canonical/node_modules/eslint-plugin-import/lib/rules/no-duplicates.js

Canonical code style linter and formatter for JavaScript, SCSS, CSS and JSON.

'use strict';

var _slicedToArray2 = require('babel-runtime/helpers/slicedToArray');

var _slicedToArray3 = _interopRequireDefault(_slicedToArray2);

var _getIterator2 = require('babel-runtime/core-js/get-iterator');

var _getIterator3 = _interopRequireDefault(_getIterator2);

var _set = require('babel-runtime/core-js/set');

var _set2 = _interopRequireDefault(_set);

var _map = require('babel-runtime/core-js/map');

var _map2 = _interopRequireDefault(_map);

var _resolve = require('../core/resolve');

var _resolve2 = _interopRequireDefault(_resolve);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

module.exports = function (context) {
  var imported = new _map2.default();
  return {
    'ImportDeclaration': function ImportDeclaration(n) {
      // resolved path will cover aliased duplicates
      var resolvedPath = (0, _resolve2.default)(n.source.value, context) || n.source.value;

      if (imported.has(resolvedPath)) {
        imported.get(resolvedPath).add(n.source);
      } else {
        imported.set(resolvedPath, new _set2.default([n.source]));
      }
    },

    'Program:exit': function ProgramExit() {
      var _iteratorNormalCompletion = true;
      var _didIteratorError = false;
      var _iteratorError = undefined;

      try {
        for (var _iterator = (0, _getIterator3.default)(imported.entries()), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
          var _step$value = (0, _slicedToArray3.default)(_step.value, 2);

          var _module = _step$value[0];
          var nodes = _step$value[1];

          if (nodes.size > 1) {
            var _iteratorNormalCompletion2 = true;
            var _didIteratorError2 = false;
            var _iteratorError2 = undefined;

            try {
              for (var _iterator2 = (0, _getIterator3.default)(nodes), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
                var node = _step2.value;

                context.report(node, '\'' + _module + '\' imported multiple times.');
              }
            } catch (err) {
              _didIteratorError2 = true;
              _iteratorError2 = err;
            } finally {
              try {
                if (!_iteratorNormalCompletion2 && _iterator2.return) {
                  _iterator2.return();
                }
              } finally {
                if (_didIteratorError2) {
                  throw _iteratorError2;
                }
              }
            }
          }
        }
      } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion && _iterator.return) {
            _iterator.return();
          }
        } finally {
          if (_didIteratorError) {
            throw _iteratorError;
          }
        }
      }
    }
  };
};
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