this is how we configure puppet-lint in our Rakefile

Rakefile

# Common configuration
exclude_paths = [
  'pkg/**/*',
  'vendor/**/*',
  'spec/fixtures/modules/**/*',
  'modules/**/*',
]

# Configuration for 'rake lint'. See documentation at
# https://github.com/rodjek/puppet-lint
PuppetLint::RakeTask.new :lint do |config|
  config.disable_checks = ['2sp_soft_tabs', '80chars', 'arrow_alignment', 'documentation',
                           'selector_inside_resource']
  config.fail_on_warnings = false
  config.ignore_paths = exclude_paths
  config.log_format = '%{path}:%{line}:%{column}:%{check}:%{KIND}:%{message}'
end