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module Kernel
def silence_stdout_if(cond, &run)
silence_stream_if(cond, STDOUT, &run)
end
def silence_stderr_if(cond, &run)
silence_stream_if(cond, STDERR, &run)
end
def silence_stream_if(cond, stream, &run)
if cond
silence_stream(stream, &run)
else
run.call
end
end
def silence_stream(stream)
old_stream = stream.dup
stream.reopen(File::NULL)
stream.sync = true
yield
ensure
stream.reopen(old_stream)
old_stream.close
end unless method_defined?(:silence_stream)
end
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