Does build-push-action support --ignorefile?

[starpit]

Hello there. The docker build command has a --ignorefile option. I don't see this reflected as an option to the build-push-action. Am I missing something? If not, does this seem like a reasonable feature request?

Thanks!
@starpit

[SebTardif]

@starpit

The docker build command has a --ignorefile option. I don't see this reflected as an option to the build-push-action.

--ignorefile is a Podman/Buildah flag (podman build --ignorefile). Docker Buildx does not have that flag, and docker/build-push-action has no matching input. Current action.yml exposes file (Dockerfile path) and context only.

On Docker / BuildKit, pick the ignore file this way:

1. .dockerignore in the root of the context.
2. A Dockerfile-specific file named <Dockerfile>.dockerignore next to that Dockerfile (for example Dockerfile.ci.dockerignore beside file: Dockerfile.ci). BuildKit loads that automatically.

If you need a third ignore list that is not next to the Dockerfile, copy it into place and use a path context. Mutations before the build step are ignored when the context is a Git ref.

- name: Use a CI-specific ignore file
  run: cp service/ci.dockerignore service/.dockerignore
- uses: docker/build-push-action@v6
  with:
    context: ./service
    file: ./service/Dockerfile

So this is not a missing mapping of an existing Docker CLI flag. A new ignorefile input would still be a reasonable enhancement if you want an explicit path without renaming files.