gcp_notification_func.sh

################################################################################
#############            GCP Notification Function                ##############
################################################################################

#!/bin/bash

#Help Funtion showing script usage
Help()
{
   echo "Bash Script for utilising GCP notification functionality"
   echo ""
   echo "Basic Usage, using default parameters: ./gcp_notification_func "
   echo "Usage: ./gcp_notification_func [--b|--e|--t|--tr|-g|--bu|--sT|--mT|--h]"
   echo ""
   echo "Options:"
   echo "$1 GCP Storage Bucket name"
   echo "$2 GCP PubSub Topic name"
   echo "$3 GCP PubSub Subscription name"
   echo "$4 Path to source directory for notification function"
   echo "$5 Destination email that will be notified"
   echo "$6 Less secure source email where results will be sent from"
   echo "$7 Password for SMTP client for source email"
   echo "$8 GCP Cloud Function Name"
   echo "$9 GCP Cloud Function runtime version"
   echo ""
   exit
}

#import environment variables from secrets script that stores sensitive GCP values
source config/secrets.sh
#############################################################
#####                 secrets.sh                         ####
#!/usr/bin/env bash

# export PROJECT_ID=""
# export BUCKET=""
# export JOB_DIR=""
# export REGION=""
# export TOPIC=""
# export SUBSCRIPTION=""
# export SOURCE_DIR=""
# export TOMAIL=""
# export FROMMAIL=""
# export EMAIL_PASS=""

#############################################################

### Only need to run this script once before calling gcp_training script ###

echo ""
echo "Notification Function Arguments"
echo "#########################"
echo 'Function Name: '$FUNCTION_NAME
echo 'BUCKET NAME: ' $BUCKET
echo 'TOPIC: ' $TOPIC
echo 'SUBSCRIPTION: ' $SUBSCRIPTION
echo 'SOURCE_DIR: ' $SOURCE_DIR
echo 'TOMAIL: ' $TOMAIL
echo 'FROMMAIL: ' $FROMMAIL
echo 'EMAIL_PASS: ' $EMAIL_PASS
echo "#########################"
echo ""

#update any gcloud components
#yes | gcloud components update

#listing existing pubsub topics
gcloud pubsub topics list

#delete topic if already exists
gcloud pubsub topics delete $TOPIC  #* may get error if topic doesn't exist but will not halt execution

#create pubsub topic
gcloud pubsub topics create $TOPIC

#delete pubsub subscription if already exists
gcloud pubsub subscriptions delete $SUBSCRIPTION #* may get error if subscription doesn't exist but will not halt execution

#create subscription to topic
gcloud pubsub subscriptions create $SUBSCRIPTION \
   --topic=$TOPIC

#list bucket notifications
gsutil notification list $BUCKET_NAME

#delete bucket notifications
gsutil notification delete $BUCKET_NAME #* may get error if notification doesn't exist but will not halt execution

#delete gcloud function if exists (need to enable Cloud Build API)
gcloud functions delete $FUNCTION_NAME #* may get error if function doesn't exist but will not halt execution

#deploy gcloud function
gcloud functions deploy $FUNCTION_NAME \
    --source $SOURCE_DIR \
    --runtime $RUNTIME_VERSION \
    --trigger-topic $TOPIC \
    --set-env-vars BUCKET=$BUCKET_NAME,EMAIL_USER=$TOMAIL,FROM_MAIL=$FROMMAIL,EMAIL_PASS=$EMAIL_PASS \
    --allow-unauthenticated