# Tekton Task to Detect Changed Services
# This task analyzes git changes to determine which services need to be built

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: detect-changed-services
  namespace: {{ .Values.namespace }}
  labels:
    app.kubernetes.io/name: {{ .Values.labels.app.name }}
    app.kubernetes.io/component: detection
spec:
  workspaces:
    - name: source
      description: Workspace containing the source code
  results:
    - name: changed-services
      description: Comma-separated list of changed services
  steps:
    - name: detect-changes
      image: alpine/git
      script: |
        #!/bin/bash
        set -e
        
        cd $(workspaces.source.path)
        
        # Get the list of changed files
        CHANGED_FILES=$(git diff --name-only HEAD~1 HEAD 2>/dev/null || git diff --name-only $(git rev-parse --abbrev-ref HEAD)@{upstream} HEAD 2>/dev/null || echo "")
        
        if [ -z "$CHANGED_FILES" ]; then
          # No changes detected, assume all services need building
          echo "No git changes detected, building all services"
          echo "all" > $(results.changed-services.path)
          exit 0
        fi
        
        # Extract service names from changed file paths
        CHANGED_SERVICES=$(echo "$CHANGED_FILES" | grep -o 'services/[^/]*' | sed 's/services\/\//' | sort -u | tr '\n' ',' | sed 's/,$//')
        
        if [ -z "$CHANGED_SERVICES" ]; then
          # Changes are in infrastructure or other non-service files
          echo "infrastructure" > $(results.changed-services.path)
        else
          echo "$CHANGED_SERVICES" > $(results.changed-services.path)
        fi