mirror of
https://github.com/N0rthernL1ghts/s6-rootfs.git
synced 2025-12-08 11:42:41 +01:00
76 lines
3.2 KiB
Docker
76 lines
3.2 KiB
Docker
ARG S6_OVERLAY_VERSION="3.2.0.2"
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ARG S6_OVERLAY_RELEASE="https://github.com/just-containers/s6-overlay/releases/download"
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ARG S6_OVERLAY_PAK_EXT=".tar.xz"
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# Downloader stage: download s6-overlay base, binary, symlinks and checksums
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FROM alpine:3.22 AS downloader
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ARG TARGETPLATFORM
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ARG S6_OVERLAY_VERSION
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ARG S6_OVERLAY_RELEASE
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ARG S6_OVERLAY_PAK_EXT
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# Set environment variables
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ENV BASE_URL="${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-noarch${S6_OVERLAY_PAK_EXT}"
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ENV BASE_HASH_URL="${BASE_URL}.sha256"
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ENV BIN_URL="${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-${TARGETPLATFORM}${S6_OVERLAY_PAK_EXT}"
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ENV BIN_HASH_URL="${BIN_URL}.sha256"
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ENV SYMLINKS_ARCH_URL="${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-symlinks-arch${S6_OVERLAY_PAK_EXT}"
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ENV SYMLINKS_ARCH_HASH_URL="${SYMLINKS_ARCH_URL}.sha256"
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ENV SYMLINKS_NOARCH_URL="${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-symlinks-noarch${S6_OVERLAY_PAK_EXT}"
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ENV SYMLINKS_NOARCH_HASH_URL="${SYMLINKS_NOARCH_URL}.sha256"
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RUN set -eux \
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&& apk add --no-cache wget \
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# Replace platform
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&& BIN_URL_FIXED=$(echo "${BIN_URL}" | sed -e 's/linux\///g' -e 's/amd64/x86_64/g' -e 's/arm64/aarch64/g' -e 's|arm/v7|armhf|g') \
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&& BIN_HASH_URL_FIXED=$(echo "${BIN_HASH_URL}" | sed -e 's/linux\///g' -e 's/amd64/x86_64/g' -e 's/arm64/aarch64/g' -e 's|arm/v7|armhf|g') \
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# Download s6-overlay binaries
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&& wget -O /s6overlay-bin.tar.xz "${BIN_URL_FIXED}" \
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&& wget -O /s6overlay-bin.tar.xz.sha256 "${BIN_HASH_URL_FIXED}" \
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# Download s6-overlay base and its hash
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&& wget -O /s6overlay-base.tar.xz "${BASE_URL}" \
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&& wget -O /s6overlay-base.tar.xz.sha256 "${BASE_HASH_URL}" \
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# Download s6-overlay symlinks \
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&& wget -O /s6overlay-arch-symlinks.tar.xz "${SYMLINKS_ARCH_URL}" \
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&& wget -O /s6overlay-arch-symlinks.tar.xz.sha256 "${SYMLINKS_ARCH_HASH_URL}" \
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&& wget -O /s6overlay-noarch-symlinks.tar.xz "${SYMLINKS_NOARCH_URL}" \
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&& wget -O /s6overlay-noarch-symlinks.tar.xz.sha256 "${SYMLINKS_NOARCH_HASH_URL}" \
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# Build SHA256SUMS file
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&& echo "$(cut -d' ' -f1 /s6overlay-base.tar.xz.sha256) /s6overlay-base.tar.xz" > /SHA256SUMS \
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&& echo "$(cut -d' ' -f1 /s6overlay-bin.tar.xz.sha256) /s6overlay-bin.tar.xz" >> /SHA256SUMS \
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&& echo "$(cut -d' ' -f1 /s6overlay-arch-symlinks.tar.xz.sha256) /s6overlay-arch-symlinks.tar.xz" >> /SHA256SUMS \
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&& echo "$(cut -d' ' -f1 /s6overlay-noarch-symlinks.tar.xz.sha256) /s6overlay-noarch-symlinks.tar.xz" >> /SHA256SUMS \
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# Verify integrity of downloaded files
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&& sha256sum -c /SHA256SUMS
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# Builder stage
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FROM busybox AS builder
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COPY --from=downloader ["/s6overlay-base.tar.xz", "/s6overlay-bin.tar.xz", "/s6overlay-arch-symlinks.tar.xz", "/s6overlay-noarch-symlinks.tar.xz", "/tmp/s6/"]
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RUN set -eux \
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&& mkdir -p /build \
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&& tar -Jxpf /tmp/s6/s6overlay-base.tar.xz -C /build \
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&& tar -Jxpf /tmp/s6/s6overlay-bin.tar.xz -C /build \
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&& tar -Jxpf /tmp/s6/s6overlay-arch-symlinks.tar.xz -C /build \
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&& tar -Jxpf /tmp/s6/s6overlay-noarch-symlinks.tar.xz -C /build
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# Rootfs
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FROM scratch AS rootfs
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COPY --from=builder ["/build/", "/"]
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# Final image: minimal rootfs
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FROM scratch
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LABEL maintainer="Aleksandar Puharic <aleksandar@puharic.com>"
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COPY --from=rootfs ["/", "/"]
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