react-scripts/node_modules/eslint-plugin-import/lib/rules/export.js

Configuration and scripts for Create React App.

'use strict';

var _es6Map = require('es6-map');

var _es6Map2 = _interopRequireDefault(_es6Map);

var _es6Set = require('es6-set');

var _es6Set2 = _interopRequireDefault(_es6Set);

var _getExports = require('../core/getExports');

var _getExports2 = _interopRequireDefault(_getExports);

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

module.exports = function (context) {
  var named = new _es6Map2.default();

  function addNamed(name, node) {
    var nodes = named.get(name);

    if (nodes == null) {
      nodes = new _es6Set2.default();
      named.set(name, nodes);
    }

    nodes.add(node);
  }

  return {
    'ExportDefaultDeclaration': function ExportDefaultDeclaration(node) {
      return addNamed('default', node);
    },

    'ExportSpecifier': function ExportSpecifier(node) {
      addNamed(node.exported.name, node.exported);
    },

    'ExportNamedDeclaration': function ExportNamedDeclaration(node) {
      if (node.declaration == null) return;

      if (node.declaration.id != null) {
        addNamed(node.declaration.id.name, node.declaration.id);
      }

      if (node.declaration.declarations == null) return;

      node.declaration.declarations.forEach(function (declaration) {
        (0, _getExports.recursivePatternCapture)(declaration.id, function (v) {
          return addNamed(v.name, v);
        });
      });
    },

    'ExportAllDeclaration': function ExportAllDeclaration(node) {
      if (node.source == null) return; // not sure if this is ever true

      var remoteExports = _getExports2.default.get(node.source.value, context);
      if (remoteExports == null) return;

      if (remoteExports.errors.length) {
        remoteExports.reportErrors(context, node);
        return;
      }
      var any = false;
      remoteExports.forEach(function (v, name) {
        return name !== 'default' && (any = true) && // poor man's filter
        addNamed(name, node);
      });

      if (!any) {
        context.report(node.source, 'No named exports found in module \'' + node.source.value + '\'.');
      }
    },

    'Program:exit': function ProgramExit() {
      named.forEach(function (nodes, name) {
        if (nodes.size <= 1) return;

        nodes.forEach(function (node) {
          if (name === 'default') {
            context.report(node, 'Multiple default exports.');
          } else context.report(node, 'Multiple exports of name \'' + name + '\'.');
        });
      });
    }
  };
};
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