Module: Lono::Template::Evaluate

Included in:
Strategy::Dsl::Builder::Syntax, Strategy::Erb
Defined in:
lib/lono/template/evaluate.rb

Instance Method Summary collapse

Instance Method Details

#evaluate_template_path(path) ⇒ Object 



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# File 'lib/lono/template/evaluate.rb', line 3

def evaluate_template_path(path)
  return unless File.exist?(path)

  begin
    instance_eval(File.read(path), path)
  rescue Exception => e
    template_evaluation_error(e)
    puts "\nFull error:"
    raise
  end
end

#template_evaluation_error(e) ⇒ Object

Prints out a user friendly task_definition error message



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# File 'lib/lono/template/evaluate.rb', line 16

def template_evaluation_error(e)
  lines = e.backtrace.reject { |l| l.include?("/lib/lono/") }
  error_info = lines.first
  path, line_no, _ = error_info.split(':')
  line_no = line_no.to_i
  puts "Error evaluating #{path}:".color(:red)
  puts e.message
  puts "Here's the line in #{path} with the error:\n\n"

  contents = IO.read(path)
  content_lines = contents.split("\n")
  context = 5 # lines of context
  top, bottom = [line_no-context-1, 0].max, line_no+context-1
  spacing = content_lines.size.to_s.size
  content_lines[top..bottom].each_with_index do |line_content, index|
    line_number = top+index+1
    if line_number == line_no
      printf("%#{spacing}d %s\n".color(:red), line_number, line_content)
    else
      printf("%#{spacing}d %s\n", line_number, line_content)
    end
  end
end