update albino to 1.2.3, handle bad code blocks gracefully

gollum.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency('grit', "~> 2.3")
   s.add_dependency('github-markup', [">= 0.4.0", "< 1.0.0"])
-  s.add_dependency('albino', "~> 1.0")
+  s.add_dependency('albino', "~> 1.2.3")
   s.add_dependency('sinatra', "~> 1.0")
   s.add_dependency('mustache', [">= 0.11.2", "< 1.0.0"])
   s.add_dependency('sanitize', "~> 1.1")

lib/gollum/albino.rb

@@ -1,30 +1,12 @@
 require 'albino'
 
 class Gollum::Albino < Albino
-  def self.bin
-    Albino.bin
-  end
-
-  def bin
-    Albino.bin
-  end
+  self.bin              = ::Albino.bin
+  self.default_encoding = ::Albino.default_encoding
 
   def colorize(options = {})
     html = super.to_s
     html.sub!(%r{</pre></div>\Z}, "</pre>\n</div>")
     html
   end
-
-  # Hotfix for vulnerable versions of Albino
-  if !instance_methods.include?('shell_escape')
-    def convert_options(options = {})
-      @options.merge(options).inject('') do |string, (flag, value)|
-        string + " -#{flag} #{shell_escape value}"
-      end
-    end
-
-    def shell_escape(str)
-      str.to_s.gsub("'", "\\\\'").gsub(";", '\\;')
-    end
-  end
 end

lib/gollum/markup.rb

@@ -380,14 +380,18 @@ module Gollum
       @codemap.each do |id, spec|
         formatted = spec[:output] || begin
           code = spec[:code]
+          lang = spec[:lang]
+
           if code.lines.all? { |line| line =~ /\A\r?\n\Z/ || line =~ /^(  |\t)/ }
             code.gsub!(/^(  |\t)/m, '')
           end
-          formatted = if lang = spec[:lang]
-            Gollum::Albino.new(code, lang).colorize
-          else
-            "<pre><code>#{CGI.escapeHTML(code)}</code></pre>"
+
+          formatted = begin
+            lang && Gollum::Albino.colorize(code, lang)
+          rescue ::Albino::ShellArgumentError, ::Albino::Process::TimeoutExceeded, 
+              ::Albino::Process::MaximumOutputExceeded
           end
+          formatted ||= "<pre><code>#{CGI.escapeHTML(code)}</code></pre>"
           update_cache(:code, id, formatted)
           formatted
         end

test/test_markup.rb

@@ -343,7 +343,7 @@ context "Markup" do
     content = "a\n\n```ruby\nx = 1\n```\n\nb"
     output = "<p>a</p>\n\n<div class=\"highlight\"><pre>" +
              "<span class=\"n\">x</span> <span class=\"o\">=</span> " +
-             "<span class=\"mi\">1</span>\n</pre>\n</div>\n\n<p>b</p>"
+             "<span class=\"mi\">1</span>\n</pre>\n</div>\n\n\n<p>b</p>"
 
     index = @wiki.repo.index
     index.add("Bilbo-Baggins.md", content)
@@ -358,7 +358,7 @@ context "Markup" do
     content = "a\r\n\r\n```ruby\r\nx = 1\r\n```\r\n\r\nb"
     output = "<p>a</p>\n\n<div class=\"highlight\"><pre>" +
              "<span class=\"n\">x</span> <span class=\"o\">=</span> " +
-             "<span class=\"mi\">1</span>\n</pre>\n</div>\n\n<p>b</p>"
+             "<span class=\"mi\">1</span>\n</pre>\n</div>\n\n\n<p>b</p>"
 
     index = @wiki.repo.index
     index.add("Bilbo-Baggins.md", content)
@@ -374,7 +374,7 @@ context "Markup" do
     output = "<p>a</p>\n\n<div class=\"highlight\"><pre><span class=\"n\">" +
              "x</span> <span class=\"o\">=</span> <span class=\"mi\">1" +
              "</span>\n\n<span class=\"n\">y</span> <span class=\"o\">=" +
-             "</span> <span class=\"mi\">2</span>\n</pre>\n</div>\n\n<p>b</p>"
+             "</span> <span class=\"mi\">2</span>\n</pre>\n</div>\n\n\n<p>b</p>"
     compare(content, output)
   end
 
@@ -383,13 +383,13 @@ context "Markup" do
     output = "<p>a</p>\n\n<div class=\"highlight\"><pre><span class=\"n\">" +
              "x</span> <span class=\"o\">=</span> <span class=\"mi\">1" +
              "</span>\n\n<span class=\"n\">y</span> <span class=\"o\">=" +
-             "</span> <span class=\"mi\">2</span>\n</pre>\n</div>\n\n<p>b</p>"
+             "</span> <span class=\"mi\">2</span>\n</pre>\n</div>\n\n\n<p>b</p>"
     compare(content, output)
   end
 
   test "code block with invalid lang" do
     content = "a\n\n``` ls -al;\n\tbooya\n\tboom\n```\n\nb"
-    output = "<p>a</p>\n\n\n\n<p>b</p>"
+    output  = "<p>a</p>\n\n<pre><code>booya\nboom</code></pre>\n\n<p>b</p>"
     compare(content, output)
   end