method

capture

rails latest stable - Class: Kernel

capture(stream)

public

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 activesupport/lib/active_support/core_ext/kernel/reporting.rb, line 89
  def capture(stream)
    ActiveSupport::Deprecation.warn(
      "`#capture(stream)` is deprecated and will be removed in the next release."
    ) #not thread-safe
    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.close
    captured_stream.unlink
    stream_io.reopen(origin_stream)
  end

capture

Method deprecated or moved

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