node.js 更改 node_modules 位置
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Change node_modules location
提问by M K
Is there a way to change the node_modules folder location?
有没有办法更改 node_modules 文件夹位置？
For example:
例如：
- dir1
- dir2
- node_modules
to:
到：
- dir1
- dir2
- node_modules
采纳答案by Amol M Kulkarni
The following is the code which looks int the node_modulesfolder by default
以下是node_modules默认情况下在文件夹中查找的代码
Module.prototype.load = function(filename) {
debug('load ' + JSON.stringify(filename) +
' for module ' + JSON.stringify(this.id));
assert(!this.loaded);
this.filename = filename;
this.paths = Module._nodeModulePaths(path.dirname(filename));
var extension = path.extname(filename) || '.js';
if (!Module._extensions[extension]) extension = '.js';
Module._extensions[extension](this, filename);
this.loaded = true;
};
So, following is the exact search pattern:
因此，以下是确切的搜索模式：
Node.JSlooks to see if the given module is a core module. (e.g.
http,fs, etc.) Always takes the precedence in the loading modules.If the given module is not a core modules(e.g.
http,fs, etc.), Node.js will then begin to search for a directory named,node_modules.It will start in the current directory (relative to the currently-executing file in Node.JS) and then work its way up the folder hierarchy, checking each level for a node_modules folder. Once Node.JSfinds the
node_modulesfolder, it will then attempt to load the given module either as a (.js) JavaScript file or as a named sub-directory; if it finds the named sub-directory, it will then attempt to load the file in various ways. So, for exampleIf you make a request to load the module, "utils" and its a directory not a .js file then:
Node.JSwill search a hierarchical directory fornode_modulesandutilsin the following ways:./node_modules/utils.js ./node_modules/utils/index.js ./node_modules/utils/package.jsonIf Node.JSstill can't find the file in above steps, Node.js will then start to look into the directory paths from environment variables i.e.
NODE_PATHset on your machine(obviously set by Node.JS installer file if you are on windows) Not Found in all the above steps then, prints a stack trace to stder
E.g.:Error:Cannot find module 'yourfile'
For more information: link is hereeven the cyclic require()is explained very well..
Node.JS查看给定的模块是否是核心模块。（例如
http，fs等）在加载模块中始终具有优先权。如果给定的模块不是核心模块（例如
http，，fs等），Node.js 将开始搜索名为，的目录node_modules。它将从当前目录开始（相对于Node.JS 中当前正在执行的文件），然后在文件夹层次结构中向上工作，检查 node_modules 文件夹的每个级别。一旦Node.JS找到该
node_modules文件夹，它就会尝试将给定的模块加载为 (.js) JavaScript 文件或命名的子目录；如果找到指定的子目录，它将尝试以各种方式加载文件。所以，例如如果您的请求加载模块“utils的”，其目录不是一个.js文件，然后：
node.js的将搜索分层目录node_modules，并utils在以下几个方面：./node_modules/utils.js ./node_modules/utils/index.js ./node_modules/utils/package.json如果Node.JS在上述步骤中仍然找不到文件，Node.js 将开始查看环境变量中的目录路径，即
NODE_PATH在您的机器上设置（如果您在 Windows 上，显然由 Node.JS 安装程序文件设置）在所有然后上述步骤没有找到，将打印一个堆栈跟踪stder
例如 ：有关更多信息：链接在这里，甚至循环 require()也得到了很好的解释..Error:Cannot find module 'yourfile'
回答by mohu
In fact, we can even edit the nodevars.batfile in which the last line is:
事实上，我们甚至可以编辑nodevars.bat最后一行所在的文件：
if "%CD%\"=="%~dp0" cd /d "%HOMEDRIVE%%HOMEPATH%"
if "%CD%\"=="%~dp0" cd /d "%HOMEDRIVE%%HOMEPATH%"
We can specify our own directory instead of looking after the user's home directory:
我们可以指定我们自己的目录而不是照看用户的主目录：
%HOMEDRIVE%%HOMEPATH%
%HOMEDRIVE%%HOMEPATH%
so that node-modules-location will automatically looked after.
这样 node-modules-location 将自动得到照顾。
