sass-lint/lib/rules/placeholder-in-extend.js

Sass linter. Compatible but different from scss-lint

'use strict';

var helpers = require('../helpers');

module.exports = {
  'name': 'placeholder-in-extend',
  'defaults': {},
  'detect': function (ast, parser) {
    var result = [];

    ast.traverseByType('extend', function (extend) {
      extend.forEach('simpleSelector', function (selector) {
        var placeholder = false;
        selector.content.forEach(function (selectorPiece) {
          if (selectorPiece.type === 'placeholder') {
            placeholder = true;
          }
        });

        if (!placeholder) {
          result = helpers.addUnique(result, {
            'ruleId': parser.rule.name,
            'line': selector.start.line,
            'column': selector.start.column,
            'message': '@extend must be used with a %placeholder',
            'severity': parser.severity
          });
        }
      });
    });

    return result;
  }
};