Running a command from Ruby displaying and capturing the output

Question

Is there some way to run a (shell) command from Ruby displaying but also capturing the output? Maybe with the help of some gem?

What I mean by displaying is not prin

Answer 1

If you are willing to explore a solution outside the standard library, you may also use Mixlib::ShellOut to both stream output and capture it:

require 'mixlib/shellout'
cmd = 'while true; do date; sleep 2; done'
so = Mixlib::ShellOut.new(cmd)
so.live_stream = $stdout
so.run_command
out = so.stdout