# ═══════════════════════════════════════════════════════════
#  proton-ge, built wow64-only, as a copyable image
#
#  This file does not build Proton. It packages a Proton tree that was already
#  built, and it cannot build it: proton-ge's build runs its own steps in the
#  Steam Runtime SDK image through a container engine, so it runs on the host,
#  and running it inside this build would mean nested containers.
#  `scripts/proton-build.sh` does the build, and this file wraps the result.
#
#  Separate from the guest Containerfile because it is a separate cadence:
#  hours to build, and only when PROTON_TAG moves. The guest image pulls the
#  result from a registry instead of rebuilding it, which is why none of this
#  is reached by `make build`.
#
#  It is FROM scratch, so the image *is* the Proton tree. There is nothing in
#  it to run, only something to COPY --from.
#
#  Build and publish with `make proton-image` / `make proton-push`. **Its
#  context is the built tree** (`output/proton/obj/dist`), and not this
#  directory or the repository root: the tree is the whole input, and it is
#  the only thing the build needs to send.
# ═══════════════════════════════════════════════════════════
FROM scratch
ARG BUILD_NAME=proton-ge
COPY . /usr/share/steam/compatibilitytools.d/${BUILD_NAME}/