gmail-notifier

A script which sends notifications to your OS when you get a new mail

Installation

Go to Gmail API, create a new app, enable Gmail API and download credentials.json file
Run npm install to generate a token.json file and fetch Unread messages from your mailbox.

Add script as a service

The following steps is applicable only for Linux users. For MacOS and Windows users, multiple answers on the internet show the procedure as well.

Install pm2 which is a production process manager, with the command npm install pm2 -g
Run pm2 start index.js to run index.js in background
To start the script on startup, run pm2 startup systemd
Run the output of the previous step, which should be in the format sudo env PATH=$PATH:/usr/bin /usr/lib/node_modules/pm2/bin/pm2 startup systemd -u <username> --hp /home/<username>

Note: You can change the interval in which the app checks for new messages, which is defaulted to 15 minutes => 900000 miliseconds