Set of utility functions to be used with Google Scripts and deployed using Google's Clasp tool

This is based upon the Gist from This post about Google Scripts.

It's responsibility is to:

• Look for Google email threads in your Inbox that include the auto-archive label.
• It will then attempt to find a retention/<N> tag on the threads
• If the thread's last activity is older than <N> days ago, it will then archive your message.

• I have created 2 filters for from: [email protected] in my Google account.
  • The first filter adds the auto-archive label
  • Second filter add retention/7 label
• Scheduled the execution of the emailArchiver function to run with a Daily Trigger. This can be done by opening the Project Overview clicking on the ... under Project Details -> Triggers -> + Add Trigger in the lower right

• I don't think it's possible to apply 2 labels to the messages as they come in with one filter. The API does allow one to lookup all of the GmailLabels a user has on their account, this would be another way of handling this processing
• Arrays (ex: GmailLabels[]) in the Script Console seems to be missing the find method.
• Clasp's .claspignore does not seem to do the trick of properly respecting/ignoring the files we would like, hence the npm run push hack

• Find a way to create helper functions that will not interfere with the processing
  • Create a groupBy function for arrays to allow for easier GmailThread => ThreadsByLabel map