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hack/Containerfile: New file for local container builds
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This is a relatively efficient container-oriented build flow
suitable for local iteration.

Signed-off-by: Colin Walters <[email protected]>
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cgwalters committed Jan 12, 2024
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# This container build is just a demo effectively; it shows how one might
# build bootc in a container flow, using Fedora ELN as the target.
FROM quay.io/centos-bootc/fedora-bootc:eln as build
RUN dnf config-manager --set-enabled eln-crb && dnf -y install cargo ostree-devel openssl-devel && dnf clean all
COPY . /build
WORKDIR /build
# See https://www.reddit.com/r/rust/comments/126xeyx/exploring_the_problem_of_faster_cargo_docker/
# We aren't using the full recommendations there, just the simple bits.
RUN --mount=type=cache,target=/build/target --mount=type=cache,target=/var/roothome make bin-archive && mkdir -p /out && cp target/bootc.tar.zst /out

FROM quay.io/centos-bootc/fedora-bootc:eln
COPY --from=build /out/bootc.tar.zst /tmp
RUN tar -C / --zstd -xvf /tmp/bootc.tar.zst && rm -vf /tmp/*

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