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How To: “Export” Variables From Child Pipeline

Overview

Below outlines a way you can capture variables from child pipelines in the parent pipeline.

Details

The solution here is to use annotations [1] to capture the variables from child pipelines. Annotations are in plain text and should be considered non-confidential.

Child Pipeline

Below is a step you can add at the end of the child pipeline to “export” the variables for the parent pipeline to access.

setAnnotation:
  title: Set var on parent
  image: codefresh/cli
  commands:
    - PARENT=$(codefresh get -o json annotation workflow $CF_BUILD_ID cf_predecessor | jq .value)
    - echo "PARENT= $PARENT"
    - codefresh create annotation workflow $PARENT MY_VAR="my awesome value"

Parent Pipeline

Below is a step you will use after the child pipeline completes to access the “exported” variable. This step uses the cf_export [2] to make the variable accessible in future steps.

displayAnnotation:
  title: setVar
  image: codefresh/cli
  commands:
    - cf_export My_VAR="$(codefresh get -o json annotation workflow $CF_BUILD_ID MY_VAR | jq .value)"

[1] Annotations

[2] Exporting Variables