting.enable_staged_users = true
+    def get_site_settings_for_import
+      settings = super
+      settings[:enable_staged_users] = true
+      settings[:incoming_email_prefer_html] = @settings.prefer_html
+      settings
     end
 
     protected
@@ -120,7 +121,7 @@ module ImportScripts::Mbox
       when Email::Receiver::formats[:markdown]
         body = email_body
         body << attachment_html if attachment_html.present?
-        body << elided if elided.present?
+        body << Email::Receiver.elided_html(elided) if elided.present?
       when Email::Receiver::formats[:plaintext]
         body =  %|[plaintext]\n#{escape_tags(email_body)}\n[/plaintext]|
         body << %|\n[attachments]\n#{escape_tags(attachment_html)}\n[/attachments]| if attachment_html.present?

script/import_scripts/mbox/settings.yml

@@ -1,9 +1,10 @@
 # PostgreSQL mailing lists
-#data_dir: /data/import/postgres
+#data_dir: /shared/import/data
 #split_regex: "^From .*@postgresql.org.*"
 
 # ruby-talk mailing list
-data_dir: /data/import/ruby-talk/news/gmane/comp/lang/ruby
+data_dir: /shared/import/data
 split_regex: ""
 
 default_trust_level: 1
+prefer_html: false

script/import_scripts/mbox/support/indexer.rb

@@ -102,10 +102,12 @@ module ImportScripts::Mbox
 
         if @split_regex.present?
           each_mail(filename) do |raw_message, first_line_number, last_line_number|
-            yield read_mail_from_string(raw_message), filename, first_line_number, last_line_number
+            receiver = read_mail_from_string(raw_message)
+            yield receiver, filename, first_line_number, last_line_number if receiver.present?
           end
         else
-          yield read_mail_from_file(filename), filename
+          receiver = read_mail_from_file(filename)
+          yield receiver, filename if receiver.present?
         end
 
         mark_as_fully_indexed(category_name, filename)
@@ -161,7 +163,7 @@ module ImportScripts::Mbox
     end
 
     def read_mail_from_string(raw_message)
-      Email::Receiver.new(raw_message)
+      Email::Receiver.new(raw_message) unless raw_message.blank?
     end
 
     def extract_reply_message_ids(mail)
@@ -208,7 +210,12 @@ module ImportScripts::Mbox
     end
 
     def ignored_file?(filename, checksums)
-      File.directory?(filename) || metadata_file?(filename) || fully_indexed?(filename, checksums)
+      File.directory?(filename) || hidden_file?(filename) ||
+        metadata_file?(filename) || fully_indexed?(filename, checksums)
+    end
+
+    def hidden_file?(filename)
+      File.basename(filename).start_with?('.')
     end
 
     def metadata_file?(filename)

script/import_scripts/mbox/support/settings.rb

@@ -11,12 +11,14 @@ module ImportScripts::Mbox
     attr_reader :split_regex
     attr_reader :batch_size
     attr_reader :trust_level
+    attr_reader :prefer_html
 
     def initialize(yaml)
       @data_dir = yaml['data_dir']
       @split_regex = Regexp.new(yaml['split_regex']) unless yaml['split_regex'].empty?
       @batch_size = 1000 # no need to make this actually configurable at the moment
       @trust_level = yaml['default_trust_level']
+      @prefer_html = yaml['prefer_html']
     end
   end
 end