Class: Octopress::Gist::Tag

Inherits:
Liquid::Tag
  • Object
show all
Defined in:
lib/octopress-gist/gist.rb

Direct Known Subclasses

NoCacheTag

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, markup, tokens) ⇒ Tag

Returns a new instance of Tag.



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# File 'lib/octopress-gist/gist.rb', line 5

def initialize(tag_name, markup, tokens)
  super
  @cache_disabled = false
  @tag_name = tag_name
  @markup = markup
end

Instance Method Details

#download_gist(options) ⇒ Object 



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# File 'lib/octopress-gist/gist.rb', line 79

def download_gist(options)
  retried = false
  begin
    response = URI.parse("https://api.github.com/gists/#{options[:gist_id]}").read
    Cache.write_cache(response, options) if options[:cache]
    JSON.parse(response)
  rescue => e
    raise if retried
    retried = true
    retry
  end
rescue => e
  puts "Failed to download Gist: #{gist}.".red
  puts e.extend Error
end

#gist_files(gist, filename = nil) ⇒ Object 



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# File 'lib/octopress-gist/gist.rb', line 63

def gist_files(gist, filename=nil)
  gists = gist['files']
  # Return a single file if specified
  if filename
    if file = gists[filename]
      [file]
    else
      # List file names found in the error message.
      filenames = gists.keys.each { |k| k.to_s }
      raise "File '#{filename}' not found in gist #{gist['id']}. Did you mean '#{filenames.join('\' or \'')}'?"
    end
  else
    gists.values.each{ |v| v }
  end
end

#render(context) ⇒ Object 



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# File 'lib/octopress-gist/gist.rb', line 12

def render(context)
  if CodeHighlighter.clean_markup(@markup) =~ /([\S]*)\s*(\S*)/
    gist_id, filename = $1.strip, $2.strip
    filename = $2.strip == "" ? nil : $2.strip
    options = {
      gist_id: $1.strip,
      cache: !@cache_disabled,
      escape: false
    }
    options = CodeHighlighter.parse_markup(@markup, options)

    if @cache_disabled or ! gist = Cache.read_cache(options)
      gist = download_gist(options)
    end

    options[:url]       ||= gist['html_url']
    options[:link_text] ||= "View Gist"

    output = []
    files = gist_files(gist, filename)
    if files.length > 1 && (options[:start] || options[:end] || options[:range])
      puts "Gist embed warning:"
      puts "  You should probably avoid using start, end or range options on gist embeds with multiple files"
      puts "  Embed files one at a time like {% gist 124151 filename %}"
    end

    files.each do |file|
      opt = {
        title: file['filename'],
        lang: (file['language'] || '').downcase
      }.merge(options)
      begin
        code = CodeHighlighter.select_lines(file['content'], opt)
        code = CodeHighlighter.highlight(code, opt)
        code = "<notextile>#{code}</notextile>" if context.registers[:page]['path'].match(/textile/)
        output << code
      rescue => e
        markup = "{% #{@tag_name} #{@markup.strip} %}"
        CodeHighlighter.highlight_failed(e, "{% #{@tag_name} [gist_id] [file_name] [options...] %}", markup, file['content'])
      end
    end
    output.join "\n"
  else
    error_msg = "Syntax Error: {% #{@tag_name} #{@markup.strip} %}"
    syntax_msg = "Should be: {% #{@tag_name} [gistid] [file_name] [options...] %}"
    puts error_msg.red
    puts syntax_msg
    "<pre>#{error_msg}\n#{syntax_msg}</pre>"
  end
end