Running a shell command from Ruby: capturing the output while displaying the output?

Question

I have a problem.

I want to run a ruby script from another ruby script and capture it\'s output information while letting it output to the screen too.

runner

Answer 1

runner.rb

STDOUT.print "Enter your password: "
password = gets.chomp
puts "Here is your password: #{password}"

Note STDOUT.print

start.rb

require "stringio"

buffer = StringIO.new
$stdout = buffer

require "runner"

$stdout = STDOUT
buffer.rewind

puts buffer.read.match(/Here is your (password: .*)/).captures[0].to_s

output

Enter your password: hello
password: hello

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Read more...

I recently did a write-up on this here: Output Buffering with Ruby