close-milestone.yml

# Description
# ===========
# This workflow is triggered each time the Java CI workflow succeeds
# on master.
# It looks for a milestone that is completed and close it.
---
name: Close Milestone

on:
  workflow_run:
    workflows: ["Java CI"]
    branches: [master]
    types: 
      - completed

jobs:
  close:
    name: Close completed milestone
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    steps:
      - name: Close a milestone if completed
        run: |
          milestones=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              https://api.github.com/repos/${{ github.repository }}/milestones \
            | jq -r '. | map(select(.open_issues == 0 and .closed_issues > 0 and .state == "open"))')
          if [ "$milestones" != "[]" ]
          then
            milestone_number=$(echo "$milestones" | jq -r '.[0].number')
            curl -s \
              -X PATCH \
              -H "Authorization: token ${GITHUB_TOKEN}" \
              -H "Accept: application/vnd.github.v3+json" \
              https://api.github.com/repos/${{ github.repository }}/milestones/${milestone_number} \
              -d '{"state":"closed"}'
          fi
        env:
          # Personal access tokens should be generated from https://github.com/settings/tokens with repository scope
          GITHUB_TOKEN: ${{ secrets.REPO_SCOPED_TOKEN }}