Add local file support.

Example of absolute path to local file.
```html:/home```

Example of relative path to local file.
```html:home```

1.8.7 string fix. 's'[0..0] instead of 's'[0]

Fix regex.

Add absolute and relative tests.

lib/gollum/frontend/app.rb

@@ -89,12 +89,6 @@ module Precious
       redirect File.join(settings.wiki_options[:base_path].to_s, 'Home')
     end
 
-    # Removes all slashes from the start of string.
-    def clean_url url
-      return url if url.nil?
-      url.gsub('%2F','/').gsub(/^\/+/,'')
-    end
-
     # path is set to name if path is nil.
     #   if path is 'a/b' and a and b are dirs, then
     #   path must have a trailing slash 'a/b/' or

lib/gollum/frontend/helpers.rb

@@ -17,5 +17,11 @@ module Precious
     def sanitize_empty_params(param)
       [nil,''].include?(param) ? nil : CGI.unescape(param)
     end
+
+    # Remove all slashes from the start of string.
+    def clean_url url
+      return url if url.nil?
+      url.gsub('%2F','/').gsub(/^\/+/,'')
+    end
   end
 end

lib/gollum/gitcode.rb

@@ -7,6 +7,7 @@ module Gollum
   class Gitcode
     def initialize path
       raise(ArgumentError, 'path is nil or empty') if path.nil? or path.empty?
+
       @uri = URI::HTTP.build({ 
         :path   => self.unchomp(path), 
         :host   => 'raw.github.com', 

lib/gollum/markup.rb

@@ -2,7 +2,9 @@ require 'digest/sha1'
 require 'cgi'
 require 'pygments'
 require 'base64'
-require File.expand_path( '../gitcode', __FILE__ )
+
+require File.expand_path '../frontend/helpers', __FILE__
+require File.expand_path '../gitcode', __FILE__
 
 # initialize Pygments
 Pygments.start
@@ -10,6 +12,8 @@ Pygments.start
 module Gollum
 
   class Markup
+    include Precious::Helpers
+
     attr_accessor :toc
     attr_reader   :metadata
 
@@ -459,9 +463,23 @@ module Gollum
     #########################################################################
 
     def extract_gitcode data
-      data.gsub /^[ \t]*``` ?(\w+):(.+)```$/ do
-        gc = Gollum::Gitcode.new $2
-        "```#{$1}\n#{gc.contents}\n```"
+      data.gsub /^[ \t]*``` ?([^:\n\r]+):([^`\n\r]+)```/ do
+        contents = ''
+        # Use empty string if $2 is nil.
+        uri = $2 || ''
+        # Detect local file.
+        if uri[0..6] != 'github/'
+          if uri[0..0] != '/' # relative file
+            contents = @wiki.page(uri).formatted_data
+          else # use full path
+            contents = @wiki.paged( extract_name( clean_url( uri ) ),
+             '/' + clean_url( extract_path( uri ) ) ).formatted_data
+          end
+        else
+          contents = Gollum::Gitcode.new(uri).contents
+        end
+
+        "```#{$1}\n#{contents}\n```\n"
       end
     end
 

test/test_markup.rb

@@ -495,6 +495,35 @@ np.array([[2,2],[1,3]],np.float)
     assert_match /\(\[\[/, rendered, "#{markup_class} parses out wiki links\n#{rendered}"
   end
 
+  test "embed code is escaped" do
+    @wiki.write_page("script", :markdown, "a <script></script> b", commit_details)
+    @wiki.write_page("page", :markdown, "```html:script```", commit_details)
+
+    output_script = @wiki.page("script").formatted_data
+    output_page = @wiki.page("page").formatted_data
+
+    assert_equal %Q{<p>a  b</p>}, output_script
+    assert_equal %Q{<div class=\"highlight\">\n<pre><span class=\"nt\">&lt;p&gt;</span>a  b<span class=\"nt\">&lt;/p&gt;</span>\n</pre>\n</div>\n}, output_page
+  end
+
+  test "embed code page absolute link" do
+    @wiki.write_page("base", :markdown, "a\n!base\b", commit_details)
+    @wiki.write_page("a", :markdown, "a\n```html:/base```\b", commit_details)
+
+    page = @wiki.page("a")
+    output = page.formatted_data
+    assert_equal %Q{<p>a\n</p><div class=\"highlight\">\n<pre><span class=\"nt\">&lt;p&gt;</span>a\n!base<span class=\"nt\">&lt;/p&gt;</span>\n</pre>\n</div>\n\n}, output
+  end
+
+  test "embed code page relative link" do
+    @wiki.write_page("base", :markdown, "a\n!rel\b", commit_details)
+    @wiki.write_page("a", :markdown, "a\n```html:base```\b", commit_details)
+
+    page = @wiki.page("a")
+    output = page.formatted_data
+    assert_equal %Q{<p>a\n</p><div class=\"highlight\">\n<pre><span class=\"nt\">&lt;p&gt;</span>a\n!rel<span class=\"nt\">&lt;/p&gt;</span>\n</pre>\n</div>\n\n}, output
+  end
+
   #########################################################################
   #
   # Web Sequence Diagrams