• This is a bug report
• This is a feature request
• I searched existing issues before opening this one

Expected behavior

docker is promoting to use $BUILDPLATFORM in a FROM statement: https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/

Using $BUILDPLATFORM in the FROM should not trigger DL3029, because the negative consequences that are mentions there are not valid when use $BUILDPLATFORM.

FROM --platform=$BUILDPLATFORM composer:2 AS builder

Actual behavior

A FROM --platform=$BUILDPLATFORM produces a DL3029

Steps to reproduce the behavior

Use FROM --platform=$BUILDPLATFORM and run hadolint.

Output of hadolint --version or
docker run --rm hadolint/hadolint hadolint --version or
docker run --rm ghcr.io/hadolint/hadolint hadolint --version:

Haskell Dockerfile Linter UNKNOWN

(is 2.8.0, see #735)

Dockerfile (if relevant)

FROM --platform=$BUILDPLATFORM composer:2 AS builder

Additional environment details (OS, stack version, etc.)