- THIS IS NOT PRODUTION CODE. 
- YOU ARE RESPONSIBLE IF YOU CHOOSE TO RUN THIS.

This script replaces GCP billing account association for all projects associated to a particular billing account to a new one

First, check that the list of projects is what you expect, no action taken on those projects:

1. comment line 24 and run
   1. ./change-projects-billing.sh OLD_BILLING_ACC_ID=xxx-xxx-xxx-xxx NEW_BILLING_ACC_ID=yyy-yyy-yyy-yyy | tee change-projects-billing.log 2>&1
   2. go through the log to make sure the projects are there

Second, check that you have the appropriate IAM rights by attaching 1 single project:

2. export NEW_BILLING_ACC_ID="yyy-yyy-yyy-yyy"
   1. export project="test-project-id-that-you-want-to-use"
   2. copy line 24 and execute by itself * in the command line * (so you don't run the script)

Third - real run

3. uncomment line 24 and run script using command at 1.1