Add --quiet flag

bin/jekyll

@@ -15,6 +15,7 @@ def add_build_options(c)
   c.option 'watch',   '-w', '--watch', 'Watch for changes and rebuild'
   c.option 'lsi',     '--lsi', 'Use LSI for improved related posts'
   c.option 'show_drafts',  '-D', '--drafts', 'Render posts in the _drafts folder'
+  c.option 'quiet', '-q', '--quiet', 'Silence output.'
   c.option 'verbose', '-V', '--verbose', 'Print verbose output.'
 end
 

lib/jekyll/commands/build.rb

@@ -4,6 +4,8 @@ module Jekyll
       def self.process(options)
         site = Jekyll::Site.new(options)
 
+        Jekyll.logger.log_level = Jekyll::Stevenson::ERROR if options['quiet']
+
         self.build(site, options)
         self.watch(site, options) if options['watch']
       end