Simple downward to get a package version for Carvel kapp-controller

package-format.yaml

---
apiVersion: packaging.carvel.dev/v1alpha1
kind: PackageInstall
metadata:
  name: simple-app
  namespace: common-install
spec:
  serviceAccountName: common-sa
  packageRef:
    refName: simple.app.example.com
    versionSelection:
      constraints: 1.0.0
---
apiVersion: data.packaging.carvel.dev/v1alpha1
kind: Package
metadata:
  name: "simple.app.example.com.1.0.0"
  namespace: common-install
spec:
  refName: simple.app.example.com
  version: 1.0.0
  releaseNotes: |
        Initial release of the simple app package
  template:
    spec:
      fetch:
        - inline:
            paths:
              dir/file.yaml: |
                #@ load("@ytt:data", "data")

                apiVersion: v1
                kind: ConfigMap
                metadata:
                  name: simple-configmap
                  namespace: default
                data:
                  version: #@ data.values.packageVersion

      template:
        - ytt:
            valuesFrom:
              - downwardAPI:
                  items:
                  - name: packageVersion
                    fieldPath: "metadata.annotations['packaging\\.carvel\\.dev/package-version']"
      deploy:
        # use kapp to deploy resources
        - kapp: {}

simple-app-result.yaml

apiVersion: kappctrl.k14s.io/v1alpha1
kind: App

metadata:
  name: simple-app
  namespace: common-install
  annotations:
    packaging.carvel.dev/package-ref-name: simple.app.example.com
    packaging.carvel.dev/package-version: 1.0.0
spec:
  serviceAccountName: common-sa
  fetch:
    - inline:
        paths:
          dir/file.yaml: |
            #@ load("@ytt:data", "data")

            apiVersion: v1
            kind: ConfigMap
            metadata:
              name: simple-configmap
              namespace: default
            data:
              version: #@ data.values.packageVersion

  template:
    - ytt:
        valuesFrom:
          - downwardAPI:
              items:
              - name: packageVersion
                fieldPath: "metadata.annotations['packaging\\.carvel\\.dev/package-version']"
  deploy:
    # use kapp to deploy resources
    - kapp: {}