Gulp build does not install dependencies automatically? - node.js

Question

I use gulp to build my javascript application. I have some dependencies declared in the package.json file, for example:
"dependencies": {
"flux": "^2.0.1",
"keymirror": "~0.1.0",
"object-assign": "^1.0.0",
"react": "^0.13.1",
"dropzone": "^4.0.1",
"lodash": "^3.6.0"
}
When I run gulp build, it always prompt me some dependency cannot be found unless I manually run npm install lodash for example.
Is there a way to have gulp run npm install automatically?

Answer 1

Run npm install --save-dev command to resolve all dependencies.
Here is link to documentation with --save-dev parameter description: https://docs.npmjs.com/cli/install

Answer 2

You require to have package.json on the root level.
Then once you have to run npm install for all the dependencies with --saveDev(development dependencies) or --save(project level dependencies).
Once this is done, for the next time only run npm install command will install dependent dependencies.

Answer 3

gulp-install would help for your issue. Go to NPM (node package manager) and search for "gulp-install".
The node plugin gulp-install automatically installs packages/dependencies for npm, bower, tsd, and pip. The relative configurations must be found in the gulp file stream.
Example Usage:
In your gulpfile.js:
var install = require("gulp-install");
gulp.src(["./package.json", "./bower.json"])
.pipe(install());