Jekyll for GitHub Pages can't find rouge on Windows - windows

Question

I just installed Jekyll on Windows and I'm trying to make the syntax highlight work with rouge.
I have set highlighter: rouge on _config.yml.
In the file _posts\2015-08-13-my-first-post.md I got:
{% highlight javascript linenos %}
var s = "JavaScript syntax highlighting";
alert(s);
{% endhighlight %}
When I run bundle exec jekyll serve it outputs:
C:\Users\Fred\Documents\Projects\GithubPage>bundle exec jekyll serve
Configuration file: C:/Users/Fred/Documents/Projects/GithubPage/_config.yml
Source: C:/Users/Fred/Documents/Projects/GithubPage
Destination: C:/Users/Fred/Documents/Projects/GithubPage/_site
Generating...
Liquid Exception: cannot load such file -- rouge in _posts/2015-08-13-my-first-post.md
C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/tags/highlight.rb:103:in `require': cannot load such file -- rouge (LoadError)
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/tags/highlight.rb:103:in `render_rouge'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/tags/highlight.rb:54:in `render'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/liquid-2.6.3/lib/liquid/block.rb:109:in `block in render_all'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/liquid-2.6.3/lib/liquid/block.rb:96:in `each'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/liquid-2.6.3/lib/liquid/block.rb:96:in `render_all'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/liquid-2.6.3/lib/liquid/block.rb:82:in `render'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/liquid-2.6.3/lib/liquid/template.rb:128:in `render'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/liquid-2.6.3/lib/liquid/template.rb:138:in `render!'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/convertible.rb:106:in `render_liquid'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/convertible.rb:233:in `do_layout'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/post.rb:261:in `render'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:298:in `block in render'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:297:in `each'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:297:in `render'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:51:in `process'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/command.rb:28:in `process_site'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:56:in `build'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:34:in `process'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/lib/jekyll/commands/serve.rb:26:in `block (2 levels) in init_with_program'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `call'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `block in execute'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `each'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `execute'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:in `go'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mercenary-0.3.5/lib/mercenary.rb:19:in `program'
from C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/jekyll-2.5.3/bin/jekyll:20:in `<top (required)>'
from C:/Ruby21-x64/bin/jekyll:23:in `load'
from C:/Ruby21-x64/bin/jekyll:23:in `<main>'
The gems that I have installed are:
C:\Users\Fred\Documents\Projects\GithubPage>gem list --local
*** LOCAL GEMS ***
bigdecimal (1.2.4)
blankslate (2.1.2.4)
bundler (1.10.6)
celluloid (0.16.1)
classifier-reborn (2.0.3)
coffee-script (2.4.1)
coffee-script-source (1.9.1.1)
colorator (0.1)
execjs (2.5.2)
fast-stemmer (1.0.2)
ffi (1.9.10 x64-mingw32)
hitimes (1.2.2)
io-console (0.4.3)
jekyll (2.5.3)
jekyll-coffeescript (1.0.1)
jekyll-gist (1.3.0)
jekyll-paginate (1.1.0)
jekyll-sass-converter (1.3.0)
jekyll-watch (1.2.1)
json (1.8.1)
kramdown (1.8.0)
liquid (2.6.3)
listen (2.10.1)
mercenary (0.3.5)
minitest (4.7.5)
parslet (1.5.0)
posix-spawn (0.3.11)
psych (2.0.5)
pygments.rb (0.6.3)
rake (10.1.0)
rb-fsevent (0.9.5)
rb-inotify (0.9.5)
rdoc (4.1.0)
redcarpet (3.3.2)
rouge (1.9.1)
safe_yaml (1.0.4)
sass (3.4.16)
test-unit (2.1.6.0)
timers (4.0.1)
toml (0.1.2)
yajl-ruby (1.2.1)

Answer 1

I had the same problem. I added the line
gem 'rouge'
to my Gemfile, then ran
bundle install
Then I could run
bundle exec jekyll build
without the error.

Answer 2

Github Pages work only with these plugins for security reasons.
Have you installed rouge in your Jekyll directory?
Here is a guide for syntax highlighting in Jekyll and installing Jekyll on a Windows machine that might help you.