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 for me to automatically install all the npm dependencies?

e.g. If foo.js had this:

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

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

to install the dependencies automatically , first of all list them manually in package.json file and run the npm install(sometimes sudo npm install) command. — Lekhnath
– Lekhnath, Commented Mar 2, 2014 at 7:54
Possible duplicate of Is it possible to automatically install the required modules for a node.js script? — Anderson Green
– Anderson Green, Commented Sep 10, 2016 at 1:17

Ayush · Accepted Answer · 2014-03-02 07:36:45Z

15

List your dependencies in a package.json file. You can then run npm install to install all dependencies.

Here's an example of a package.json file. Notice how dependencies are defined:

{
  "name": "best-practices",
  "description": "A package using versioning best-practices",
  "author": "Charlie Robbins <[email protected]>",
  "dependencies": {
    "colors": "0.x.x",
    "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/

edited Mar 2, 2014 at 7:36

answered Mar 2, 2014 at 7:29

Ayush

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1 Comment

sivano Over a year ago

Thank you for the answer and useful link, let me read up on it! I was (naively?) hoping there was a programmatic way to extract the dependencies from the .js file itself. I'll read through the package dependencies link you posted.

Christian Maioli M. · Accepted Answer · 2017-02-10 15:15:03Z

9

There is now a tool that auto-installs required dependencies as you code.

It's called auto-install.

answered Feb 10, 2017 at 15:15

Christian Maioli M.

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Comments

Luca C. · Accepted Answer · 2017-11-23 09:30:34Z

0

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

Note that you should install it globally

answered Nov 23, 2017 at 9:30

Luca C.

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