Speed up your npm install operations by caching locally the result.
NPM already has a cache but it will rebuild stuff after is copied from cache.
Install
npm i -g jfromaniello/npm-preserve
Usage
#restore or install from scratch
npm-preserve-restore || npm install
# npm test ..etc
#cache the stuff after you are done
npm-preserve-cache
# npm prune --production
# deploy
How it works
npm-preserve-cache computes an md5 hashsum of package.json's devDepdencies and dependencies plus all the content npm-shrinkwrap. Then it stores the node_modules directory in the current dir as /tmp/project-name-HASHSUM.tar.gz.
npm-preserve-restore computes an md5 hashsum of package.json's devDepdencies and dependencies plus all the content npm-shrinkwrap. Then it search the tar.gz file named /tmp/project-name-HASHSUM.tar.gz if this file exists, it will restore node_modules from this file and exit with status code 0, if it doesn't exists it will return code 1.
project-name in the file name is the name of the package.json in the current directory.
npm-preserve-cache and npm-preserve-restore uses /tmp as default caching directory, you could also use a different directory with:
npm-preserve-cache /foo/bar
npm-preserve-restore /foo/bar
License
MIT 2016 - José F. Romaniello