discourse/lib/tasks/posts.rake

desc 'Update each post with latest markdown'
task 'posts:rebake' => :environment do
  rebake_posts
end

desc 'Update each post with latest markdown and refresh oneboxes'
task 'posts:refresh_oneboxes' => :environment do
  rebake_posts invalidate_oneboxes: true
end

def rebake_posts(opts = {})
  RailsMultisite::ConnectionManagement.each_connection do |db|
    puts "Re baking post markdown for #{db} , changes are denoted with # , no change with ."

    total = Post.select([
      :id, :user_id, :cooked, :raw, :topic_id, :post_number
    ]).inject(0) do |total, post|
      cooked = post.cook(
        post.raw,
        topic_id: post.topic_id,
        invalidate_oneboxes: opts.fetch(:invalidate_oneboxes, false)
      )

      if cooked != post.cooked
        Post.exec_sql(
          'update posts set cooked = ? where id = ?', cooked, post.id
        )
        post.cooked = cooked
        putc "#"
      else
        putc "."
      end

      TopicLink.extract_from post

      total += 1
    end

    puts "\n\n#{total} posts done!\n#{'-' * 50}\n"
  end
end