Source Code Blocks
Developers are accustomed to seeing source code colorized to emphasize the code’s structure (i.e., keywords, types, delimiters, etc.). This technique is known as syntax highlighting. Since this technique is so prevalent, Asciidoctor integrates with a number of libraries to syntax highlight the source code blocks in your document. The list of integrated libraries includes Rouge, CodeRay, Pygments, and highlight.js.
Example 1 shows a listing block with the
source style and language
ruby applied to its content, hence a source block.
[source,ruby] ---- require 'sinatra' get '/hi' do "Hello World!" end ----
The result of Example 1 is rendered below.
require 'sinatra' get '/hi' do "Hello World!" end
source block is most often used to designate a block with source code of a particular language, the
source style itself is optional.
The mere presence of the language on a listing block automatically promotes it to a source block.
Example 2 shows a listing block implied to be a source block because a language is specified.
[,ruby] ---- require 'sinatra' get '/hi' do "Hello World!" end ----
This shorthand also works if the
source-language attribute is set on the document, which serves as the default language for source blocks.
source-language attribute is set on the doucment and you want to make a regular listing block, add the
listing style to the block.
You can use an include directive to insert source code into an AsciiDoc document directly from a file.
[source,ruby] ---- include::app.rb ----
If you specify custom substitutions on the source block using the