ℙℕℤℝ 2012-03-13 07:31
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如何在节点模块中使用本地安装的包?

How do I use a local version of a module in node.js. For example, in my app, I installed coffee-script:

npm install coffee-script

This installs it in ./node_modules and the coffee command is in ./node_modules/.bin/coffee. Is there a way to run this command when I'm in my project's main folder? I guess I'm looking for something similar to bundle exec in bundler. Basically, I'd like to specify a version of coffee-script that everyone involved with the project should use.

I know I can add the -g flag to install it globally so coffee works fine anywhere, but what if I wanted to have different versions of coffee per project?

转载于:https://stackoverflow.com/questions/9679932/how-to-use-package-installed-locally-in-node-modules

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  • hurriedly% 2013-03-01 12:06
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    UPDATE: As Seyeong Jeong points out in their answer below, since npm 5.2.0 you can use npx [command], which is more convenient.

    OLD ANSWER for versions before 5.2.0:

    The problem with putting

    ./node_modules/.bin
    

    into your PATH is that it only works when your current working directory is the root of your project directory structure (i.e. the location of node_modules)

    Independent of what your working directory is, you can get the path of locally installed binaries with

    npm bin
    

    To execute a locally installed coffee binary independent of where you are in the project directory hierarchy you can use this bash construct

    PATH=$(npm bin):$PATH coffee
    

    I aliased this to npm-exec

    alias npm-exec='PATH=$(npm bin):$PATH'
    

    So, now I can

    npm-exec coffee
    

    to run the correct copy of coffee no matter of where I am

    $ pwd
    /Users/regular/project1
    
    $ npm-exec which coffee
    /Users/regular/project1/node_modules/.bin/coffee
    
    $ cd lib/
    $ npm-exec which coffee
    /Users/regular/project1/node_modules/.bin/coffee
    
    $ cd ~/project2
    $ npm-exec which coffee
    /Users/regular/project2/node_modules/.bin/coffee
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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