Improved framework for the maintenance of the JET intershot analysis chain

At the JET experiment data from routine diagnostics is analysed automatically by a suite of codes within minutes after operation. The maintenance of these interdependent codes and the provision of a consistent state of the physics database over many experimental campaigns against a backdrop of continuous hardware and software updates, requires well defined maintenance and validation procedures. In this paper, the development of a new generation of maintenance tools using distributed version control and a work-flow following the principle of continuous integration [1] is described.