diff --git a/.gitignore b/.gitignore index b420801..682d82b 100644 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,3 @@ _site _drafts +.gist-cache \ No newline at end of file diff --git a/_plugins/gist_tag.rb b/_plugins/gist_tag.rb new file mode 100644 index 0000000..74dd3b3 --- /dev/null +++ b/_plugins/gist_tag.rb @@ -0,0 +1,100 @@ +# A Liquid tag for Jekyll sites that allows embedding Gists and showing code for non-JavaScript enabled browsers and readers. +# by: Brandon Tilly +# Source URL: https://gist.github.com/1027674 +# Post http://brandontilley.com/2011/01/31/gist-tag-for-jekyll.html +# +# Example usage: {% gist 1027674 gist_tag.rb %} //embeds a gist for this plugin + +require 'cgi' +require 'digest/md5' +require 'net/https' +require 'uri' + +module Jekyll + class GistTag < Liquid::Tag + def initialize(tag_name, text, token) + super + @text = text + @cache_disabled = false + @cache_folder = File.expand_path "../.gist-cache", File.dirname(__FILE__) + FileUtils.mkdir_p @cache_folder + end + + def render(context) + if parts = @text.match(/([\d]*) (.*)/) + gist, file = parts[1].strip, parts[2].strip + script_url = script_url_for gist, file + code = get_cached_gist(gist, file) || get_gist_from_web(gist, file) + html_output_for script_url, code + else + "" + end + end + + def html_output_for(script_url, code) + code = CGI.escapeHTML code + <<-HTML +
+
+ HTML + end + + def script_url_for(gist_id, filename) + "https://gist.github.com/#{gist_id}.js?file=#{filename}" + end + + def get_gist_url_for(gist, file) + "https://raw.github.com/gist/#{gist}/#{file}" + end + + def cache(gist, file, data) + cache_file = get_cache_file_for gist, file + File.open(cache_file, "w") do |io| + io.write data + end + end + + def get_cached_gist(gist, file) + return nil if @cache_disabled + cache_file = get_cache_file_for gist, file + File.read cache_file if File.exist? cache_file + end + + def get_cache_file_for(gist, file) + bad_chars = /[^a-zA-Z0-9\-_.]/ + gist = gist.gsub bad_chars, '' + file = file.gsub bad_chars, '' + md5 = Digest::MD5.hexdigest "#{gist}-#{file}" + File.join @cache_folder, "#{gist}-#{file}-#{md5}.cache" + end + + def get_gist_from_web(gist, file) + gist_url = get_gist_url_for gist, file + raw_uri = URI.parse gist_url + proxy = ENV['http_proxy'] + if proxy + proxy_uri = URI.parse(proxy) + https = Net::HTTP::Proxy(proxy_uri.host, proxy_uri.port).new raw_uri.host, raw_uri.port + else + https = Net::HTTP.new raw_uri.host, raw_uri.port + end + https.use_ssl = true + https.verify_mode = OpenSSL::SSL::VERIFY_NONE + request = Net::HTTP::Get.new raw_uri.request_uri + data = https.request request + data = data.body + cache gist, file, data unless @cache_disabled + data + end + end + + class GistTagNoCache < GistTag + def initialize(tag_name, text, token) + super + @cache_disabled = true + end + end +end + +Liquid::Template.register_tag('gist', Jekyll::GistTag) +Liquid::Template.register_tag('gistnocache', Jekyll::GistTagNoCache) diff --git a/stylesheets/screen.css b/stylesheets/screen.css index 04fb9da..c18cb82 100644 --- a/stylesheets/screen.css +++ b/stylesheets/screen.css @@ -127,6 +127,10 @@ article pre { padding: 10px; } +article .gist-file pre { + color: #000; +} + article footer time { display: block; text-align: right;