Does anyone know of a framework (written in PHP) to update PHP-based software ?
I'm thinking of a library that assists in checking for updates online and that provides methods for generating, downloading, verifying and installing update packages, maybe even with encryption and public-key signatures.
Ideally with a non-copyleft open source license (e.g. BSD or MIT License, no GPL).
While source control tools are nice in theory, they can complicate (initial) deployment of PHP applications as they are not PHP-based (limits portability) and are often quite large.