Implementation of FAB in Momentum Simulation Systems

The Met Office is preparing an important change in managing their software stack, migrating from the old Subversion-based versioning system to the modern Git. Besides required changed to all existing suites, there is also a need to replace the outdated build tool called FCM: FCM does not support git, has shortcoming in supporting LFRic, and is written in a language that is not well-supported by Met Office developers anymore. 6 years ago, the Met Office decided to implement a new, modern build system called Fab that...