3.6 Handling user input

If your port requires user input to build, configure, or install, then set IS_INTERACTIVE in your Makefile. This will allow ``overnight builds'' to skip your port if the user sets the variable BATCH in his environment (and if the user sets the variable INTERACTIVE, then only those ports requiring interaction are built).

It is also recommended that if there are reasonable default answers to the questions, you check the PACKAGE_BUILDING variable and turn off the interactive script when it is set. This will allow us to build the packages for CDROMs and FTP.