Method ParseRule

policy/parser.go:799–832

ParseRule will parse the current yaml node as though it is the entry point to a rule.

(ctx ParserContext, policy *Policy, node *yaml.Node)

// ParseRule will parse the current yaml node as though it is the entry point to a rule.
func (p *parserImpl) ParseRule(ctx ParserContext, policy *Policy, node *yaml.Node) *Rule {
	r, id := ctx.NewRule(node)
	if p.assertYAMLType(id, node, yamlMap) == nil || !p.checkMapValid(ctx, id, node) {
		return r
	}
	p.RangeMap(node, func(key, val *yaml.Node) bool {
		tagID := ctx.CollectMetadata(key)
		fieldName := key.Value
		switch fieldName {
		case "id":
			r.SetID(ctx.NewString(val))
		case "description":
			r.SetDescription(ctx.NewString(val))
		case "variables":
			p.parseVariables(ctx, policy, r, val)
		case "match", "aggregate":
			sem := firstMatch
			if fieldName == "aggregate" {
				sem = aggregate
			}
			if r.semantic != unspecified && r.semantic != sem {
				p.ReportErrorAtID(tagID, "Only one of 'match' or 'aggregate' may be set in a rule")
			} else {
				r.SetSemantic(sem)
				policy.SetSemantic(sem)
				p.parseMatches(ctx, policy, r, val)
			}
		default:
			p.visitor.RuleTag(ctx, tagID, fieldName, val, policy, r)
		}
		return true
	})
	return r
}

func (p *parserImpl) parseVariables(ctx ParserContext, policy *Policy, r *Rule, node *yaml.Node) {
	id := ctx.CollectMetadata(node)