module Buff::Extensions::Kernel::Reporting
Borrowd and modified from {github.com/rails/rails/blob/master/activesupport/lib/active_support/core_ext/kernel/reporting.rb}
Public Instance Methods
capture(stream) { || ... }
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Captures the given stream and returns it:
stream = capture(:stdout) { puts 'notice' } stream # => "notice\n" stream = capture(:stderr) { warn 'error' } stream # => "error\n"
even for subprocesses:
stream = capture(:stdout) { system('echo notice') } stream # => "notice\n" stream = capture(:stderr) { system('echo error 1>&2') } stream # => "error\n"
# File lib/buff/extensions/kernel/reporting.rb, line 86 def capture(stream) stream = stream.to_s captured_stream = Tempfile.new(stream) stream_io = eval("$#{stream}") origin_stream = stream_io.dup stream_io.reopen(captured_stream) yield stream_io.rewind return captured_stream.read ensure captured_stream.unlink stream_io.reopen(origin_stream) end
Also aliased as: silence
enable_warnings() { || ... }
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Sets $VERBOSE to true
for the duration of the block and back to its original value afterwards.
# File lib/buff/extensions/kernel/reporting.rb, line 23 def enable_warnings with_warnings(true) { yield } end
quietly() { || ... }
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Silences both STDOUT and STDERR, even for subprocesses.
quietly { system 'bundle install' }
# File lib/buff/extensions/kernel/reporting.rb, line 106 def quietly silence_stream(STDOUT) do silence_stream(STDERR) do yield end end end
silence_stream(stream) { || ... }
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Silences any stream for the duration of the block.
silence_stream(STDOUT) do puts 'This will never be seen' end puts 'But this will'
# File lib/buff/extensions/kernel/reporting.rb, line 48 def silence_stream(stream) old_stream = stream.dup stream.reopen(RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ ? 'NUL:' : '/dev/null') stream.sync = true yield ensure stream.reopen(old_stream) end
silence_warnings() { || ... }
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Sets $VERBOSE to nil for the duration of the block and back to its original value afterwards.
silence_warnings do value = noisy_call # no warning voiced end noisy_call # warning voiced
# File lib/buff/extensions/kernel/reporting.rb, line 17 def silence_warnings with_warnings(nil) { yield } end
suppress(*exception_classes) { || ... }
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Blocks and ignores any exception passed as argument if raised within the block.
suppress(ZeroDivisionError) do 1/0 puts 'This code is NOT reached' end puts 'This code gets executed and nothing related to ZeroDivisionError was seen'
# File lib/buff/extensions/kernel/reporting.rb, line 65 def suppress(*exception_classes) yield rescue Exception => e raise unless exception_classes.any? { |cls| e.kind_of?(cls) } end
with_warnings(flag) { || ... }
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Sets $VERBOSE for the duration of the block and back to its original value afterwards.
# File lib/buff/extensions/kernel/reporting.rb, line 29 def with_warnings(flag) old_verbose, $VERBOSE = $VERBOSE, flag yield ensure $VERBOSE = old_verbose end