Support multiple channel IDs

[glenthomas]

Description

The channel-id input supports a single channel ID. Can this be updated to support multiple comma-separated channel ID's?

What type of issue is this? (place an x in one of the [ ])

• bug
• enhancement (feature request)
• question
• documentation related
• example code related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

[WilliamBergamin]

Hi @glenthomas thanks for writing in!

Supporting an array type for the channel-id property seems like a reasonable feature, I went ahead and labeled the issue as an enhancement.

In the mean time I believe using something like multiple steps in a job could be a valid work around for the issue

on: [push]

jobs:
  new_push_job:
    runs-on: ubuntu-latest
    name: Post to slack channels
    steps:
    - name: Publish to slack channel A via bot token
      id: slack
      uses: slackapi/slack-github-action@v1.21.0
      with:
        channel-id: 'CHANNEL_ID_A'
        slack-message: 'posting from a github action to channel A!'
      env:
        SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
    - name: Publish to slack channel B via bot token
      id: slack
      uses: slackapi/slack-github-action@v1.21.0
      with:
        channel-id: 'CHANNEL_ID_B'
        slack-message: 'posting from a github action to channel B!'
      env:
        SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}

[filmaj]

FYI this has been released in v1.22. Big ups to @treemmett for implementing, adding tests and updating the docs ❤️ .

[amirkarimi]

Thanks! What about message updates. How does it work in this case? I tried passing multiple channels and then updating the messages with the same returned ts. It only updates the message in one of the channels and returns this error: Error: An API error occurred: message_not_found.