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

Expected behavior

Hadolint should be able to lint a Dockerfile which uses the experimental --exclude flag given that the Docker image builds successfully.

Actual behavior

Hadolint fails to lint the file, producing this error:

invalid flag: --exclude

Steps to reproduce the behavior

Run hadolint on the Dockerfile provided below.

Output of docker run --rm hadolint/hadolint hadolint --version:

Haskell Dockerfile Linter 2.12.1

Dockerfile (if relevant)

# syntax=docker/dockerfile:1.7-labs
FROM alpine
COPY --exclude=code/sensitive_data ./code code

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

n/a