Referencing a predefined variable - Amazon CodeCatalyst

Referencing a predefined variable

You can reference predefined variables in any action within an Amazon CodeCatalyst workflow.

Use the following instructions to reference a predefined variable in a workflow.

For more information about predefined variables, see Using predefined variables.

Prerequisite

Determine the name of the predefined variable you want to reference, such as CommitId. For more information, see Determining which predefined variables your workflow emits.

Visual

Not available. Choose YAML to view the YAML instructions.

YAML
To reference a predefined variable (YAML editor)

  1. Open the CodeCatalyst console at https://codecatalyst.aws/.

  2. Choose your project.

  3. In the navigation pane, choose CI/CD, and then choose Workflows.

  4. Choose the name of your workflow. You can filter by the source repository or branch name where the workflow is defined, or filter by workflow name or status.

  5. Choose Edit.

  6. Choose YAML.

  7. In a CodeCatalyst action, add the predefined variable reference using the following syntax:

    ${action-group-name.action-name-or-WorkflowSource.variable-name}

    Replace:

    • action-group-name with the name of the action group.

      Note

      You can omit action-group-name if there is no action group, or if the variable is produced by an action in the same action group.

    • action-name-or-WorkflowSource with:

      The name of the action that outputs the variable.

      or

      WorkflowSource, if the variable is the BranchName or CommitId variable.

    • variable-name with the name of the variable.

    For example:

    MySecondAction:
    Configuration:
      Steps:
        - Run: echo ${MyFirstECSAction.cluster}

    Another example:

    MySecondAction:
    Configuration:
      Steps:
        - Run: echo ${WorkflowSource.CommitId}

    For more examples, see Examples of referencing predefined variables. For more information, see the Workflow YAML definition for your action.

  8. (Optional) Choose Validate to validate the workflow's YAML code before committing.

  9. Choose Commit, enter a commit message, and choose Commit again.