add policy-generator component (#251)

openshift-gitops-operator/instance/components/kustomize-build-enable-helm/README.md

@@ -19,3 +19,11 @@ resources:
 components:
   - ../../components/kustomize-build-enable-helm
 ```
+
+## Known Incompatibilities
+
+### kustomize-build-policy-generator
+
+This component is not compatible with the [kustomize-build-policy-generator](openshift-gitops-operator/instance/components/kustomize-build-policy-generator) component.
+
+Both components are attempting to patch the `spec.kustomizeBuildOptions` field.

openshift-gitops-operator/instance/components/kustomize-build-policy-generator/README.md

@@ -0,0 +1,29 @@
+# kustomize-build-policy-generator
+
+## Purpose
+This component is designed to turn on the `--enable-helm` feature of `kustomize build` in ArgoCD to support helm charts inside of a kustomization.yaml file.
+
+To learn more about the `--enable-helm` feature, refer to the ArgoCD docs [here](https://argo-cd.readthedocs.io/en/stable/user-guide/kustomize/#kustomizing-helm-charts) or the kustomize [examples](https://github.com/kubernetes-sigs/kustomize/blob/master/examples/chart.md).
+
+## Usage
+
+This component can be added to a base by adding the `components` section to your overlay `kustomization.yaml` file:
+
+```
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - ../../base
+
+components:
+  - ../../components/kustomize-build-policy-generator
+```
+
+## Known Incompatibilities
+
+### kustomize-build-enable-helm
+
+This component is not compatible with the [kustomize-build-enable-helm](openshift-gitops-operator/instance/components/kustomize-build-enable-helm) component.
+
+Both components are attempting to patch the `spec.kustomizeBuildOptions` field.

openshift-gitops-operator/instance/components/kustomize-build-policy-generator/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1alpha1
+kind: Component
+
+patches:
+  - path: patch-enable-policy-generator.yaml
+    target:
+      kind: ArgoCD

openshift-gitops-operator/instance/components/kustomize-build-policy-generator/patch-enable-policy-generator.yaml

@@ -0,0 +1,29 @@
+apiVersion: argoproj.io/v1alpha1
+kind: ArgoCD
+metadata:
+  name: openshift-gitops
+  namespace: openshift-gitops
+spec:
+  repo:
+    env:
+    - name: KUSTOMIZE_PLUGIN_HOME
+      value: /etc/kustomize/plugin
+    initContainers:
+    - args:
+      - -c
+      - cp /etc/kustomize/plugin/policy.open-cluster-management.io/v1/policygenerator/PolicyGenerator
+        /policy-generator/PolicyGenerator
+      command:
+      - /bin/bash
+      image: registry.redhat.io/rhacm2/multicluster-operators-subscription-rhel8:v2.8
+      name: policy-generator-install
+      volumeMounts:
+      - mountPath: /policy-generator
+        name: policy-generator
+    volumeMounts:
+    - mountPath: /etc/kustomize/plugin/policy.open-cluster-management.io/v1/policygenerator
+      name: policy-generator
+    volumes:
+    - emptyDir: {}
+      name: policy-generator
+  kustomizeBuildOptions: --enable-alpha-plugins