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Ruby-chan

Fast and easy syntax highlighting for selected languages.

Features

input languages

  • C, C++
  • Clojure (new)
  • CSS
  • Delphi
  • diff
  • ERB
  • Go
  • Groovy
  • HAML (new)
  • HTML
  • Java
  • JavaScript
  • JSON
  • Lua
  • PHP
  • Python
  • Ruby
  • Sass
  • SQL
  • Taskpaper
  • XML
  • YAML

output formats

  • HTML snippet (inline styles)
  • HTML page (CSS classes)
  • Terminal (16 colors)
  • JSON
  • YAML
  • Ruby Array (Tokens)

tools

  • coderay executable
  • LoC counter (beta)

license

basic features

  • fast: 1 MB/s!
  • smart: doesn't choke on crazy code
  • safe: handles bogus input gracefully
  • pure Ruby implementation
  • no dependencies
  • plugin system
  • line numbers
  • nested languages
  • encoding-aware (Ruby 1.9+)
  • extensive test suite

supported platforms

  • MRI 1.8.7
  • MRI 1.9.3
  • MRI 2.0+
  • JRuby 1.7
  • Rubinius 2.0

The latest stable version is 1.1.2. More features are planned for 1.2.

Usage & Live Demo

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# output as HTML div (using inline CSS styles)
CodeRay.scan('puts "Hello, world!"', :ruby).div

# ...with line numbers
CodeRay.scan("5.times do\n  puts 'Hello, world!'\nend", :ruby).div(:line_numbers => :table)

# output as standalone HTML page (using CSS classes)
CodeRay.scan('puts "Hello, world!"', :ruby).page

# keep scanned tokens for later use
tokens = CodeRay.scan('{ "just": "an", "example": 42 }', :json)

# produce a token statistic
tokens.statistic

# count LoC (lines of code)
CodeRay.scan("# comment\nputs 'Hello, world!'", :ruby).loc  # => 1

# produce a HTML div, but with CSS classes
tokens.div(:css => :class)

# highlight a file (to HTML div); guess the file type base on the extension
CodeRay.highlight_file(__FILE__)

# re-using scanner and encoder with Duo
CodeRay::Duo[:ruby, :div].encode('puts "Hello, world!"')

More documentation is also available.