Module: Jekyll::WordPress

Defined in:
lib/jekyll/migrators/wordpress.rb

Class Method Summary collapse

Class Method Details

.clean_entities(text) ⇒ Object 



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# File 'lib/jekyll/migrators/wordpress.rb', line 267

def self.clean_entities( text )
  if text.respond_to?(:force_encoding)
    text.force_encoding("UTF-8")
  end
  text = HTMLEntities.new.encode(text, :named)
  # We don't want to convert these, it would break all
  # HTML tags in the post and comments.
  text.gsub!("&", "&")
  text.gsub!("&lt;", "<")
  text.gsub!("&gt;", ">")
  text.gsub!("&quot;", '"')
  text.gsub!("&apos;", "'")
  text
end

.process(dbname, user, pass, host = 'localhost', options = {}) ⇒ Object

Main migrator function. Call this to perform the migration.

dbname

The name of the database

user

The database user name

pass

The database user’s password

host

The address of the MySQL database host. Default: ‘localhost’

options

A hash table of configuration options.

Supported options are:

:table_prefix

Prefix of database tables used by WordPress. Default: ‘wp_’

:clean_entities

If true, convert non-ASCII characters to HTML entities in the posts, comments, titles, and names. Requires the ‘htmlentities’ gem to work. Default: true.

:comments

If true, migrate post comments too. Comments are saved in the post’s YAML front matter. Default: true.

:categories

If true, save the post’s categories in its YAML front matter.

:tags

If true, save the post’s tags in its YAML front matter.

:more_excerpt

If true, when a post has no excerpt but does have a <!– more –> tag, use the preceding post content as the excerpt. Default: true.

:more_anchor

If true, convert a <!– more –> tag into two HTML anchors with ids “more” and “more-NNN” (where NNN is the post number). Default: true.

:status

Array of allowed post statuses. Only posts with matching status will be migrated. Known statuses are :publish, :draft, :private, and :revision. If this is nil or an empty array, all posts are migrated regardless of status. Default: [:publish].



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# File 'lib/jekyll/migrators/wordpress.rb', line 53

def self.process(dbname, user, pass, host='localhost', options={})
  options = {
    :table_prefix   => 'wp_',
    :clean_entities => true,
    :comments       => true,
    :categories     => true,
    :tags           => true,
    :more_excerpt   => true,
    :more_anchor    => true,
    :status         => [:publish] # :draft, :private, :revision
  }.merge(options)

  if options[:clean_entities]
    begin
      require 'htmlentities'
    rescue LoadError
      STDERR.puts "Could not require 'htmlentities', so the " +
                  ":clean_entities option is now disabled."
      options[:clean_entities] = false
    end
  end

  FileUtils.mkdir_p("_posts")

  db = Sequel.mysql(dbname, :user => user, :password => pass,
                    :host => host, :encoding => 'utf8')

  px = options[:table_prefix]

  posts_query = "
     SELECT
       posts.ID            AS `id`,
       posts.guid          AS `guid`,
       posts.post_type     AS `type`,
       posts.post_status   AS `status`,
       posts.post_title    AS `title`,
       posts.post_name     AS `slug`,
       posts.post_date     AS `date`,
       posts.post_content  AS `content`,
       posts.post_excerpt  AS `excerpt`,
       posts.comment_count AS `comment_count`,
       users.display_name  AS `author`,
       users.user_login    AS `author_login`,
       users.user_email    AS `author_email`,
       users.user_url      AS `author_url`
     FROM #{px}posts AS `posts`
       LEFT JOIN #{px}users AS `users`
         ON posts.post_author = users.ID"

  if options[:status] and not options[:status].empty?
    status = options[:status][0]
    posts_query << "
     WHERE posts.post_status = '#{status.to_s}'"
    options[:status][1..-1].each do |status|
      posts_query << " OR
       posts.post_status = '#{status.to_s}'"
    end
  end

  db[posts_query].each do |post|
    process_post(post, db, options)
  end
end

.process_post(post, db, options) ⇒ Object 



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# File 'lib/jekyll/migrators/wordpress.rb', line 118

def self.process_post(post, db, options)
  px = options[:table_prefix]

  title = post[:title]
  if options[:clean_entities]
    title = clean_entities(title)
  end

  slug = post[:slug]
  if !slug or slug.empty?
    slug = sluggify(title)
  end

  date = post[:date] || Time.now
  name = "%02d-%02d-%02d-%s.markdown" % [date.year, date.month,
                                         date.day, slug]
  content = post[:content].to_s
  if options[:clean_entities]
    content = clean_entities(content)
  end

