The libvirt repository makes use of a large number of programming languages. It is anticipated that in the future libvirt will adopt use of other new languages. To reduce the overall burden on developers, there is thus a general desire to phase out usage of some of the existing languages.
The preferred languages at this time are:
C - for the main libvirt codebase. Dialect supported by GCC/Clang only.
Python - for supporting build scripts / tools. Code must run with both version 2.7 and 3.x at this time.
Languages that should not be used for any new contributions:
Perl - build scripts must be written in Python instead.
Shell - build scripts must be written in Python instead.