eslint-import-resolver-webpack-alias/index.js

eslint import resolver for webpack alias

'use strict';

const path = require('path');

const localResolve = module.constructor._findPath;
const defaultExtension = ['.js', '.json'];

function findConfiguredPath(modulePath, alias) {
  const __pathes = modulePath.split('/');
  let aliasPath = null;

  if (__pathes.length === 1) {
    aliasPath = alias[__pathes[0]] || alias[__pathes[0] + '$'];
  } else {
    aliasPath = alias[__pathes[0]];
  }
  return aliasPath;
}

function isToFile(path, extensions) {
  return extensions.some(ext => path.endsWith(ext));
}
exports.interfaceVersion = 2;

exports.resolve = function(modulePath, sourceFile, config) {
  if (config && config.resolve && config.resolve.alias) {
    const __pathes = modulePath.split('/');

    const aliasPath = findConfiguredPath(modulePath, config.resolve.alias);

    if (aliasPath) {
      let filename = null;

      if (isToFile(aliasPath, defaultExtension)) {
        filename = localResolve(aliasPath, []);
      } else {
        const filePath = aliasPath.startsWith('.')
          ? path.join(__dirname, aliasPath, ...__pathes.slice(1))
          : path.join(aliasPath, ...__pathes.slice(1));
        filename = localResolve(filePath, []);
      }
      return {
        found: !!filename,
        path: filename || null
      };
    }
  }
  return { found: false };
};