Cannot use slack-message with incoming webhook.

[marcin-lulek-cint]

Can we have support for using slack-message with incoming webhooks. Right now it seems that only payload key is supported.
The reason for this request is that for example for Pull Request notifications we ended up sometimes with malformed JSON object.

[srajiang]

@marcin-lulek-cint - Thanks for the suggestion and for trying out the Slack Github Action! 🎉

I'll mark this as a feature enhancement request and have set it for our next milestone release.

If you have time to make a contribution, we welcome submissions!

[zimeg]

👋 With the latest @2.0.0 release, the provided input payload of incoming webhooks should match other messaging APIs, meaning text and blocks can be used. Reference.

This is a breaking change that replaces slack-message altogether, meaning an updated step might resemble this:

- name: Post a message in a channel
  uses: slackapi/slack-github-action@v2.0.0
  with:
    webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
    webhook-type: incoming-webhook
    payload: |
      text: "And a new message is posted."

I'll close this issue but am of course open to following up with additional ideas or questions! Thanks too for sharing this suggestion!