Change Missing Lambda Field

# -*- mode: yaml -*-
manifest:
  version: 1.0

automations:
  # Request changes when required Lambda information is missing from the PR.
  catch_missing_lambda_info:
    # Triggered for new Lambda functions that are missing a description field.
    if:
      - {{ source.diff.files | matchDiffLines(regex=r/LambdaFunction/) | some }}
      - {{ source.diff.files | matchDiffLines(regex=r/description:/) | nope }}
    # Apply the lambda-missing-field label and request changes to the PR.
    run:
      - action: add-label@v1
        args:
          label: 'lambda-missing-field'
          color: '#FF0000'
      - action: request-changes@v1
        args:
          comment: |
            New `LambdaFunction` must have `description:` field.