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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/126345/">https://git.reviewboard.kde.org/r/126345/</a>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Seems sensible to me. Are there any potential Python2 vs Python3 issues?</p></pre>
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<p>- Alex Merry</p>
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<p>On December 14th, 2015, 4:48 p.m. UTC, Raphael Kubo da Costa wrote:</p>
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<div>Review request for Build System, kdelibs and Alex Merry.</div>
<div>By Raphael Kubo da Costa.</div>
<p style="color: grey;"><i>Updated Dec. 14, 2015, 4:48 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kdelibs
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">The <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">PYTHON_INSTALL()</code> macro is a wrapper around the <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">py_compile</code> Python module that also installs the byte-code (.pyc) file it generates.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">However, when a .py file is passed to <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">py_compile</code> without any additional arguments, its full path is recorded in the .pyc file. This is problematic, as most distributions install all files into a build root instead of simply copying files to <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">/</code> as part of the packaging process. In this case, the generated .pyc file will have something like
/wrkdir/buildroot/usr/lib/python2.7/site-packages/Foo/my_module.py
in it. Not only does this show up in exception tracebacks, but if the user later invokes <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">my_module.py</code> and has write access to <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">my_module</code>'s directory, <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">my_module.pyc</code> will be rewritten with the right path to <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">my_module.py</code> (without the build root). This can lead to uninstallation errors if the package management system checks each file before removal, for example.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Fix it by rewritting the <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">PythonCompile.py</code> script so that it takes a <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">--destination-dir</code> argument that we use to pass the full path to <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">my_module.py</code> instead of letting it be (wrongly) deduced.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Fedora has packaging macros that will regenerate .pyc and .pyo files with the right paths as part of the build, so it is not affected. Debian disables this macro in pykde4, FreeBSD and openSUSE contain wrong paths in its .pyc files. With this patch, I was able to verify with <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">hexdump</code> that the right path is present in the .pyc files installed by pykde4.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>cmake/modules/PythonCompile.py <span style="color: grey">(156fea2)</span></li>
<li>cmake/modules/PythonMacros.cmake <span style="color: grey">(6a82d88)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/126345/diff/" style="margin-left: 3em;">View Diff</a></p>
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