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build: drop the boot image's duplicate kernel mirror and its unused rustfmt/clippy download #456

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Merged
CMGS merged 1 commit into from
Nov 5, 2026
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build: drop the boot image's duplicate kernel mirror and its unused rustfmt/clippy download #456

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11 changes: 5 additions & 6 deletions boot/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -10,10 +10,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
xz-utils curl ca-certificates python3 \
&& rm -rf /var/lib/apt/lists/*
ARG KERNEL_VERSION=6.18.37
# Mirror chain: cdn.kernel.org currently 404s /pub/linux/kernel tarball paths
# (observed from GitHub runners and CN networks alike), while rsync mirrors
# still carry the tree. Download to a file first — a mid-stream failure must
# not leave a half-extracted tree — and verify against the pinned SHA256
# Mirror chain: KERNEL_MIRROR (cdn.kernel.org by default), then kernel.org's
# edge mirror and an rsync mirror. Download to a file first — a mid-stream
# failure must not leave a half-extracted tree — and verify against the pinned SHA256
# (kernel/SHA256, updated together with VERSION): the fallback mirrors are
# third parties and this kernel boots untrusted-code sandboxes.
ARG KERNEL_MIRROR=https://cdn.kernel.org/pub/linux/kernel
Expand All @@ -27,7 +26,6 @@ RUN set -e; \
[ -n "$hash" ] || { echo "kernel/SHA256 has no entry for linux-${KERNEL_VERSION}.tar.xz"; exit 1; }; \
rel="v${KERNEL_VERSION%%.*}.x/linux-${KERNEL_VERSION}.tar.xz"; \
for m in "${KERNEL_MIRROR}" \
https://cdn.kernel.org/pub/linux/kernel \
https://mirrors.edge.kernel.org/pub/linux/kernel \
https://mirrors.tuna.tsinghua.edu.cn/kernel; do \
echo "fetching ${m}/${rel}"; \
Expand Down Expand Up @@ -78,8 +76,9 @@ RUN set -e; \
FROM rust:1.99.1-alpine@sha256:b1d5dd5a22a09404d3e798c0cf051b689077360374eb505fa5bb93c479693d87 AS initbuild
RUN apk add --no-cache musl-dev
WORKDIR /build
# See silkd/Dockerfile: the pin, not the base image's default, is the compiler.
# See silkd/Dockerfile: the pin, not the base image's default, is the compiler; the build needs no rustfmt or clippy.
COPY init/rust-toolchain.toml ./
RUN sed -i '/^components/d' rust-toolchain.toml
COPY init/Cargo.toml init/Cargo.lock ./
COPY init/src ./src
RUN cargo build --release --locked && cp target/release/sandbox-init /sandbox-init
Expand Down