old_contents: if (typeof exports != "object" || typeof module != "object")
    throw new Error("This plugin works only in a CommonJS environment")
  
  var infer = require("../lib/infer");
  var tern = require("../lib/tern");
  require("./commonjs");
  require("./es_modules");
  
  var fs = require('fs');
  var path = require("path");
  var ResolverFactory = require("enhanced-resolve").ResolverFactory;
  var SyncNodeJsInputFileSystem = require("enhanced-resolve/lib/SyncNodeJsInputFileSystem");
  
  function getResolver(configPath) {
    var config = {
      unsafeCache: true,
      modules: ["node_modules"],
      extensions: [".js", ".jsx", ".json"],
      aliasFields: ["browser"],
      mainFields: ["browser", "web", "browserify", "main"],
      fileSystem: new SyncNodeJsInputFileSystem()
    }
    var webpackConfig = fs.existsSync(configPath) ? require(configPath) : null
    if (typeof webpackConfig === 'function') {
      webpackConfig = webpackConfig();
    }
    var requireConfig = webpackConfig && webpackConfig.resolve;
    if (resolveConfig) {
      Object.keys(resolveConfig).forEach(function (key) {
        if (key === 'packageMains') {
          config.mainFields = resolveConfig[key]
        } else if (key === 'root') {
          config.modules.unshift(resolveConfig[key])
        } else {
          config[key] = resolveConfig[key]
        }
      })
    }
  
    return ResolverFactory.createResolver(config);
  }
  
  function resolveToFile(resolver, name, parentFile) {
      var projectDir = infer.cx().parent.projectDir;
      var fullParent = path.resolve(projectDir, parentFile);
      try {
        return resolver.resolveSync({}, path.dirname(fullParent), name);
      } catch(e) {
        console.log(e.stack)
        return ''
      }
  }
  
  tern.registerPlugin("webpack", function(server, options) {
    var configPath = options.configPath || './webpack.config.js'
    configPath = path.resolve(server.options.projectDir, configPath)
    var resolver = getResolver(configPath)
    server.loadPlugin("commonjs")
    server.loadPlugin("es_modules")
    server.mod.modules.resolvers.push(function (name, parentFile) {
      var resolved = resolveToFile(resolver, name, parentFile)
      return resolved && infer.cx().parent.normalizeFilename(resolved)
    })
  })
  
new_contents: if (typeof exports != "object" || typeof module != "object")
    throw new Error("This plugin works only in a CommonJS environment")
  
  var infer = require("../lib/infer");
  var tern = require("../lib/tern");
  require("./commonjs");
  require("./es_modules");
  
  var fs = require('fs');
  var path = require("path");
  var ResolverFactory = require("enhanced-resolve").ResolverFactory;
  var SyncNodeJsInputFileSystem = require("enhanced-resolve/lib/SyncNodeJsInputFileSystem");
  
  function getResolver(configPath) {
    var config = {
      unsafeCache: true,
      modules: ["node_modules"],
      extensions: [".js", ".jsx", ".json"],
      aliasFields: ["browser"],
      mainFields: ["browser", "web", "browserify", "main"],
      fileSystem: new SyncNodeJsInputFileSystem()
    }
    var webpackConfig = fs.existsSync(configPath) ? require(configPath) : null
    if (typeof webpackConfig === 'function') {
      webpackConfig = webpackConfig()
    }
    var resolveConfig = webpackConfig && webpackConfig.resolve
    if (resolveConfig) {
      Object.keys(resolveConfig).forEach(function (key) {
        if (key === 'packageMains') {
          config.mainFields = resolveConfig[key]
        } else if (key === 'root') {
          config.modules.unshift(resolveConfig[key])
        } else {
          config[key] = resolveConfig[key]
        }
      })
    }
  
    return ResolverFactory.createResolver(config);
  }
  
  function resolveToFile(resolver, name, parentFile) {
      var projectDir = infer.cx().parent.projectDir;
      var fullParent = path.resolve(projectDir, parentFile);
      try {
        return resolver.resolveSync({}, path.dirname(fullParent), name);
      } catch(e) {
        console.log(e.stack)
        return ''
      }
  }
  
  tern.registerPlugin("webpack", function(server, options) {
    var configPath = options.configPath || './webpack.config.js'
    configPath = path.resolve(server.options.projectDir, configPath)
    var resolver = getResolver(configPath)
    server.loadPlugin("commonjs")
    server.loadPlugin("es_modules")
    server.mod.modules.resolvers.push(function (name, parentFile) {
      var resolved = resolveToFile(resolver, name, parentFile)
      return resolved && infer.cx().parent.normalizeFilename(resolved)
    })
  })
  
subject: fix typo