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(2021-03-17) SavannahAPI - A more systematic overview about bugs and patches


The GNU Octave project is registered on the code hosting platform GNU Savannah since April 2002. With about 10,000 of 60,000 bugs, Octave is one of its biggest and most active users. However, the issue tracker interface has some limitations and valuable information is not as accessible as it can be. A data scraping approach SavannahAPI overcomes some of these limitations and offers interesting new insights and overviews.

(2021-01-27) Tell me about the world


A short demonstration using pkg-json with GNU Octave to plot a simplified two dimensional political “World Map” from public available JSON data provided by the NASA. The following code can be used, to easily visualize data divided by countries (e.g. population densities, health data, economic figures, tax, export, etc.).

(2020-11-23) Update: Support for the JSON data format after GSoC 2020


The Google Summer of Code (GSoC) 2020 is over and I had the pleasure to mentor Abdallah Elshamy, who enriched Octave with the jsondecode() and jsonencode() functions. A remaining issue was the translation of the Octave function matlab.lang.makeValidName to the C++ language. This is now accomplished and the overall results are great.

(2020-11-08) rsync boosted Buildbots


Using rsync instead of Buildbot’s own file transfers, which are known to be slow, significantly reduced the file transfer time between the Buildbot Workers and the Buildbot Master from 25.5 hours to about 18 minutes (-98%). This improvement, and a few others, enables a single “strong” Worker to build and publish Octave and all MS Windows installers within 24 hours or with four parallel Workers within 6 hours.

(2020-10-16) Fresh brewed Octave - every day!


The octave-buildbot Server and Worker matured a lot in the past two months since I wrote about them in August. Finally, the system is capable of delivering once per day a “fresh brewed” stable Octave release (tarballs, all flavors of MS Windows installers, and the Doxygen documentation). See it yourself on https://octave.space.

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