108 lines
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108 lines
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<a href="../../../../Scratch/en/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/">Anglais</a>
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<h1>Utilisation de git pour calculer les mtimes</h1>
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<p>Vous pouvez remarquer qu’à la fin de chaque page je donne une date de dernière modification. Précédemment cette date était calculée en utilisant la date du fichier. Mais il arrive fréquemment que je fasse un <code>touch</code> d’un fichier pour engendrer tout le site de nouveau. Donc la date n’est pas nécessairement la <em>vraie</em> de modification du contenue.</p>
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<p>J’utilise <a href="http://git-scm.org">git</a> pour <em>versionner</em> mon site web. Et cet outil me permet de récupérer la dernière date de <em>vraie</em> modification d’un fichier. Voici comment je m’y prend avec <a href="http://nanoc.stoneship.org">nanoc</a> :</p>
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<div class="sourceCode" id="cb1"><pre class="sourceCode ruby"><code class="sourceCode ruby"><a class="sourceLine" id="cb1-1" title="1"><span class="kw">def</span> gitmtime</a>
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<a class="sourceLine" id="cb1-2" title="2"> filepath=<span class="ot">@item</span>.path.sub(<span class="st">'/Scratch/'</span>,<span class="st">'content/html/'</span>).sub(<span class="ot">/\/$/</span>,<span class="st">''</span>)</a>
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<a class="sourceLine" id="cb1-3" title="3"> ext=<span class="ot">%{</span><span class="st">.</span><span class="ot">#{@item</span>[<span class="st">:extension</span>]<span class="ot">}}</span></a>
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<a class="sourceLine" id="cb1-4" title="4"> filepath<<=ext</a>
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<a class="sourceLine" id="cb1-5" title="5"> <span class="kw">if</span> <span class="kw">not</span> <span class="dt">FileTest</span>.exists?(filepath)</a>
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<a class="sourceLine" id="cb1-6" title="6"> filepath.sub!(ext,<span class="ot">%{#{@item</span>.raw_filename<span class="ot">}#{</span>ext<span class="ot">}}</span>)</a>
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<a class="sourceLine" id="cb1-7" title="7"> <span class="kw">end</span></a>
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<a class="sourceLine" id="cb1-8" title="8"> str=<span class="st">`git log -1 --format='%ci' -- </span><span class="ot">#{</span>filepath<span class="ot">}</span><span class="st">`</span></a>
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<a class="sourceLine" id="cb1-9" title="9"> <span class="kw">if</span> str.nil? <span class="kw">or</span> str.empty?</a>
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<a class="sourceLine" id="cb1-10" title="10"> <span class="kw">return</span> <span class="dt">Time</span>.now</a>
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<a class="sourceLine" id="cb1-11" title="11"> <span class="kw">else</span></a>
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<a class="sourceLine" id="cb1-12" title="12"> <span class="kw">return</span> <span class="dt">DateTime</span>.parse( str )</a>
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<a class="sourceLine" id="cb1-13" title="13"> <span class="kw">end</span></a>
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<a class="sourceLine" id="cb1-14" title="14"><span class="kw">end</span></a></code></pre></div>
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<p>Bien entendu je sais que c’est très lent et absolument pas optimisé. Mais ça fonctionne comme prévu. Maintenant la date que vous voyez en bas de la page correspond exactement à la dernière date de modification de son contenu.</p>
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<p><em>Mise à jour</em>: Je tiens à remercier Eric Sunshine et Kris pour leurs conseils sur ce problème.</p>
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Published on 2010-09-02
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