rules:
- id: missing-yum-clean-all
  severity: WARNING
  languages: [generic]
  patterns:
  - pattern: yum $COMMAND
  - pattern-not-inside: RUN ... && yum clean all
  - pattern-not-inside: RUN ... && \ yum clean all
  message: >-
    This yum command does not end with '&& yum clean all'. Running 'yum clean all' will remove cached
    data and reduce package size. (This must be performed in the same RUN step.)
  metadata:
    source-rule-url: https://github.com/hadolint/hadolint/wiki/DL3032
    references:
    - https://github.com/hadolint/hadolint/wiki/DL3032
    category: best-practice
    technology:
    - dockerfile
  paths:
    include:
    - '*dockerfile*'
    - '*Dockerfile*'