Module: Hammertime

Included in:
Object
Defined in:
lib/hammertime.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.debug_supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hammertime.rb', line 21

def self.debug_supported?
  require 'ruby-debug'
  @debug_support = true
rescue LoadError
  warn "Unable to load ruby-debug"
  warn "Gem not installed or debugging not supported on your platform"
  @debug_support = false
end

.ignored_errors ⇒ Object 



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# File 'lib/hammertime.rb', line 5

def self.ignored_errors
  @ignored_errors ||= [LoadError]
end

.ignored_lines ⇒ Object 



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# File 'lib/hammertime.rb', line 9

def self.ignored_lines
  @ignored_lines ||= []
end

.stopped ⇒ Object 



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# File 'lib/hammertime.rb', line 13

def self.stopped
  @stopped ||= false
end

.stopped=(value) ⇒ Object 



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# File 'lib/hammertime.rb', line 17

def self.stopped=(value)
  @stopped = value
end

Instance Method Details

#fail(*args) ⇒ Object 



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# File 'lib/hammertime.rb', line 115

def fail(*args)
  hammertime_raise(*args)
end

#hammertime_original_raise(*args) ⇒ Object 



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# File 'lib/hammertime.rb', line 111

def hammertime_original_raise(*args)
  Kernel.instance_method(:raise).bind(self).call(*args)
end

#hammertime_raise(*args) ⇒ Object 



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# File 'lib/hammertime.rb', line 30

def hammertime_raise(*args)
  backtrace = caller(2)
  fallback = lambda do
    hammertime_original_raise(*args)
  end
  exclusive_and_non_reentrant(fallback) do
    error, backtrace =
      case args.size
      when 0 then [($!.nil? ? RuntimeError.new : $!), backtrace]
      when 1 then
        if args[0].is_a?(String)
          [RuntimeError.exception(args[0]), backtrace]
        else
          [args[0].exception, backtrace]
        end
      when 2 then
        [args[0].exception(args[1]), backtrace]
      when 3 then
        [args[0].exception(args[1]), args[2]]
      else
        super(ArgumentError, "wrong number of arguments", backtrace)
      end
    error.set_backtrace(backtrace)

    if hammertime_ignore_error?(error, backtrace)
      hammertime_original_raise(error)
    else
      ::Hammertime.stopped = true
    end

    c = ::Hammertime.hammertime_console
    c.say "\n"
    c.say "=== Stop! Hammertime. ==="
    c.say "An error has occurred at #{backtrace.first}"
    c.say "The error is: #{error.inspect}"
    menu_config = lambda do |menu|
      menu.prompt    = "What now?"
      menu.default   = "Continue"
      menu.select_by = :index_or_name

      menu.choice "Continue (process the exception normally)" do
        hammertime_original_raise(error)
        true
      end
      menu.choice "Ignore (proceed without raising an exception)" do
        true
      end
      menu.choice "Permit by type (don't ask about future errors of this type)" do
        ::Hammertime.ignored_errors << error.class
        c.say "Added #{error.class} to permitted error types"
        hammertime_original_raise(error)
        true
      end
      menu.choice "Permit by line (don't ask about future errors raised from this point)" do
        ::Hammertime.ignored_lines << backtrace.first
        c.say "Added #{backtrace.first} to permitted error lines"
        hammertime_original_raise(error)
        true
      end
      menu.choice "Backtrace (show the call stack leading up to the error)" do
        backtrace.each do |frame| c.say frame end
        false
      end
      if Hammertime.debug_supported?
        menu.choice "Debug (start a debugger)" do
          debugger
          false
        end
      end
      menu.choice "Console (start an IRB session)" do
        require 'irb'
        IRB.start
        false
      end
    end
    continue = c.choose(&menu_config) until continue
  end
ensure
  ::Hammertime.stopped = false
end

#raise(*args) ⇒ Object 



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# File 'lib/hammertime.rb', line 119

def raise(*args)
  hammertime_raise(*args)
end