GMail receive then that(Grett)

Usage

$ npx clasp login
$ npx clasp create --rootDir ./src
$ npx clasp -P src/ push

Setup GAS

$ npx clasp -P src/ open

• Set your SHEET_ID and SLACK_INCOMING_WEBHOOK_URL to Project property

Setup GMail search operator

• Make config sheet on a spreadsheet of SHEET_ID set to GAS property.
• Set operator value to A2 cell in config sheet.
  

See more about GMail search operators => https://support.google.com/mail/answer/7190

Set trigger

Set trigger schedule as you like.

e.g. trigger per 10 minutes