I can do OUTPUT=$(grunt test) and that puts the output into OUTPUT but it's no longer on the screen. I need to see the output as it comes as well, so I can't just wait and then echo $OUTPUT.

How can I capture the output of a program and still have it goto the screen at the same time?


You could try something like this:

exec 9>&1
OUTPUT=$(grunt test | tee /dev/fd/9)
exec 9>&-

It copies the current stdout to file descriptor 9, uses tee to replicate grunt's output to that file descriptor, then afterwards closes the temporary file descriptor.

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