For some developers, Containerfile is just an alternative name for Dockerfile.
For some others, Containerfile and Dockerfile are used in order to explicitly inform the format (oci vs `docker) of the container.
And there are projects (including some of mine) using Containerfile names. However this plugin doesn't detect the files due to the naming difference.
Differences between OCI and Docker
For the sake of brevity, I won't go fully deep into the topic as this is not the place for discussing it. But there are actually some differences between OCI and Docker specifications, but Docker specification is essentially an extension of OCI specification.
docker format allows HEALTHCHECK and SHELL instructions while oci doesn't
Docker only builds docker format containers
Podman and Buildah build oci and docker containers
Docker is happy to runoci containers as well
Hadolint
Hadolint is able to lint both formats without any problem.
$ hadolint path/to/Containerfile # Works like a charm
Feature request
My request is about detecting Containerfile as an alternative name to Dockerfile and linting them just like it would with Dockerfiles. As Hadolint does that out-of-the-box, this should not require any change to Hadolint.
Intro
For some developers,
Containerfileis just an alternative name forDockerfile. For some others,ContainerfileandDockerfileare used in order to explicitly inform the format (ocivs `docker) of the container.And there are projects (including some of mine) using
Containerfilenames. However this plugin doesn't detect the files due to the naming difference.Differences between OCI and Docker
For the sake of brevity, I won't go fully deep into the topic as this is not the place for discussing it. But there are actually some differences between OCI and Docker specifications, but Docker specification is essentially an extension of OCI specification.
dockerformat allowsHEALTHCHECKandSHELLinstructions whileocidoesn'tdockerformat containersocianddockercontainersocicontainers as wellHadolint
Hadolint is able to lint both formats without any problem.
Feature request
My request is about detecting
Containerfileas an alternative name toDockerfileand linting them just like it would withDockerfiles. As Hadolint does that out-of-the-box, this should not require any change to Hadolint.Extra info
Containerfile spec: https://www.mankier.com/5/Containerfile Buildah on Containerfile vs Dockerfile and preferring Containerfile: https://github.com/containers/buildah/discussions/3170