Module: DeepCover::Tools::TruncateBacktrace

Defined in:
lib/deep_cover/tools/truncate_backtrace.rb

Instance Method Summary collapse

Instance Method Details

#truncate_backtrace(backtrace, extra_context: 10) ⇒ Object 



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# File 'lib/deep_cover/tools/truncate_backtrace.rb', line 5

def truncate_backtrace(backtrace, extra_context: 10)
  backtrace = backtrace.backtrace if backtrace.is_a?(Exception)
  trace_lines = backtrace.uniq

  keep_from_begin = 0
  keep_from_end = backtrace.size - 1

  trace_lines.each do |line|
    from_begin = backtrace.index(line)
    from_end = backtrace.rindex(line)
    if from_begin <= backtrace.size - 1 - from_end
      keep_from_begin = [keep_from_begin, from_begin].max
    else
      keep_from_end = [keep_from_end, from_end].min
    end
  end

  keep_from_begin += extra_context
  keep_from_end -= extra_context

  return backtrace if keep_from_begin + 5 >= keep_from_end

  result = backtrace[0..keep_from_begin]
  result << "... #{keep_from_end - keep_from_begin - 1} levels..."
  result.concat backtrace[keep_from_end..-1]
end