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<h1 class="post-title">first week working on distutils2</h1>
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<span class="post-date">
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04 juin 2010, dans <a class="no-color" href="category/technologie.html">Technologie</a>
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<ul>
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<li><a href="#first-week-working-on-distutils2">first week working on distutils2</a><ul>
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<li><a href="#a-pypi-server-mock">A PyPI Server mock</a></li>
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<li><a href="#the-pypi-simple-api">The PyPI Simple API</a></li>
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<li><a href="#the-work-to-come">The work to come</a></li>
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<h1>🌟</h1>
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<p>As I've been working on <a href="http://hg.python.org/distutils2/">Distutils2</a>
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during the past week, taking part of the
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<a href="http://code.google.com/intl/fr/soc/">GSOC</a> program, here is a short
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summary of what I've done so far.</p>
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<p>As my courses are not over yet, I've not worked as much as I wanted, and
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this will continues until the end of June. My main tasks are about
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making installation and uninstallation commands, to have a simple way to
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install distributions via
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<a href="http://hg.python.org/distutils2/">Distutils2</a>.</p>
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<p>To do this, we need to rely on informations provided by the Python
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Package Index (<a href="http://pypi.python.org/">PyPI</a>), and there is at least
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two ways to retreive informations from here: XML-RPC and the "simple"
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API.</p>
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<p>So, I've been working on porting some
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<a href="http://bitbucket.org/tarek/distribute/">Distribute</a> related stuff to
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<a href="http://hg.python.org/distutils2/">Distutils2</a>, cutting off all non
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distutils' things, as we do not want to depend from Distribute's
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internals. My main work has been about reading the whole code, writing
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tests about this and making those tests possible.</p>
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<p>In fact, there was a need of a pypi mocked server, and, after reading
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and introducing myself to the distutils behaviors and code, I've taken
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some time to improve the work <a href="http://bitbucket.org/konrad">Konrad</a>
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makes about this mock.</p>
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<h2 id="a-pypi-server-mock">A PyPI Server mock</h2>
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<p>The mock is embeded in a thread, to make it available during the tests,
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in a non blocking way. We first used <a href="http://wsgi.org">WSGI</a> and
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<a href="http://docs.python.org/library/wsgiref.html">wsgiref</a> in order control
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what to serve, and to log the requests made to the server, but finally
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realised that <a href="http://docs.python.org/library/wsgiref.html">wsgiref</a> is
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not python 2.4 compatible (and we <em>need</em> to be python 2.4 compatible in
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Distutils2).</p>
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<p>So, we switched to
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<a href="http://docs.python.org/library/basehttpserver.html">BaseHTTPServer</a> and
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<a href="http://docs.python.org/library/simplehttpserver.html">SimpleHTTPServer</a>,
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and updated our tests accordingly. It's been an opportunity to realize
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that <a href="http://wsgi.org">WSGI</a> has been a great step forward for making
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HTTP servers, and expose a really simplest way to discuss with HTTP !</p>
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<p>You can find <a href="http://bitbucket.org/ametaireau/distutils2/changesets">the modifications I
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made</a>, and the
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<a href="http://bitbucket.org/ametaireau/distutils2/src/tip/docs/source/test_framework.rst">related
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docs</a>
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about this on <a href="http://bitbucket.org/ametaireau/distutils2/">my bitbucket distutils2
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clone</a>.</p>
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<h2 id="the-pypi-simple-api">The PyPI Simple API</h2>
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<p>So, back to the main problematic: make a python library to access and
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request information stored on PyPI, via the simple API. As I said, I've
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just grabbed the work made from
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<a href="http://bitbucket.org/tarek/distribute/">Distribute</a>, and played a bit
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with, in order to view what are the different use cases, and started to
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write the related tests.</p>
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<h2 id="the-work-to-come">The work to come</h2>
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<p>So, once all use cases covered with tests, I'll rewrite a bit the
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grabbed code, and do some software design work (to not expose all things
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as privates methods, have a clear API, and other things like this), then
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update the tests accordingly and write a documentation to make this
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clear.</p>
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<p>Next step is to a little client, as I've <a href="http://github.com/ametaireau/pypiclient">already started
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here</a> I'll take you updated !</p>
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