rules:
  - id: slow-pattern-top-ellipsis
    languages:
      - yaml
    message: >-
      Using the ellipsis operator `...` at the top of the pattern drastically slows down the rule performance.
    patterns:
      - pattern-either:
          - pattern-inside: |
              pattern-inside: $X
          - pattern-inside: |
              pattern-not-inside: $X
          - pattern-inside: |
              pattern: $X
          - pattern-inside: |
              pattern-not: $X
      - pattern-regex: \|\s*\n\s*\.\.\.\s*\n[^\n]*\n\s*\.\.\.
    severity: WARNING
    metadata:
      category: performance
      technology:
        - semgrep