Getting Erlang version
Use this helper function:
erlang_version() {
erl -eval '
{ok, Version} = file:read_file(
filename:join(
[code:root_dir(),
"releases",
erlang:system_info(otp_release),
"OTP_VERSION"])),
io:format("Erlang/OTP ~s", [Version]),
halt().' -noshell
}