pint.error --no-color lint rules
! stdout .
cmp stderr stderr.txt

-- stderr.txt --
level=INFO msg="Finding all rules to check" paths=["rules"]
rules/1.yaml:7 Fatal: This rule is not a valid Prometheus rule: `invalid annotation name: {{ $value }}`. (yaml/parse)
 7 |       "{{ $value }}": "down"

rules/1.yaml:11 Fatal: This rule is not a valid Prometheus rule: `invalid label name: {{ $value }}`. (yaml/parse)
 11 |       "{{ $value }}": "down"

level=INFO msg="Problems found" Fatal=2
level=ERROR msg="Fatal error" err="found 1 problem(s) with severity Bug or higher"
-- rules/1.yaml --
groups:
- name: g1
  rules:
  - alert: Service Down
    expr: up == 0
    annotations:
      "{{ $value }}": "down"
  - alert: Service Down
    expr: up == 0
    labels:
      "{{ $value }}": "down"
