1CodeHilite 2========== 3 4Summary 5------- 6 7The CodeHilite Extension adds code/syntax highlighting to standard 8Python-Markdown code blocks using [Pygments][]. 9 10[Python-Markdown]: http://www.freewisdom.org/projects/python-markdown/ 11[Pygments]: http://pygments.org/ 12 13This extension is included in the Markdown library. 14 15Setup 16----- 17 18You will also need to [download][dl] and install the Pygments package on your 19`PYTHONPATH`. You will need to determine the appropriate CSS classes and create 20appropriate rules for them, which are either defined in or linked from the 21header of your HTML templates. See the excellent [documentation][] for more 22details. If no language is defined, Pygments will attempt to guess the 23language. When that fails, the code block will display as un-highlighted code. 24 25[dl]: http://pygments.org/download/ 26[documentation]: http://pygments.org/docs 27 28**Note:** The css and/or javascript is not included as part of this extension 29but shall always be provided by the end user. 30 31Syntax 32------ 33 34The CodeHilite Extension follows the same [syntax][] as regular Markdown code 35blocks, with one exception. The hiliter needs to know what language to use for 36the code block. There are three ways to tell the hiliter what language the code 37block contains and each one has a different result. 38 39[syntax]: http://daringfireball.net/projects/markdown/syntax#precode 40 41###SheBang (with path) 42 43If the first line of the codeblock contains a shebang, the language is derived 44from that and line numbers are used. 45 46 #!/usr/bin/python 47 # Code goes here ... 48 49Will result in: 50 51 #!/usr/bin/python 52 # Code goes here ... 53 54 55###SheBang (no path) 56 57If the first line contains a shebang, but the shebang line does not contain a 58path (a single `/` or even a space), then that line is removed from the code 59block before processing. Line numbers are used. 60 61 #!python 62 # Code goes here ... 63 64Will result in: 65 66 # Code goes here ... 67 68####Colons 69 70If the first line begins with three or more colons, the text following the 71colons identifies the language. The first line is removed from the code block 72before processing and line numbers are not used. 73 74 :::python 75 # Code goes here ... 76 77Will result in: 78 79 # Code goes here ... 80 81###When No Language is Defined 82 83CodeHilite is completely backward compatible so that if a code block is 84encountered that does not define a language, the block is simple wrapped in 85`<pre>` tags and output. Note: one exception would be that the Pygments 86highlighting engine will try to guess the language. Upon failure, the same 87behavior will happen as described here. 88 89 # Code goes here ... 90 91Will result in: 92 93 # Code goes here ... 94 95Lets see the source for that: 96 97 <div class="codehilite" ><pre><code># Code goes here ... 98 </code></pre></div> 99 100Usage 101----- 102 103From the Python interpreter: 104 105 >>> html = markdown.markdown(text, ['codehilite']) 106 107If you want every code block to have line numbers, even when using colons 108(`:::`) for language identification, the setting `force_linenos` is available 109to do so. 110 111 >>> html = markdown.markdown(text, 112 ... ['codehilite(force_linenos=True)'] 113 ... ) 114