Geas is a tool detecting the runnable official Erlang release window for
Geas will tell you also :
- what are the offending functions in the beam/source files that
reduce the available window.
- if some beam files are compiled native.
- the installed patches and recommend patches that should be
installed depending your code.
Geas can be part of your CI process by checking compatibility of your
project against version constraints, before testing it with several OTP
Geas is available as a module, erlang.mk and rebar 2/3 plugins.