GoScrobble/web/node_modules/eslint-plugin-import/lib/rules/group-exports.js

'use strict';var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);
var _object = require('object.values');var _object2 = _interopRequireDefault(_object);
var _arrayPrototype = require('array.prototype.flat');var _arrayPrototype2 = _interopRequireDefault(_arrayPrototype);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { 'default': obj };}

var meta = {
  type: 'suggestion',
  docs: {
    url: (0, _docsUrl2['default'])('group-exports') } };


/* eslint-disable max-len */
var errors = {
  ExportNamedDeclaration: 'Multiple named export declarations; consolidate all named exports into a single export declaration',
  AssignmentExpression: 'Multiple CommonJS exports; consolidate all exports into a single assignment to `module.exports`' };

/* eslint-enable max-len */

/**
                             * Returns an array with names of the properties in the accessor chain for MemberExpression nodes
                             *
                             * Example:
                             *
                             * `module.exports = {}` => ['module', 'exports']
                             * `module.exports.property = true` => ['module', 'exports', 'property']
                             *
                             * @param     {Node}    node    AST Node (MemberExpression)
                             * @return    {Array}           Array with the property names in the chain
                             * @private
                             */
function accessorChain(node) {
  var chain = [];

  do {
    chain.unshift(node.property.name);

    if (node.object.type === 'Identifier') {
      chain.unshift(node.object.name);
      break;
    }

    node = node.object;
  } while (node.type === 'MemberExpression');

  return chain;
}

function create(context) {
  var nodes = {
    modules: {
      set: new Set(),
      sources: {} },

    types: {
      set: new Set(),
      sources: {} },

    commonjs: {
      set: new Set() } };



  return {
    ExportNamedDeclaration: function () {function ExportNamedDeclaration(node) {
        var target = node.exportKind === 'type' ? nodes.types : nodes.modules;
        if (!node.source) {
          target.set.add(node);
        } else if (Array.isArray(target.sources[node.source.value])) {
          target.sources[node.source.value].push(node);
        } else {
          target.sources[node.source.value] = [node];
        }
      }return ExportNamedDeclaration;}(),

    AssignmentExpression: function () {function AssignmentExpression(node) {
        if (node.left.type !== 'MemberExpression') {
          return;
        }

        var chain = accessorChain(node.left);

        // Assignments to module.exports
        // Deeper assignments are ignored since they just modify what's already being exported
        // (ie. module.exports.exported.prop = true is ignored)
        if (chain[0] === 'module' && chain[1] === 'exports' && chain.length <= 3) {
          nodes.commonjs.set.add(node);
          return;
        }

        // Assignments to exports (exports.* = *)
        if (chain[0] === 'exports' && chain.length === 2) {
          nodes.commonjs.set.add(node);
          return;
        }
      }return AssignmentExpression;}(),

    'Program:exit': function () {function onExit() {
        // Report multiple `export` declarations (ES2015 modules)
        if (nodes.modules.set.size > 1) {
          nodes.modules.set.forEach(function (node) {
            context.report({
              node: node,
              message: errors[node.type] });

          });
        }

        // Report multiple `aggregated exports` from the same module (ES2015 modules)
        (0, _arrayPrototype2['default'])((0, _object2['default'])(nodes.modules.sources).
        filter(function (nodesWithSource) {return Array.isArray(nodesWithSource) && nodesWithSource.length > 1;})).
        forEach(function (node) {
          context.report({
            node: node,
            message: errors[node.type] });

        });

        // Report multiple `export type` declarations (FLOW ES2015 modules)
        if (nodes.types.set.size > 1) {
          nodes.types.set.forEach(function (node) {
            context.report({
              node: node,
              message: errors[node.type] });

          });
        }

        // Report multiple `aggregated type exports` from the same module (FLOW ES2015 modules)
        (0, _arrayPrototype2['default'])((0, _object2['default'])(nodes.types.sources).
        filter(function (nodesWithSource) {return Array.isArray(nodesWithSource) && nodesWithSource.length > 1;})).
        forEach(function (node) {
          context.report({
            node: node,
            message: errors[node.type] });

        });

        // Report multiple `module.exports` assignments (CommonJS)
        if (nodes.commonjs.set.size > 1) {
          nodes.commonjs.set.forEach(function (node) {
            context.report({
              node: node,
              message: errors[node.type] });

          });
        }
      }return onExit;}() };

}

module.exports = {
  meta: meta,
  create: create };
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