Missing substitution of propagated workspace in WorkingDirs

[chitrangpatel]

Expected Behavior

apiVersion: tekton.dev/v1
kind: PipelineRun
metadata:
  name: ws-1
spec:
  workspaces:
  - name: "default-workspace"
    volumeClaimTemplate:
      spec:
        accessModes:
         - ReadWriteOnce
        resources:
          requests:
            storage: 1Gi
  pipelineSpec:
    tasks:
    - name: "write-sth"
      taskSpec:
        steps:
          - image: "ubuntu"
            script: |
              #!/bin/bash
              cd "$(workspaces.default-workspace.path)"
              mkdir -p backend/app
              ls -tlr
    - name: "get-it"
      taskSpec:
        steps:
          - image: "ubuntu"
            workingDir: $(workspaces.default-workspace.path)/backend/app
            script: |
              pwd
              echo done

The abovePipelineRun should run well and replace $(workspaces.default-workspace.path) with /workspace/default-workspace in the workingDir of the step because of workspace propagation.

Actual Behavior

The substitution is not applied and the container fails with the error message that the workingDir must be an absolute path. However, the same works in a Taskrun.

Steps to Reproduce the Problem

1. Execute the above pipelinerun in any of the recent Tekton Pipelines releases.

Additional Info

• Kubernetes version:

  Output of kubectl version:

(paste your output here)

• Tekton Pipeline version:

  Output of tkn version or kubectl get pods -n tekton-pipelines -l app=tekton-pipelines-controller -o=jsonpath='{.items[0].metadata.labels.version}'

(paste your output here)