Is there a way of using "native" Crystal to be determine if it's running in an interactive shell session?

Question

If a Crystal executable is running, what would be the recommended way of determining if it's running in an interactive environment?

For example:

`tty`.strip != "not a tty"

But, using native Crystal.

Answer 1

It's IO#tty? method.

Compile a file (foo.cr) with the content:

puts STDIN.tty?

Run it from the shell:

./foo              # => true
echo "foo" | ./foo # => false