[Qgis-developer] QGIS and Coverity scans

[Nathan Woodrow]

> Thanks to Jürgen and Martin's assistance

And yours of course. This is some great stabilization to the product.

- Natahn

On Wed Feb 11 2015 at 9:13:32 PM Nyall Dawson <nyall.dawson at gmail.com>
wrote:

> Hi all,
>
> If you've been following recent git commits, you'll have noticed a lot
> of "Coverity" related commits, and may be wondering what these are all
> about.
>
> Coverity Scan ( https://scan.coverity.com/ ) is a powerful automated
> static code analyser which is able to detect a large number of code
> errors, such as memory leaks and potential crashes, and even things
> like accidental copy/paste errors. It's a well respected service and
> fortunately offers free testing of open source projects (it's quite
> expensive for commercial software).
>
> When we first ran Coverity over the QGIS codebase about 2 weeks ago it
> picked up just over 1000 potential issues, with a defect density of
> about 1 error per 1000 lines of code. Apparently the standard for
> "good" software is a defect density of 1. For comparison, python sits
> at 0.08, and the Linux kernel at 0.53. Libreoffice's latest release
> hit 0.02, and they used this as a big highlight of their press release
> [1].
>
> Thanks to Jürgen and Martin's assistance we're now down to a defect
> density of 0.26. I'm hoping that with a bit more work we can smash
> this down even further and possibly even reach the coveted "Coverity
> Clean" status [2] for 2.8. In any case this is a great demonstration
> that we are serious about code quality and stable releases, and is a
> good selling point for our first LTS release (alongside the expanding
> test suite and Travis CI testing).
>
> Unfortunately we can't automate submission to Coverity via Travis
> builds due to the compilation time required to build QGIS using
> Coverity exceeding Travis' limits, so I'm currently manually
> submitting builds to Coverity on a semi-regular schedule.
>
> The full Coverity defect reports are available by invitation only. If
> you're a developer and want to view them, let me know and I'll add you
> to the group.
>
> Nyall
>
>
> [1] http://blog.documentfoundation.org/2015/01/29/libreoffice-4-4-the-
> most-beautiful-libreoffice-ever/
> [2] Why is this important? well... I really want to beat MapInfo
> there! http://www.pb.com/pbs-voc/product-improvements.shtml
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