408 lines
10 KiB
HTML
408 lines
10 KiB
HTML
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/*
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:Author: David Goodger (goodger@python.org)
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:Id: $Id: html4css1.css 7056 2011-06-17 10:50:48Z milde $
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:Copyright: This stylesheet has been placed in the public domain.
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See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
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<style type="text/css">
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/*
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:Author: Henrik Levkowetz
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:Contact: henrik@levkowetz.com
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:Copyright: This stylesheet has been placed in the public domain.
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Stylesheet for use with Docutils.
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*/
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/* Your customizations go here. For example: */
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.document {
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margin: 0.2em 0.4em;
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width: 50em;
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}
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/* Undo some of the settings above, for fully css compliant browsers. */
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width: auto;
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cite {
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text-align: right;
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}
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</style>
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</head>
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<body>
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<div class="document" id="datatracker-development-notes">
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<h1 class="title">Datatracker development notes</h1>
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<div class="section" id="introduction">
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<h1>Introduction</h1>
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<p>This file should be ordered with the most recent entries at the top.</p>
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<p>Before March 2014, notes on choices made and paths taken, to the extent they
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have been written, has been sent by email and thus don't exist as a collection
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in one place.</p>
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<p>With my recent investigations of code analysis tools, I thought it might be
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a good idea to start collecting these in one place for the project.</p>
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<blockquote>
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<cite>Henrik <henrik@levkowetz.com>, 23 Mar 2014</cite></blockquote>
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</div>
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<div class="section" id="code-analysis-tools">
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<h1>Code Analysis Tools</h1>
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<div class="section" id="pyflakes">
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<h2>PyFlakes</h2>
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<p>Pyflakes has proved robust and easy to work with, and has shown no false
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positives in the messages provided. It has been included in the form of a
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standalone management command, as well as a test suite test.</p>
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</div>
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<div class="section" id="vulture">
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<h2>Vulture</h2>
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<p>Vulture has been a disappointment. Given that the purpose of using it was to
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discover dead code, it was necessary to extend the Vulture class to also parse
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and process variables in template files, as these are points where reference
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back to object methods and object attributes can be made.</p>
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<p>Unfortunately, once this extension was in place, it turned out that the amount
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of remaining false positives was unreasonably large, because Vulture fails to
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understand that the declarative style of Django models (from
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django.models.Model) and admin classes (from django.contrib.admin.ModelAdmin)
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doesn't in fact constitute unused class attributes.</p>
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<p>Finally, it turns out that Vulture is really simpleminded about what
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constitutes usage. It has one set of global lists for used functions, used
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attributes, and used variables; any instance of overlapping function, method,
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variable, or attribute naming across modules will result in one instance of
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use in one module masking lack of usage in all other modules.</p>
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<p>At the moment, it looks like it might be a better way forward to see if
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PyFlakes could be extended with some dead code capability, than to continue to
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pound on what seems to be a broken framework in Vulture.</p>
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</div>
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<div class="section" id="pylint">
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<h2>PyLint</h2>
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<p>PyLint has been excluded from futher consideration because it doesn't only
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parse the code, it also executes it, which comes with both a speed penalty and
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the possibility of triggering unwanted side effects of doing an analysis run.</p>
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</div>
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<div class="section" id="pychecker">
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<h2>PyChecker</h2>
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<p>PyChecker turned out to require much more fiddling than PyFlakes in order to
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do the right thing, but once it was made to run on the datatracker code, and
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ignore the django code, it didn't report anything that PyFlakes hadn't already
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caught.</p>
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<blockquote>
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<cite>Henrik <henrik@levkowetz.com>, 23 Mar 2014</cite></blockquote>
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</div>
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</div>
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</div>
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</body>
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</html>
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