spring-announce-milestone-planning.yml

name: Announce Milestone Planning in Chat

# Must be used for `on:  milestone: types: [created, edited]` GH events, and repo must have `SPRING_RELEASE_CHAT_WEBHOOK_URL` secret

on:
  workflow_call:
    secrets:
      SPRING_RELEASE_CHAT_WEBHOOK_URL:
        required: true

jobs:
  announce-milestone-planning:
    runs-on: ubuntu-latest
    if: github.event.milestone.due_on
    steps:
      - run: |
          dueDate=${{ github.event.milestone.due_on }} 
          dueDate=${dueDate%T*}
          changesDueOn=${{ github.event.changes.due_on.from }}
          changesDueOn=${changesDueOn%T*}
          
          if [ '${{ github.event.action }}' = 'edited' -a  '$changesDueOn' = '$dueDate' ]
          then
            exit 0
          fi
           
          if [ $dueDate = $(date '+%F') ]
          then
            dueDate=today
          else
            dueDate="on $(date -d $dueDate '+%B %d')"
          fi
          
          curl -X POST '${{ secrets.SPRING_RELEASE_CHAT_WEBHOOK_URL }}' -H 'Content-Type: application/json' \
            -d '{ text: "${{ github.event.repository.name }}-planning `${{ github.event.milestone.title }}` '"$dueDate"'"}'