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Temporarily suppress STDOUT and STDERR (ruby)
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# Temporarily redirects STDOUT and STDERR to /dev/null | |
# but does print exceptions should there occur any. | |
# Call as: | |
# suppress_output { puts 'never printed' } | |
# | |
def suppress_output | |
original_stderr = $stderr.clone | |
original_stdout = $stdout.clone | |
$stderr.reopen(File.new('/dev/null', 'w')) | |
$stdout.reopen(File.new('/dev/null', 'w')) | |
yield | |
ensure | |
$stdout.reopen(original_stdout) | |
$stderr.reopen(original_stderr) | |
end |
@iamtheiconoclast I realise I never looked at the comments here. 😅 Thanks for your suggested simplifications; I've amended the Gist to reflect them.
Windows Version with File::NULL
# Temporarily redirects STDOUT and STDERR to /dev/null
# but does print exceptions should there occur any.
# Call as:
# suppress_output { puts 'never printed' }
#
def suppress_output
original_stderr = $stderr.clone
original_stdout = $stdout.clone
$stderr.reopen(File.new(File::NULL, 'w'))
$stdout.reopen(File.new(File::NULL, 'w'))
yield
ensure
$stdout.reopen(original_stdout)
$stderr.reopen(original_stderr)
end
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@nancy-gomez, for this you might want to use https://docs.ruby-lang.org/en/2.5.0/Open3.html#method-c-popen3