  excerpt = post[:excerpt].to_s

  more_index = content.index(/<!-- *more *-->/)
  more_anchor = nil
  if more_index
    if options[:more_excerpt] and
        (post[:excerpt].nil? or post[:excerpt].empty?)
      excerpt = content[0...more_index]
    end
    if options[:more_anchor]
      more_link = "more"
      content.sub!(/<!-- *more *-->/,
                   "<a id=\"more\"></a>" + 
                   "<a id=\"more-#{post[:id]}\"></a>")
    end
  end

  categories = []
  tags = []

  if options[:categories] or options[:tags]

    cquery =
      "SELECT
         terms.name AS `name`,
         ttax.taxonomy AS `type`
       FROM
         #{px}terms AS `terms`,
         #{px}term_relationships AS `trels`,
         #{px}term_taxonomy AS `ttax`
       WHERE
         trels.object_id = '#{post[:id]}' AND
         trels.term_taxonomy_id = ttax.term_taxonomy_id AND
         terms.term_id = ttax.term_id"

    db[cquery].each do |term|
      if options[:categories] and term[:type] == "category"
        if options[:clean_entities]
          categories << clean_entities(term[:name])
        else
          categories << term[:name]
        end
      elsif options[:tags] and term[:type] == "post_tag"
        if options[:clean_entities]
          tags << clean_entities(term[:name])
        else
          tags << term[:name]
        end
      end
    end
  end

  comments = []

  if options[:comments] and post[:comment_count].to_i > 0
    cquery =
      "SELECT
         comment_ID           AS `id`,
         comment_author       AS `author`,
         comment_author_email AS `author_email`,
         comment_author_url   AS `author_url`,
         comment_date         AS `date`,
         comment_date_gmt     AS `date_gmt`,
         comment_content      AS `content`
       FROM #{px}comments
       WHERE
         comment_post_ID = '#{post[:id]}' AND
         comment_approved != 'spam'"


    db[cquery].each do |comment|

      comcontent = comment[:content].to_s
      if comcontent.respond_to?(:force_encoding)
        comcontent.force_encoding("UTF-8")
      end
      if options[:clean_entities]
        comcontent = clean_entities(comcontent)
      end
      comauthor = comment[:author].to_s
      if options[:clean_entities]
        comauthor = clean_entities(comauthor)
      end

      comments << {
        'id'           => comment[:id].to_i,
        'author'       => comauthor,
        'author_email' => comment[:author_email].to_s,
        'author_url'   => comment[:author_url].to_s,
        'date'         => comment[:date].to_s,
        'date_gmt'     => comment[:date_gmt].to_s,
        'content'      => comcontent,
      }
    end

    comments.sort!{ |a,b| a['id'] <=> b['id'] }
  end

  # Get the relevant fields as a hash, delete empty fields and
  # convert to YAML for the header.
  data = {
    'layout'        => post[:type].to_s,
    'status'        => post[:status].to_s,
    'published'     => (post[:status].to_s == "publish"),
    'title'         => title.to_s,
    'author'        => post[:author].to_s,
    'author_login'  => post[:author_login].to_s,
    'author_email'  => post[:author_email].to_s,
    'author_url'    => post[:author_url].to_s,
    'excerpt'       => excerpt,
    'more_anchor'   => more_anchor,
    'wordpress_id'  => post[:id],
    'wordpress_url' => post[:guid].to_s,
    'date'          => date,
    'categories'    => options[:categories] ? categories : nil,
    'tags'          => options[:tags] ? tags : nil,
    'comments'      => options[:comments] ? comments : nil,
  }.delete_if { |k,v| v.nil? || v == '' }.to_yaml

  # Write out the data and content to file
  File.open("_posts/#{name}", "w") do |f|
    f.puts data
    f.puts "---"
    f.puts content
  end
end

.sluggify(title) ⇒ Object 



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# File 'lib/jekyll/migrators/wordpress.rb', line 283

def self.sluggify( title )
  begin
    require 'unidecode'
    title = title.to_ascii
  rescue LoadError
    STDERR.puts "Could not require 'unidecode'. If your post titles have non-ASCII characters, you could get nicer permalinks by installing unidecode."
  end
  title.downcase.gsub(/[^0-9A-Za-z]+/, " ").strip.gsub(" ", "-")
end