Is there a way to automatically install node.js dependencies from a .js file?

Question

If I have a foo.js node script, is there a way to automatically install all npm dependencies?

eg. If foo.js had the following:

var program = require('commander'); var cheerio = require('cheerio'); 

Is there any npm command or something that I could do to read foo.js and do the npm install commander; npm install cheerio '?

Answer 1

List your dependencies in the package.json file. Then you can run npm install to install all the dependencies.

Here is an example package.json file. Notice how the dependencies are determined:

 { "name": "best-practices", "description": "A package using versioning best-practices", "author": "Charlie Robbins < [e-mail] >", "dependencies": { "colors": "0.xx", "express": "2.3.x", "optimist": "0.2.x" }, "devDependencies": { "vows": "0.5.x" }, "engine": "node >= 0.4.1" } 

Source: https://blog.nodejitsu.com/package-dependencies-done-right/

Answer 2

Now there is a tool that automatically installs the necessary dependencies when encoding.

It is called auto-install .

Answer 3

npm-install-peers is an npm package that will detect peers and install them.

Please note that you must install it globally