Class: Lono::Yamler::Validator

Inherits:
Object
  • Object
show all
Defined in:
lib/lono/yamler/validator.rb

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Validator

Returns a new instance of Validator.



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# File 'lib/lono/yamler/validator.rb', line 3

def initialize(path)
  @path = path
end

Instance Method Details

#handle_yaml_syntax_error(e, path) ⇒ Object 



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# File 'lib/lono/yamler/validator.rb', line 20

def handle_yaml_syntax_error(e, path)
  io = StringIO.new
  io.puts "Invalid yaml. Output written for debugging: #{path}".color(:red)
  io.puts "ERROR: #{e.message}".color(:red)

  # Grab line info.  Example error:
  #   ERROR: (<unknown>): could not find expected ':' while scanning a simple key at line 2 column 1
  md = e.message.match(/at line (\d+) column (\d+)/)
  line = md[1].to_i

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

  if ENV['LONO_TEST']
    io.string
  else
    puts io.string
    exit 1
  end
end

#validate! ⇒ Object 



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# File 'lib/lono/yamler/validator.rb', line 7

def validate!
  validate_yaml(@path)
end

#validate_yaml(path) ⇒ Object 



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# File 'lib/lono/yamler/validator.rb', line 11

def validate_yaml(path)
  text = IO.read(path)
  begin
    YAML.load(text)
  rescue Psych::SyntaxError => e
    handle_yaml_syntax_error(e, path)
  end
end