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<p class="MsoNormal"><span style="font-size:11.0pt">FYI if you see the following error in your job logs, you have the new setuptools to thank:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AttributeError: Distribution instance has no attribute 'install_requires'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’ve registered <a href="https://github.com/pypa/setuptools/issues/1086">
https://github.com/pypa/setuptools/issues/1086</a> to track the issue, and very quickly got a response and there’s a PR up to resolve it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">In our case we saw this when downgrading setuptools to our known, good working version.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’d like to suggest that we include setuptools, pip, wheel and other core packages in the upper constraints management process and that all the images built for jobs make use of it. The number of times that
a new release of pip/setuptools has completely ground development to a halt for a day, sometimes more, is a little too frequent for my liking.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">IIRC we’d need to just change the u-c generation output from ‘pip freeze’ to ‘pip freeze –all’ for the output to include the versions for pip, setuptools and wheel. Then, with that spec, pip can be installed
using u-c like so:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">CURL_CMD="curl --silent --show-error --retry 5"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">OUTPUT_FILE="get-pip.py"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">${CURL_CMD} https://bootstrap.pypa.io/get-pip.py > ${OUTPUT_FILE} ||\<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> ${CURL_CMD} https://raw.githubusercontent.com/pypa/get-pip/master/get-pip.py > ${OUTPUT_FILE}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">python ${OUTPUT_FILE} pip setuptools wheel -c upper-constraints.txt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">That will ensure a consistent, known good version set is installed and will also cater for the situation where the primary URL for get-pip.py is down (as happens sometimes).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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