CODEWITHSUNDEEP
npmgulpnpm-install
user2727195
user2727195

Reputation: 7330

gulp installation global vs. local as dev dependency

From the instructions page of gulp, it's asked to install it globally as well as in the project as dev dependency.

My question is why do we need to install it twice? Why can't the project one use the global one?

and I do get this error prompting to install it locally and I've followed this tutorial as well but still stuck. http://blog.webbb.be/command-not-found-node-npm/

[11:47:51] Local gulp not found in ~/Documents/project
[11:47:51] Try running: npm install gulp

Link-> https://github.com/gulpjs/gulp/blob/master/docs/getting-started.md

Upvotes: 4

Views: 1698

Answers (1)

martin
martin

Reputation: 96889

The error means you didn't install gulp locally. This means you have to add it to your dependencies in package.json (or just call npm i gulp --save).

It needs to be installed locally because gulpfile.js typically runs some code related to gulp. That's why it calls var gulp = require('gulp'); at the top of your gulpfile.js. This call loads gulp from your package node_modules. That's also where functions like gulp.task or gulp.src come from.

At the same you want to easily use gulp in CLI, that's why it needs to be installed also globally so you can run it by just:

$ gulp

Btw, you can also run just your local gulp:

  1. Insert to your package.json:

    "scripts": {
    "gulp": "gulp",
}

    This tells npm that by executing gulp command we want to run script ./node_modules/.bin/gulp.

  2. Run (you'd have to do this in all projects):

    $ npm run gulp

So it's definitely easier to install it globally.

Upvotes: 2

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