When compiling Ruby on Ubuntu 20.04 the libreadline-dev package is
required to compile the Ruby readline extension. This shim ensure that
it is present and fail at the beginning of the script to avoid the user
waiting the end of the ruby installtion to restart.
When compiling Ruby on Ubuntu 20.04 the libreadline-dev package is required to compile the Ruby readline extension. This shim ensure that it is present and fail at the beginning of the script to avoid the user waiting the end of the ruby installtion to restart.