Slack Notify - GitHub Action

A GitHub Action to send a message to a Slack channel. This action is a part of GitHub Actions Library created by rtCamp

Changes:

1. It configured to get webhook from google secrets. To do this it needs ENV variables called GCP_CREDENTIALS with GCP SA JSON. You will get error message if you don't specify GCP_CREDENTIALS.
2. You can specify JOB_STATUS to send notification accordingly to workflow event. In other case if this variable not used it will send started build message.

Usage

You can use this action after any other action. Here is an example setup of this action:

1. Create a .github/workflows/slack-notify.yml file in your GitHub repo.
2. Add the following code to the slack-notify.yml file.

on: push
name: Slack Notification Demo
jobs:
  slackNotification:
    name: Slack Notification
    runs-on: ubuntu-latest
    steps:
    - name: Slack Notification
      uses: skindar/action-slack-notify@master
      env:
        GCP_CREDENTIALS: ${{ secrets.GOOGLE_APPLICATION_CREDENTIALS }}
        JOB_STATUS: ${{ job.status }}

3. Create SLACK_WEBHOOK secret using GitHub Action's Secret. You can generate a Slack incoming webhook token from here.

Environment Variables

By default, action is designed to run with minimal configuration. It specify message according to github workflow event. Look code bellow

export SLACK_MESSAGE_SUCCESS="$GITHUB_REPOSITORY build: Success :the_horns:"
export SLACK_MESSAGE_STARTED="$GITHUB_REPOSITORY build: Started :clapper:"
export SLACK_MESSAGE_CANCELLED="$GITHUB_REPOSITORY build: Cancelled: :eyes:"
export SLACK_MESSAGE_FAILURE="$GITHUB_REPOSITORY build: Failure: :boom:"
export SLACK_COLOR_SUCCESS="#6aa84f"
export SLACK_COLOR_STARTED="#0074D9"
export SLACK_COLOR_CANCELLED="#cccccc"
export SLACK_COLOR_FAILURE="#ff0000"

if [[ -z "$JOB_STATUS" ]]; then
    export SLACK_MESSAGE=$SLACK_MESSAGE_STARTED
    export SLACK_COLOR=$SLACK_COLOR_STARTED
else
    MSG=SLACK_MESSAGE_$(echo $JOB_STATUS | tr a-z A-Z )
    MSG_COLOR=SLACK_COLOR_$(echo $JOB_STATUS | tr a-z A-Z )
    export SLACK_MESSAGE=${!MSG}
	export SLACK_COLOR=${!MSG_COLOR}
fi