class SCSSLint::Linter::DuplicateProperty

Checks for a property declared twice in a rule set.

Public Instance Methods

check_properties(node) { || ... } click to toggle source
# File lib/scss_lint/linter/duplicate_property.rb, line 11
def check_properties(node)
  static_properties(node).each_with_object({}) do |prop, prop_names|
    prop_key = property_key(prop)

    if existing_prop = prop_names[prop_key]
      if existing_prop.line < prop.line - 1 || !ignore_consecutive_of?(prop)
        add_lint(prop, "Property `#{existing_prop.name.join}` already "\
                       "defined on line #{existing_prop.line}")
      else
        prop_names[prop_key] = prop
      end
    else
      prop_names[prop_key] = prop
    end
  end

  yield # Continue linting children
end
visit_media(node)
Alias for: check_properties
visit_mixindef(node)
Alias for: check_properties
visit_root(_node) { || ... } click to toggle source
# File lib/scss_lint/linter/duplicate_property.rb, line 6
def visit_root(_node)
  @ignore_consecutive = config['ignore_consecutive']
  yield
end
visit_rule(node)
Alias for: check_properties

Private Instance Methods

ignore_consecutive_of?(prop) click to toggle source
# File lib/scss_lint/linter/duplicate_property.rb, line 71
def ignore_consecutive_of?(prop)
  case @ignore_consecutive
  when true
    true
  when false
    false
  when nil
    false
  when Array
    @ignore_consecutive.include?(prop.name.join)
  else
    raise SCSSLint::Exceptions::LinterError,
          "#{@ignore_consecutive.inspect} is not a valid value for ignore_consecutive."
  end
end
property_key(prop) click to toggle source

Returns a key identifying the bucket this property and value correspond to for purposes of uniqueness.

# File lib/scss_lint/linter/duplicate_property.rb, line 44
def property_key(prop)
  prop_key = prop.name.join
  prop_value = value_as_string(prop.value.first)

  # Differentiate between values for different vendor prefixes
  prop_value.to_s.scan(/^(-[^-]+-.+)/) do |vendor_keyword|
    prop_key << vendor_keyword.first
  end

  prop_key
end
static_properties(node) click to toggle source
# File lib/scss_lint/linter/duplicate_property.rb, line 36
def static_properties(node)
  node.children
      .select { |child| child.is_a?(Sass::Tree::PropNode) }
      .reject { |prop| prop.name.any? { |item| item.is_a?(Sass::Script::Node) } }
end
value_as_string(value) click to toggle source
# File lib/scss_lint/linter/duplicate_property.rb, line 56
def value_as_string(value)
  case value
  when Sass::Script::Funcall
    value.name
  when Sass::Script::String
    nil
  when Sass::Script::Tree::Literal
    value.value
  when Sass::Script::Tree::ListLiteral
    value.elements.map { |e| value_as_string(e) }.join(' ')
  else
    value.to_s
  end
end