ipfs-add-from-url
A command line executable to add a file to IPFS from a URL instead of a file path
Dependency
Make sure IPFS is installed and the daemon running
ipfs daemon
Install
Globally
npm install -g ipfs-add-from-url# Use anywhere ipfs-add-from-url https://inventaire.io/public/icon/120.png
In a project
npm install ipfs-add-from-url --save# Use directly from npm scripts ipfs-add-from-url https://inventaire.io/public/icon/120.png# Or using the relative path from the command line ./node_modules/.bin/ipfs-add-from-url https://inventaire.io/public/icon/120.png
Alternative
As suggested by ftnd33, you can do pretty much the same with
wget -q -O - http://url.tld | ipfs add -q