optional-resources.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: task-check-optional-resources
spec:
  params:
  - name: filename
    type: string
    default: "README.md"
  resources:
    inputs:
      - name: git-repo
        type: git
        description: "The input is code from a git repository"
        optional: true
    outputs:
      - name: optionalimage
        type: image
        description: "The output is a Docker image"
        optional: true
  steps:
    - name: check-git-repo
      image: ubuntu
      script: |
        #!/usr/bin/env bash
        if [ -d $(resources.inputs.git-repo.path) ]; then
          echo "Git repo was cloned at $(resources.inputs.git-repo.path)"
          if [ -f $(resources.inputs.git-repo.path)/$(inputs.params.filename) ]; then
            echo "$(inputs.params.filename) does exist at $(resources.inputs.git-repo.path)"
          else
            echo "$(inputs.params.filename) does not exist at $(resources.inputs.git-repo.path)"
          fi
        else
          echo "Git repo was not cloned at $(resources.inputs.git-repo.path)"
        fi
        if [ "$(outputs.resources.optionalimage.url)" == "" ]; then
          echo "Image URL: $(outputs.resources.optionalimage.url)"
        else
          echo "No image URL specified."
        fi
        echo "Yay, Input and Output Resources can be Optional!"
---

apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: demo-optional-inputs-resources-with-resources
spec:
  params:
  - name: filename
    value: "README.md"
  resources:
    inputs:
      - name: git-repo
        resourceSpec:
          type: git
          params:
            - name: url
              value: https://github.com/tektoncd/pipeline.git
    outputs:
      - name: optionalimage
        resourceSpec:
          type: image
          params:
            - name: url
              value: gcr.io/foo/bar
  taskRef:
    name: task-check-optional-resources
---

apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: demo-optional-inputs-resources-invalid-filename
spec:
  params:
  - name: filename
    value: "invalid.md"
  resources:
    inputs:
      - name: git-repo
        resourceSpec:
          type: git
          params:
            - name: url
              value: https://github.com/tektoncd/pipeline.git
  taskRef:
    name: task-check-optional-resources
---

apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: demo-optional-inputs-resources-without-resources
spec:
  params:
  - name: filename
    value: "README.md"
  taskRef:
    name: task-check-optional-resources
---

apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: demo-optional-inputs-resources-without-resources-and-params
spec:
  taskRef:
    name: task-check-optional-resources
---

apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: demo-optional-outputs-resources-with-input-resources
spec:
  params:
  - name: filename
    value: "README.md"
  resources:
    inputs:
      - name: git-repo
        resourceSpec:
          type: git
          params:
            - name: url
              value: https://github.com/tektoncd/pipeline.git
  taskRef:
    name: task-check-optional-resources
---