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<h1>A more convenient diff</h1>
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<p>Diff is a very useful tool. But it is not so easy to read for us, simple mortal.</p>
<p>This is why, when you use <code>git</code> it will use a better formatting and colorize it.</p>
<p>Here is the script I use when I want to use human readable <code>diff</code> à la git.</p>
<div class="sourceCode" id="cb1"><pre class="sourceCode zsh"><code class="sourceCode zsh"><a class="sourceLine" id="cb1-1" title="1"><span class="co">#!/usr/bin/env zsh</span></a>
<a class="sourceLine" id="cb1-2" title="2"></a>
<a class="sourceLine" id="cb1-3" title="3"><span class="co"># Load colors helpers</span></a>
<a class="sourceLine" id="cb1-4" title="4"><span class="kw">autoload</span> -U colors <span class="kw">&amp;&amp;</span> colors</a>
<a class="sourceLine" id="cb1-5" title="5"></a>
<a class="sourceLine" id="cb1-6" title="6"><span class="kw">function</span><span class="fu"> colorize_diff</span> <span class="kw">{</span></a>
<a class="sourceLine" id="cb1-7" title="7"> <span class="kw">while</span> <span class="kw">read</span> <span class="ot">line</span>; <span class="kw">do</span></a>
<a class="sourceLine" id="cb1-8" title="8"> <span class="kw">case</span> <span class="ot">${line[0]}</span><span class="kw"> in</span></a>
<a class="sourceLine" id="cb1-9" title="9"> +<span class="kw">)</span> <span class="kw">print</span> -n <span class="ot">$fg[green]</span><span class="kw">;;</span></a>
<a class="sourceLine" id="cb1-10" title="10"> -<span class="kw">)</span> <span class="kw">print</span> -n <span class="ot">$fg[red]</span><span class="kw">;;</span></a>
<a class="sourceLine" id="cb1-11" title="11"> @<span class="kw">)</span> <span class="co"># Display in cyan the @@ positions @@</span></a>
<a class="sourceLine" id="cb1-12" title="12"> <span class="kw">if [[</span> <span class="ot">${line[1]}</span> <span class="ot">=</span> <span class="st">'@'</span><span class="kw"> ]]</span>; <span class="kw">then</span></a>
<a class="sourceLine" id="cb1-13" title="13"> <span class="ot">line=$(</span><span class="kw">print</span> <span class="ot">$line</span> <span class="kw">|</span> <span class="kw">perl</span> -pe <span class="st">'s#(\@\@[^\@]*\@\@)(.*)$#'</span><span class="ot">$fg[cyan]</span><span class="st">'$1'</span><span class="ot">$reset_color</span><span class="st">'$2#'</span><span class="ot">)</span></a>
<a class="sourceLine" id="cb1-14" title="14"> <span class="kw">fi;;</span></a>
<a class="sourceLine" id="cb1-15" title="15"></a>
<a class="sourceLine" id="cb1-16" title="16"> <span class="kw">esac</span></a>
<a class="sourceLine" id="cb1-17" title="17"> <span class="kw">print</span> -- <span class="ot">$line</span></a>
<a class="sourceLine" id="cb1-18" title="18"> <span class="kw">print</span> -n <span class="ot">$reset_color</span></a>
<a class="sourceLine" id="cb1-19" title="19"> <span class="kw">done</span></a>
<a class="sourceLine" id="cb1-20" title="20"><span class="kw">}</span></a>
<a class="sourceLine" id="cb1-21" title="21"></a>
<a class="sourceLine" id="cb1-22" title="22"><span class="kw">diff</span> -u <span class="ot">$*</span> <span class="kw">|</span> colorize_diff</a></code></pre></div>
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Published on 2011-08-17
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