Example of a Github Actions workflow that gets the name of the services from the folder structure and file changes in the commit when a PR is merged.

scan_changed_files_gha.yaml

name: Scan Changed Files in PR

on:
  pull_request:
    types:
      - closed
    branches: 
      - 'main'

jobs:
  scan:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v2
      with: 
        fetch-depth: 50 # pick an appropriate number
    - name: Get list of changed files
      id: getfile
      run: |
        files=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }} --)
        echo "Changed files: $files"
        echo "Changed files: $files" >> changed_files.txt

    - name: Identify affected services
      id: services
      run: |
        services=""
        while read -r file; do
          service=$(echo $file | awk -F'/' '{print $1}')
          services="$services $service"
        done < changed_files.txt
        unique_services=$(echo $services | xargs -n1 | sort -u | xargs)
        echo "Affected services: $unique_services"
        echo "::set-output name=affected_services::$unique_services"

    - name: Post affected services
      run: |
        json_payload=$(jq -n \
          --arg github_pull_id ${{ github.event.pull_request.id }} \
          --arg services '[${{ steps.services.outputs.affected_services }}]' \
          '{
             github_pull_id: $github_pull_id,
             services: $services
           }')

        curl -X POST \
          http://yourinstance.getdx.net/api/deployments.setPullServices \
          -H "Content-Type: application/json" \
          -H "Authorization: Bearer YOUR_BEARER_TOKEN_HERE" \
          -d "$json_payload"

        if [ "$RESPONSE_CODE" -ne 200 ]; then
          ERROR_MESSAGE=$(jq -r '.message' response.txt)
          ERROR_TYPE=$(jq -r '.error' response.txt)

          echo "Error response from API: HTTP status code $RESPONSE"
          echo "Error type: $ERROR_TYPE"
          echo "Error message: $ERROR_MESSAGE"

          exit 1 # Fail the step explicitly if an error is detected 
        fi