Bash script to enable your public ip to access the project configured locally with gcloud

allow_my_public_ip.sh

#!/bin/bash

# Bash script to enable your public ip to access the project configured locally with gcloud.
# If a rule already exists associated with this principal(set up as the description on creation time),
# the existing rule is updated instead of creating a new rule.
# You need to have gcloud installed and initialized with your principal and corresponding project you want to access to.
# A security policy with the name defined under the POLICY_NAME variable above must exist already in the project

# Input parameters
PRINCIPAL=$(gcloud auth list --filter=status:ACTIVE --format='value(ACCOUNT)')
POLICY_NAME='allowed-ips'
RANDOM_PRIORITY=$((1000 + RANDOM % 1000000))
MY_IP=$(curl -s ifconfig.me)

# Get the priority of the rule associated with the principal, if it exists
PRIORITY=$(gcloud compute security-policies describe $POLICY_NAME --format=json| jq ".[].rules[]| select(.description==\"$PRINCIPAL\") | .priority")

# If a match is not found, then a new rule neds to be created with random priority
if [ -z "${priority}" ]; then
  gcloud compute security-policies rules create $RANDOM_PRIORITY \
    --security-policy $POLICY_NAME \
    --src-ip-ranges "$MY_IP" \
    --action ALLOW \
    --description=$PRINCIPAL
else
# If a match is found, then update the existing rule
  gcloud compute security-policies rules update $PRIORITY \
    --security-policy $POLICY_NAME \
    --src-ip-ranges "$MY_IP" \
    --action ALLOW \
    --description=$PRINCIPAL
fi