Avoid configuration prompts when installing freebsd ports

When installing ports with many dependencies, repeatedly stopping the compilation to show a configuration prompt is annoying, especially if you want the default values. This can be avoided in a couple of ways.

When installing a port, adding either of these batch flag uses default.

make install BATCH=YES

make install -DBATCH

The batch flag can also be set as an environment variable.

export BATCH=yes

What if you want to configure everything first and then compile?

make config-recursive

Remember that this command needs to be run many times until all configuration has been performed.

Sources:
1 unix.stackexchange.com
2 unix.stackexchange.com