Slack integration for Google Cloud Build, using Google Cloud Functions to post messages to Slack when a build reaches a specific state.

• Create a Slack app, and copy the webhook URL:

export SLACK_WEBHOOK_URL=my-slack-webhook-url

• Set the PROJECT_ID variable:

export PROJECT_ID=my-project-id

• [Optionally] Set a specific BUCKET_NAME and a FUNCTION_NAME.
• [Optionally] Set the status you want a message for, here are the default ones:

export GC_SLACK_STATUS="SUCCESS FAILURE TIMEOUT INTERNAL_ERROR"

• Create the function:

. ./setup.sh
# OR
npm run setup

The teardown script will delete the function FUNCTION_NAME, and the bucket BUCKET_NAME.

. ./teardown.sh
# OR
npm run teardown

Each build invokes 3 times the function:

• when the build is queued
• when the build starts
• when the build reaches a final status.

Here is the GCF pricing for calculation.

Yes, specify the BUCKET_NAME:

exports BUCKET_NAME=my-bucket

If you use the setup script with the same FUNCTION_NAME, it will update the existing function.

After creating an application on Slack, active the Incoming Webhooks. You'll find the url on that page:

In the case where a BUCKET_NAME is not defined, a random one is generated. And in order to delete it during the teardown, the variable has to be exported from the setup script.