Description of problem:

When trying to write a test for GITOPS-1919, we realized that no one of the different examples is working. The errors are various, so we start wondering if the problem is due to the lack of a proper Application example, or if this is an actual problem (if we are not able to install a simple example, I'm afraid most of the customers would be on the same page)

Steps to Reproduce

Some of the different manifests that we use to try to install this application are below, under the section Actual Results. In each of them, I describe the error shown by ArgoCD.

Actual results:

1. Example manifest:

   apiVersion: argoproj.io/v1alpha1
   kind: Application
   metadata:   name: test-gitops-2692
     namespace: openshift-gitops
   spec:   project: default
     syncPolicy:     automated:       prune: true
         selfHeal: true
     destination:     server: https://kubernetes.default.svc
       namespace: default
     sources:     - repoURL: https://github.com/helm/charts
         targetRevision: master
         path: incubator/mongodb
       - repoURL: https://github.com/helm/charts
         targetRevision: master
         path: incubator/etcd
       - repoURL: https://helm.elastic.co            # path is missing so no manifests are generated
         targetRevision: 7.7.0
         ref: helmRepo                               # repo is available via symlink "$helmRepo"
       - repoURL: https://github.com/helm/charts
         targetRevision: master
         path: incubator/etcd                        # path "incubator/etcd" is used to generate manifests
         helm:         valueFiles:           - $helmRepo/values.yaml                 # values.yaml is located in source with reference name $helmRepo
   

   Result:

   ComparisonError    rpc error: code = Unknown desc = repository not found
   

1. Example manifest:

   apiVersion: argoproj.io/v1alpha1
   kind: Application
   metadata:   name: test-gitops-2692
     namespace: openshift-gitops
   spec:   project: default
     syncPolicy:     automated:       prune: true
         selfHeal: true
     destination:     server: https://kubernetes.default.svc
       namespace: default
     sources:   - repoURL: https://github.com/elastic/helm-charts
       targetRevision: HEAD
       ref: helmRepo
     - repoURL: 'https://prometheus-community.github.io/helm-charts'
       chart: prometheus
       targetRevision: 15.7.1
       helm:       valueFiles:       - $helmRepo/elasticsearch/examples/config/values.yaml
   

   Result:

   NAME               SYNC STATUS   HEALTH STATUS
   test-gitops-2692   OutOfSync     Missing
   

1. Manifest Example:

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   kind: Application
   metadata:
     name: test-gitops-2692
     namespace: openshift-gitops
   spec:
     project: default
     syncPolicy:
       automated:
         prune: true
         selfHeal: true
     destination:
       server: https://kubernetes.default.svc
       namespace: default
     sources:
     - repoURL: https://github.com/helm/examples
       targetRevision: HEAD
       ref: helmRepo
     - repoURL: https://prometheus-community.github.io/helm-charts
       chart: prometheus
       targetRevision: 15.7.1
       helm:
         valueFiles:
         - $helmRepo/charts/hello-world/values.yaml
   

   Result:

   NAME               SYNC STATUS   HEALTH STATUS
   test-gitops-2692   OutOfSync     Progressing
   

Expected results:

The Application is installed successfully