pombredanne / pygments.rb

pygments syntax highlighting in ruby

pygments.rb

A Ruby wrapper for the Python pygments syntax highlighter.

pygments.rb works by talking over a simple pipe to a long-lived Python child process. This library replaces github/albino, as well as a version of pygments.rb that used an embedded Python interpreter.

Each Ruby process that runs has its own 'personal Python'; for example, 4 Unicorn workers will have one Python process each. If a Python process dies, a new one will be spawned on the next pygments.rb request.

system requirements

• Python 2.5, Python 2.6, or Python 2.7. You can always use Python 2.x from a virtualenv if your default Python install is 3.x.

usage

require 'pygments'

Pygments.highlight(File.read(__FILE__), :lexer => 'ruby')

Encoding and other lexer/formatter options can be passed in via an options hash:

Pygments.highlight('code', :options => {:encoding => 'utf-8'})

pygments.rb defaults to using an HTML formatter. To use a formatter other than html, specify it explicitly like so:

Pygments.highlight('code', :formatter => 'bbcode')
Pygments.highlight('code', :formatter => 'terminal')

To generate CSS for HTML formatted code, use the #css method:

Pygments.css
Pygments.css('.highlight')

To use a specific pygments style, pass the :style option to the #css method:

Pygments.css(:style => "monokai")

Other Pygments high-level API methods are also available. These methods return arrays detailing all the available lexers, formatters, and styles.

Pygments.lexers
Pygments.formatters
Pygments.styles

To use a custom pygments installation, specify the path to Pygments#start:

Pygments.start("/path/to/pygments")

If you'd like logging, set the environmental variable MENTOS_LOG to a file path for your logfile.

By default pygments.rb will timeout calls to pygments that take over 8 seconds. You can change this by setting the environmental variable MENTOS_TIMEOUT to a different positive integer value.

benchmarks

$ ruby bench.rb 50
   Benchmarking....
   Size: 698 bytes
   Iterations: 50
                                                  user     system      total        real
   pygments popen                                0.010000   0.010000   0.020000 (  0.460370)
   pygments popen (process already started)      0.010000   0.000000   0.010000 (  0.272975)
   pygments popen (process already started 2)    0.000000   0.000000   0.000000 (  0.273589)

$ ruby bench.rb 10
   Benchmarking....
   Size: 15523 bytes
   Iterations: 10
                                                  user     system      total        real
   pygments popen                               0.000000   0.000000   0.000000 (  0.819419)
   pygments popen (process already started)     0.010000   0.000000   0.010000 (  0.676515)
   pygments popen (process already started 2)   0.000000   0.010000   0.010000 (  0.674189)

license

The MIT License (MIT)

Copyright (c) Ted Nyman and Aman Gupta, 2012-2013

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.