node_modules/eslint-plugin-import/lib/rules/dynamic-import-chunkname.js

'use strict';

var _vm = require('vm');

var _vm2 = _interopRequireDefault(_vm);

var _docsUrl = require('../docsUrl');

var _docsUrl2 = _interopRequireDefault(_docsUrl);

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

module.exports = {
  meta: {
    type: 'suggestion',
    docs: {
      url: (0, _docsUrl2.default)('dynamic-import-chunkname')
    },
    schema: [{
      type: 'object',
      properties: {
        importFunctions: {
          type: 'array',
          uniqueItems: true,
          items: {
            type: 'string'
          }
        },
        webpackChunknameFormat: {
          type: 'string'
        }
      }
    }]
  },

  create: function (context) {
    const config = context.options[0];

    var _ref = config || {},
        _ref$importFunctions = _ref.importFunctions;

    const importFunctions = _ref$importFunctions === undefined ? [] : _ref$importFunctions;

    var _ref2 = config || {},
        _ref2$webpackChunknam = _ref2.webpackChunknameFormat;

    const webpackChunknameFormat = _ref2$webpackChunknam === undefined ? '[0-9a-zA-Z-_/.]+' : _ref2$webpackChunknam;


    const paddedCommentRegex = /^ (\S[\s\S]+\S) $/;
    const commentStyleRegex = /^( \w+: ("[^"]*"|\d+|false|true),?)+ $/;
    const chunkSubstrFormat = ` webpackChunkName: "${webpackChunknameFormat}",? `;
    const chunkSubstrRegex = new RegExp(chunkSubstrFormat);

    return {
      CallExpression(node) {
        if (node.callee.type !== 'Import' && importFunctions.indexOf(node.callee.name) < 0) {
          return;
        }

        const sourceCode = context.getSourceCode();
        const arg = node.arguments[0];
        const leadingComments = sourceCode.getComments(arg).leading;

        if (!leadingComments || leadingComments.length === 0) {
          context.report({
            node,
            message: 'dynamic imports require a leading comment with the webpack chunkname'
          });
          return;
        }

        let isChunknamePresent = false;

        for (const comment of leadingComments) {
          if (comment.type !== 'Block') {
            context.report({
              node,
              message: 'dynamic imports require a /* foo */ style comment, not a // foo comment'
            });
            return;
          }

          if (!paddedCommentRegex.test(comment.value)) {
            context.report({
              node,
              message: `dynamic imports require a block comment padded with spaces - /* foo */`
            });
            return;
          }

          try {
            // just like webpack itself does
            _vm2.default.runInNewContext(`(function(){return {${comment.value}}})()`);
          } catch (error) {
            context.report({
              node,
              message: `dynamic imports require a "webpack" comment with valid syntax`
            });
            return;
          }

          if (!commentStyleRegex.test(comment.value)) {
            context.report({
              node,
              message: `dynamic imports require a leading comment in the form /*${chunkSubstrFormat}*/`
            });
            return;
          }

          if (chunkSubstrRegex.test(comment.value)) {
            isChunknamePresent = true;
          }
        }

        if (!isChunknamePresent) {
          context.report({
            node,
            message: `dynamic imports require a leading comment in the form /*${chunkSubstrFormat}*/`
          });
        }
      }
    };
  }
};
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