gistfile1.rb

syntax :html do
  # apply this syntax to .html and .htm files
  extension "html", "htm"
  
  # color an entire tag green
  green :begin => "<", :end => ">" do
    #apply the following rules only to the stuff between the <>
    
    # color the tag content yellow (so the <> are green)
    yellow /.*/
    
    # color div/span tag names as blue, all others will be yellow
    blue /div|span/
    
    # color stray <> as red
    red "<", ">"
  end
end

syntax :ruby do
  # apply this syntax to files that have the .rb extension or start with #!/usr/bin/ruby
  extension ".rb"
  matches{|content| content.match(/^#!.*ruby/)}
end

syntax :erb do
  extension ".erb", ".rhtml"
  
  # .erb files will first try to process erb rules.  if none match, then it will assume the text is html
  default :html
  
  # content between <% %> will be treated as ruby, but the <% %> will not be colored
  match :begin => "<%", :end => "%>", :is => :ruby
  
  # content between <%= %> will be colored green and treated as ruby
  green :begin => "<%=", :end => "%>", :is => :ruby
end