Imports from Jsonnet library paths are broken

[maxbrunet]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

Imports from Jsonnet library paths have stopped working since version 2.2.6

Manifest generation error (cached): rpc error: code = FailedPrecondition desc = Failed to evaluate jsonnet "main.jsonnet": RUNTIME ERROR: couldn't open import "grafana.libsonnet": no match locally or in the Jsonnet library paths
        .grafana/environments/staging/main.jsonnet:1:11-37      thunk <g> from <$>
        .grafana/environments/staging/main.jsonnet:3:17-18      thunk <grafana> from <$>
        .grafana/environments/staging/main.jsonnet:48:36-43     thunk from <object <anonymous>>
        <std>:1501:24-25        thunk from <function <anonymous>>
        <std>:1501:5-33 function <anonymous>
        .grafana/environments/staging/main.jsonnet:48:19-44     object <anonymous>
        .grafana/environments/staging/main.jsonnet:(46:5)-(51:6)
        Field "items"
        During manifestation

All our Jsonnet-based applications follow a Ksonnet/Tanka-like structure:

.
└── grafana/
    ├── environments/           # Environment-specific resources and overrides
    │   └── staging/
    │       └── main.libsonnet
    ├── lib/                    # Jsonnet libraries
    │   └── grafana.libsonnet
    └── vendor/                 # Third-party libraries
        └── github.com/brancz/kubernetes-grafana/grafana/
            └── grafana.libsonnet

I suspect it to be caused by #8606

To Reproduce

• Write some Jsonnet with imports from JPath:

mkdir -p jsonnet-imports/environments/staging jsonnet-imports/lib
cat > jsonnet-imports/lib/mylib.libsonnet <<EOF
{
  apiVersion: 'v1',
  kind: 'ConfigMap',
  metadata: {
    name: 'my-config-map',
  },
  data: {},
}
EOF
echo "(import 'mylib.libsonnet')" > jsonnet-imports/environments/staging/main.jsonnet

• Optionally, test generating with the Jsonnet CLI:

jsonnet -J jsonnet-imports/lib jsonnet-imports/environments/staging/main.jsonnet

• Create the Application:

REPO_URL='git@bitbucket.org:myworkspace/myrepo.git'
kubectl apply -f - <<EOF
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: jsonnet-imports
spec:
  destination:
    namespace: default
    server: https://kubernetes.default.svc
  project: default
  source:
    directory:
      jsonnet:
        libs:
        - jsonnet-imports/lib
    path: jsonnet-imports/environments/staging
    repoURL: ${REPO_URL}
    targetRevision: HEAD
EOF

Expected behavior

Jsonnet imports from JPath work and the manifest is generated

Screenshots

Version

v2.2.6+2e550c3

Also affects v2.3.0

Logs

time="2022-03-08T02:28:53Z" level=info msg="manifest error cache hit: &ApplicationSource{RepoURL:git@bitbucket.org:myworkspace/myrepo.git,Path:grafana/environments/staging,TargetRevision:HEAD,Helm:nil,Kustomize:nil,Ksonnet:nil,Directory:&ApplicationSourceDirectory{Recurse:false,Jsonnet:ApplicationSourceJsonnet{ExtVars:[]JsonnetVar{},TLAs:[]JsonnetVar{},Libs:[grafana/vendor grafana/lib],},Exclude:,Include:,},Plugin:nil,Chart:,}/3b76739906d9dc4b7853af361891ec8e5b36b9a3"
time="2022-03-08T02:28:53Z" level=error msg="finished unary call with code Unknown" error="Manifest generation error (cached): rpc error: code = FailedPrecondition desc = Failed to evaluate jsonnet \"main.jsonnet\": RUNTIME ERROR: couldn't open import \"grafana.libsonnet\": no match locally or in the Jsonnet library paths\n\t.grafana/environments/staging/main.jsonnet:1:11-37\tthunk <g> from <$>\n\t.grafana/environments/staging/main.jsonnet:3:17-18\tthunk <grafana> from <$>\n\t.grafana/environments/staging/main.jsonnet:48:36-43\tthunk from <object <anonymous>>\n\t<std>:1501:24-25\tthunk from <function <anonymous>>\n\t<std>:1501:5-33\tfunction <anonymous>\n\t.grafana/environments/staging/main.jsonnet:48:19-44\tobject <anonymous>\n\t.grafana/environments/staging/main.jsonnet:(46:5)-(51:6)\t\n\tField \"items\"\t\n\tDuring manifestation\t\n" grpc.code=Unknown grpc.method=GenerateManifest grpc.request.deadline="2022-03-08T02:30:51Z" grpc.service=repository.RepoServerService grpc.start_time="2022-03-08T02:28:51Z" grpc.time_ms=2419.792 span.kind=server system=grpc

[alexmt]

Thanks for providing the sample app.