我想要求我的文件总是通过我的项目的根,而不是相对于当前模块。

例如,如果查看https://github.com/visionmedia/express/blob/2820f2227de0229c5d7f28009aa432f9f3a7b5f9/examples/downloads/app.js第6行,您将看到

express = require('../../')

在我看来,这真的很糟糕。假设我想让我所有的例子都只靠近根结点一层。这是不可能的,因为我必须更新超过30个例子,并且在每个例子中更新很多次。:

express = require('../')

我的解决方案是有一个基于根的特殊情况:如果字符串以$开头,那么它相对于项目的根文件夹。

任何帮助都是感激的,谢谢

更新2

现在我使用require.js,它允许你以一种方式编写,在客户端和服务器上都可以工作。Require.js还允许你创建自定义路径。

更新3

现在我转移到webpack + gulp,我使用enhanced-require来处理服务器端模块。看这里的基本原理:http://hackhat.com/p/110/module-loader-webpack-vs-requirejs-vs-browserify/


当前回答

如果你使用ES5语法,你可以使用asapp。对于ES6,你可以使用babel-plugin-module-resolver,使用如下配置文件:

.babelrc

{
  "plugins": [
    ["module-resolver", {
      "root": ["./"],
      "alias": {
        "app": "./app",
        "config": "./app/config",
        "schema": "./app/db/schemas",
        "model": "./app/db/models",
        "controller": "./app/http/controllers",
        "middleware": "./app/http/middleware",
        "route": "./app/http/routes",
        "locale": "./app/locales",
        "log": "./app/logs",
        "library": "./app/utilities/libraries",
        "helper": "./app/utilities/helpers",
        "view": "./app/views"
      }
    }]
  ]
}

其他回答

我认为你不需要用你描述的方式来解决这个问题。如果您想在大量文件中更改相同的字符串,请使用sed。在你的例子中,

find . -name "*.js" -exec sed -i 's/\.\.\/\.\.\//\.\.\//g' {} +

/../变成了../

或者,您可以要求配置文件存储包含库路径的变量。如果您将以下文件存储为config.js在示例目录中

var config = {};
config.path = '../../';

在你的例子文件中

myConfiguration = require('./config');
express = require(config.path);

您将能够从一个文件控制每个示例的配置。

这只是个人喜好。

如果你使用ES5语法,你可以使用asapp。对于ES6,你可以使用babel-plugin-module-resolver,使用如下配置文件:

.babelrc

{
  "plugins": [
    ["module-resolver", {
      "root": ["./"],
      "alias": {
        "app": "./app",
        "config": "./app/config",
        "schema": "./app/db/schemas",
        "model": "./app/db/models",
        "controller": "./app/http/controllers",
        "middleware": "./app/http/middleware",
        "route": "./app/http/routes",
        "locale": "./app/locales",
        "log": "./app/logs",
        "library": "./app/utilities/libraries",
        "helper": "./app/utilities/helpers",
        "view": "./app/views"
      }
    }]
  ]
}

如果你的应用程序的入口点js文件(即你实际运行“node”的文件)在你的项目根目录下,你可以很容易地用rootpath npm模块做到这一点。只需通过

npm install --save rootpath

...然后在入口点js文件的最上面,添加:

require('rootpath')();

从那时起,所有的require调用现在都相对于项目根——例如require('../../../config/debugging/log');就要求(“配置/调试/日志”);(其中配置文件夹在项目根目录下)。

这是我六个多月来的实际做法。我在项目中使用一个名为node_modules的文件夹作为我的根文件夹,这样它将始终从我调用绝对require的任何地方查找该文件夹:

node_modules myProject index.js我可以require("myProject/someFolder/hey.js")而不是require("./someFolder/hey.js") 包含hey.js的someFolder

当你被嵌套到文件夹中时,这更有用,如果以绝对方式设置,更改文件位置的工作要少得多。我在整个应用程序中只使用了2个相对要求。

在Browserify手册中有一个非常有趣的章节:

avoiding ../../../../../../.. Not everything in an application properly belongs on the public npm and the overhead of setting up a private npm or git repo is still rather large in many cases. Here are some approaches for avoiding the ../../../../../../../ relative paths problem. node_modules People sometimes object to putting application-specific modules into node_modules because it is not obvious how to check in your internal modules without also checking in third-party modules from npm. The answer is quite simple! If you have a .gitignore file that ignores node_modules: node_modules You can just add an exception with ! for each of your internal application modules: node_modules/* !node_modules/foo !node_modules/bar Please note that you can't unignore a subdirectory, if the parent is already ignored. So instead of ignoring node_modules, you have to ignore every directory inside node_modules with the node_modules/* trick, and then you can add your exceptions. Now anywhere in your application you will be able to require('foo') or require('bar') without having a very large and fragile relative path. If you have a lot of modules and want to keep them more separate from the third-party modules installed by npm, you can just put them all under a directory in node_modules such as node_modules/app: node_modules/app/foo node_modules/app/bar Now you will be able to require('app/foo') or require('app/bar') from anywhere in your application. In your .gitignore, just add an exception for node_modules/app: node_modules/* !node_modules/app If your application had transforms configured in package.json, you'll need to create a separate package.json with its own transform field in your node_modules/foo or node_modules/app/foo component directory because transforms don't apply across module boundaries. This will make your modules more robust against configuration changes in your application and it will be easier to independently reuse the packages outside of your application. symlink Another handy trick if you are working on an application where you can make symlinks and don't need to support windows is to symlink a lib/ or app/ folder into node_modules. From the project root, do: ln -s ../lib node_modules/app and now from anywhere in your project you'll be able to require files in lib/ by doing require('app/foo.js') to get lib/foo.js. custom paths You might see some places talk about using the $NODE_PATH environment variable or opts.paths to add directories for node and browserify to look in to find modules. Unlike most other platforms, using a shell-style array of path directories with $NODE_PATH is not as favorable in node compared to making effective use of the node_modules directory. This is because your application is more tightly coupled to a runtime environment configuration so there are more moving parts and your application will only work when your environment is setup correctly. node and browserify both support but discourage the use of $NODE_PATH.