debug methods for rip

debug.rb

  def self.debug(indent, label, context: nil, stack: nil)
    body = if context && stack
      [
        "#{indent * 2} context",
        *context_chain(indent * 4, context),
        "#{indent * 2} stack",
        *call_stack(indent * 4, stack)
      ]
    elsif context
      [
        "#{indent * 2} context",
        context_chain(indent * 4, context)
      ]
    elsif stack
      [
        "#{indent * 2} stack",
        call_stack(indent * 4, stack)
      ]
    else
      []
    end

    [
      (indent + label),
      *body
    ]
  end

  def self.context_chain(indent, context)
    extract_links(context).map do |link|
      [
        link.class,
        link.object_id,
        (link.origin if link.respond_to?(:origin)),
        link.symbols.to_a
      ]
    end.map do |(klass, object_id, origin, symbols)|
      "#{indent}#{klass}:#{object_id} (#{origin}) [ #{symbols.sort.join(', ')} ]"
    end
  end

  def self.extract_links(context)
    if context.respond_to?(:outer_context) && context.outer_context
      [
        context,
        *extract_links(context.outer_context)
      ]
    else
      [
        context
      ]
    end
  end

  def self.call_stack(indent, native_stack)
    native_stack.select do |frame|
      /rip-rip/ =~ frame
    end.map do |frame|
      indent + frame
    end
  end