How do I set up notifications in CircleCI?

How do I set up notifications in CircleCI?

To set up notifications in CircleCI, you can use the 'notifications' key in your config.yml file.

What types of notifications can I configure?

You can configure notifications for Slack, email, and webhooks, among others.

Can you show me an example of the config.yml for Slack notifications?

Sure! Here's a basic example:

version: 2.1

jobs:
  build:
    docker:
      - image: circleci/python:3.8
    steps:
      - checkout
      - run: echo 'Hello, CircleCI!'

workflows:
  version: 2
  build_and_notify:
    jobs:
      - build:
          filters:
            branches:
              only: main

notifications:
  slack:
    channels:
      - '#your-channel'
    webhook: 'https://hooks.slack.com/services/...'

What if I want to send notifications only on failures?

You can set the 'when' attribute in your notification configuration to 'failure' to achieve that.