replace-yaml-values-with-yq.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: replace-yaml-value-with-yq
  labels:
    app.kubernetes.io/version: "0.1"
  annotations:
    tekton.dev/pipelines.minVersion: "0.12.1"
    tekton.dev/categories: Git
    tekton.dev/tags: gitlab, git
    tekton.dev/displayName: "Replace Yaml values with yq"
    tekton.dev/platforms: "linux/amd64"
spec:
  workspaces:
    - name: source
      description: A workspace that contains the file which values should be replaced
  params:
    - name: YQ_EXPRESSIONS
      type: array
      description: "The yq expression yaml selector to choose a key for replacement like .spec.template.spec.containers[0].image = \"$(params.IMAGE):$(params.SOURCE_REVISION)\""
    - name: FILE_PATH
      description: The file path relative to the workspace dir.
    - name: YQ_VERSION
      description: Version of https://github.com/mikefarah/yq
      default: v4.2.0
  steps:
    - name: substitute-with-yq
      image: alpine
      workingDir: $(workspaces.source.path)
      args: ["$(params.YQ_EXPRESSIONS[*])"]
      script: |
        echo "--- Download yq & add to path"
        wget https://github.com/mikefarah/yq/releases/download/$(params.YQ_VERSION)/yq_linux_amd64 -O /usr/bin/yq
        chmod +x /usr/bin/yq

        echo "--- Run yq expressions"
        for expression in "$@"
        do
          yq e "$expression" -i $(params.FILE_PATH)
        done

        echo "--- Show file with replacement"
        cat $(params.FILE_PATH)
      resources: {}