Sha256: 8c705a0cfa5d9c2ecd99751713e219521cdba26e454c6805b7770b2481bc8517
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Versions: 10
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Contents
module Kernel
# Silence a stream and/or warnings...
#
# silence(:stdout) do
# puts "won't see me"
# end
#
# Supported +streams+ are +stderr+, +stdout+, +verbose+, +debug+,
# and +warnings+, which is the same as +verbose+. You can also
# use the actual streams, STDERR and STDOUT.
def silence(*streams) #:yield:
streams = streams.map do |stream|
case stream
when :stderr
STDERR
when :stdout
STDOUT
else
stream
end
end
if streams.empty?
yield
else
silence_stream(*streams){ yield }
end
end
# Just like silence_stream, but will default to
# STDOUT, STDERR if no streams are given.
def silently(*streams) #:yeild:
streams = [STDOUT, STDERR] if streams.empty?
silence_stream(*streams){ yield }
end
# Silences any stream for the duration of the block...
#
# silence_stream(STDOUT) do
# puts 'This will never be seen'
# end
#
# puts 'But this will'
#
# CREDIT: David Heinemeier Hansson
def silence_stream(*streams) #:yeild:
on_hold = streams.collect{ |stream| stream.dup }
streams.each do |stream|
stream.reopen(RUBY_PLATFORM =~ /mswin/ ? 'NUL:' : '/dev/null')
stream.sync = true
end
yield
ensure
streams.each_with_index do |stream, i|
stream.reopen(on_hold[i])
end
end
# Equivalent to `silence_stream(STDERR)`.
def silence_stderr #:yeild:
silence_stream(STDERR) { yield }
end
# Equivalent to `silence_stream(STDOUT)`.
def silence_stdout #:yeild:
silence_stream(STDOUT) { yield }
end
end
Version data entries
10 entries across 9 versions & 2 rubygems