GitHub Action for Slack Incoming Webhook

Feature

• Send a message using Incoming Webhooks on Slack App
  • Don't use legacy incoming Webhooks on custom integrations
• You can use the names of the fields in the Message payloads provided by Slack
  • https://api.slack.com/reference/messaging/payload

Simple Usage

- name: Slack Notification
  uses: tokorom/action-slack-incoming-webhook@main
  env:
    INCOMING_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
  with:
    text: Hello, Slack!

Here's what the Slack message would look like:

Advanced Usages

• You can flexibly specify attachments and blocks
  • https://api.slack.com/reference/messaging/attachments
  • https://api.slack.com/reference/block-kit/blocks

- name: Set COMMIT_MESSAGE
    run: echo "COMMIT_MESSAGE=${{ github.event.head_commit.message }}" | tr '\n' ' ' >> $GITHUB_ENV
- name: Slack Notification on SUCCESS
  if: success()
  uses: tokorom/action-slack-incoming-webhook@main
  env:
    INCOMING_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
  with:
    text: Successfully automated deployment.
    attachments: |
      [
        {
          "color": "good",
          "author_name": "${{ github.actor }}",
          "author_icon": "${{ github.event.sender.avatar_url }}",
          "fields": [
            {
              "title": "Commit Message",
              "value": "${{ github.event.head_commit.message }}"
            },
            {
              "title": "GitHub Actions URL",
              "value": "${{ github.event.repository.url }}/actions/runs/${{ github.run_id }}"
            },
            {
              "title": "Compare URL",
              "value": "${{ github.event.compare }}"
            }
          ]
        }
      ]

Here's what the Slack message would look like:

Change the icon

You can change the icon for a Slack message in the Slack App settings.

Slack's new Incoming Webhooks do not allow API payloads to override the icon.

• Open Your Apps page
• Select your app for Incoming Webhooks
• Select Basic Information > Display Information
• Set any icon you like!