prerelease-notification.yml

name: Prerelease Notification

on:
  workflow_dispatch:
  push:
    tags:
      - 'lantern-[0-9]+.[0-9]+.[0-9]+-**'

jobs:
  create-release:
    runs-on: ubuntu-latest
    steps:
    - name: Check if release already exists
      id: exists
      env:
        GH_TOKEN: ${{ github.token }}
      run: |
         echo EXISTING=$(gh api \
           -H "Accept: application/vnd.github+json" \
           -H "X-GitHub-Api-Version: 2022-11-28" \
           /repos/${{ github.repository }}/releases \
           | jq -r '.[].tag_name' | grep -c "${{ github.ref_name }}") >> "$GITHUB_OUTPUT"

    - name: Strip repository name of owner
      if: ${{ steps.exists.outputs.EXISTING < 1 }}
      id: repo
      run: |
        echo "REPO_NAME=$(echo ${{ github.repository }} | sed s/'${{ github.repository_owner }}\/'//g)" >> "$GITHUB_OUTPUT"
        
    - name: Send Slack message to Releases channel
      if: ${{ steps.exists.outputs.EXISTING < 1 }}
      run: |
        curl -X POST -H 'Content-type: application/json' \
          --data "{\"platform\": \"${{ steps.repo.outputs.REPO_NAME }}\", \"version\": \"${{ github.ref_name }}\"}" \
          ${{ secrets.SLACK_RELEASES_WEBHOOK }}