How to use Jenkins for python development

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At Wallix, we are mainly developing under 2 main environments C/C++ and python. In this article, we are going to cover how we have used Jenkins in our python development process.

We have chosen Jenkins as our continuous integration platform because it supports a wide range of external tools. So far, we have integrated the following features and tools:

  • integration with our version control system subversion and git to launch periodic build and checks when modifications arise;
  • unit and integration test runners;
  • sloccount to have metrics about lines of codes;
  • pylint and pyflakes for python code analysis;
  • clonedigger for duplicate code detection;
  • integration with our ticket management system redmine.

Plugins

To be able to integrate these tools, you need to install these extra plugins:

Then you have to configure these plugins in your project settings page. We are going to give advices for each plugins in the following sections.

SLOCCount

You need sloccount installed in your path of course and then you have to add the following shell script step in your build process:

sloccount --duplicates --wide --details . | fgrep -v .svn > sloccount.sc || :

This will create the sloccount.sc file in your workspace during the build process. You have to active the Publish SLOCCount analysis results checkbox and configure the file name in the SLOCCount reports entry field.

Unit tests

We use nosetest to drive our unit tests. You need to add the following shell script test in your build process:

find . -name test*.py|xargs nosetests --with-xunit --verbose || :

and then provide nosetests.xml as the name of the JUnit file.

Pyflakes

Pyflakes is integrated through the Warnings plugin. You have to add the following shell build step:

find . -name *.py|egrep -v '^./tests/'|xargs pyflakes  > pyflakes.log || :

And then add pyflakes.log as the file pattern for the Scan for compiler warnings option.

Pylint

Pylint is integrated with the Violation plugin. You have to add the following shell build step:

rm -f pylint.log
for f in `find . -name *.py|egrep -v '^./tests/'`; do
pylint --output-format=parseable --reports=y $f >> pylint.log
done || :

Then add pylint.log in the Report violations table for the pylint line.

Clone digger

Clone digger is integrated through the Violation plugin. You have to add the following shell build step:

python ~/clonedigger/clonedigger/clonedigger.py --cpd-output . || :

and then add output.xml in Report violations table for the cpd line.

Feedback

We want to ear from you! Do you use the tools the same way we do? Do you use other tools?

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