rules:
  - id: localization
    patterns:
      - pattern: local $LHS = $RHS
      - pattern-regex: ^local* # restrict to file scope (ugly hack)
      - metavariable-regex:
           metavariable: $RHS
           regex: ^[a-zA-Z_][a-zA-Z0-9_\.]*$ # only match some_stuff and some_stuff.some_field
      - metavariable-regex:
           metavariable: $LHS
           regex: ^[a-z0-9_]*$ # don't match upper case
      - metavariable-pattern:
           metavariable: $RHS
           patterns:
             - pattern-not: |
                 false
             - pattern-not: |
                 true
             - pattern-not: |
                 nil
      - metavariable-pattern:
           metavariable: $LHS
           patterns:
             - pattern-not: C # often used for color escape
             - pattern-not: F # often used for formspec escape
             - pattern-not: mob_class # used in mcl_mobs code
      - metavariable-regex:
          metavariable: $LHS
          regex: ^(?!old).*$ # exclude everything that starts with old
      - metavariable-regex:
          metavariable: $LHS
          regex: ^(?!original).*$ # exclude everything that starts with original
    message: "replace $LHS $RHS" # prints micro command to replace
    languages: [lua]
    severity: WARNING