Exception: Sprinkle::Errors::TemplateError

Inherits:
RuntimeError
  • Object
show all
Defined in:
lib/sprinkle/errors/template_error.rb

Overview

Blatantly stole this from Chef

Constant Summary collapse

SOURCE_CONTEXT_WINDOW = 
2

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(original_exception, template, context) ⇒ TemplateError

Returns a new instance of TemplateError.



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# File 'lib/sprinkle/errors/template_error.rb', line 7

def initialize(original_exception, template, context)
  @original_exception, @template, @context = original_exception, template, context
end

Instance Attribute Details

#context ⇒ Object (readonly)

:nodoc:



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# File 'lib/sprinkle/errors/template_error.rb', line 4

def context
  @context
end

#original_exception ⇒ Object (readonly)

:nodoc:



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# File 'lib/sprinkle/errors/template_error.rb', line 4

def original_exception
  @original_exception
end

Instance Method Details

#line_number ⇒ Object 



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# File 'lib/sprinkle/errors/template_error.rb', line 15

def line_number
  @line_number ||= $1.to_i if original_exception.backtrace.find {|line| line =~ /\(erubis\):(\d+)/ }
end

#message ⇒ Object 



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# File 'lib/sprinkle/errors/template_error.rb', line 11

def message
  @original_exception.message
end

#source_listing ⇒ Object 



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# File 'lib/sprinkle/errors/template_error.rb', line 23

def source_listing
  return nil if line_number.nil?

  @source_listing ||= begin
    line_index = line_number - 1
    beginning_line = line_index <= SOURCE_CONTEXT_WINDOW ? 0 : line_index - SOURCE_CONTEXT_WINDOW
    source_size = SOURCE_CONTEXT_WINDOW * 2 + 1
    lines = @template.split(/\n/)
    contextual_lines = lines[beginning_line, source_size]
    output = []
    contextual_lines.each_with_index do |line, index|
      line_number = (index+beginning_line+1).to_s.rjust(3)
      output << "#{line_number}: #{line}"
    end
    output.join("\n")
  end
end

#source_location ⇒ Object 



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# File 'lib/sprinkle/errors/template_error.rb', line 19

def source_location
  "on line ##{line_number}"
end

#to_s ⇒ Object 



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# File 'lib/sprinkle/errors/template_error.rb', line 41

def to_s
  "\n\n#{self.class} (#{message}) #{source_location}:\n\n" +
    "#{source_listing}\n\n  #{original_exception.backtrace.join("\n  ")}\n\n"
end