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ARG ARCH="arm64/v8" | ||
ARG PKGS="bash curl php" | ||
ARG BINS="bash curl php" | ||
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ARG BASE_IMAGE="debian" | ||
ARG BASE_TAG="12" | ||
ARG BASE_PKG_INSTALL_CMD="apt-get update && apt-get install -y" | ||
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ARG TARGET_IMAGE="gcr.io/distroless/base-nossl-debian${BASE_TAG}" | ||
ARG TARGET_TAG="latest" | ||
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FROM --platform="linux/${ARCH}" ${BASE_IMAGE}:${BASE_TAG} AS base | ||
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ARG PKGS | ||
ARG BINS | ||
ARG BASE_PKG_INSTALL_CMD | ||
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COPY --chmod=755 "dependency_resolve" "/usr/local/bin/dependency_resolve" | ||
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RUN /bin/sh -c "${BASE_PKG_INSTALL_CMD} ${PKGS}" \ | ||
&& /usr/local/bin/dependency_resolve \ | ||
"$(which "ldd")" \ | ||
$(echo "${BINS}" | xargs which) \ | ||
| xargs -I {} sh -c 'mkdir -p /root/rootfs/$(dirname "{}") && cp -apP "{}" "/root/rootfs/{}"' \ | ||
&& for BINARY in ${BINS}; do \ | ||
"${BINARY}" --version >> "/root/rootfs/expect.txt"; \ | ||
done | ||
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FROM --platform="linux/${ARCH}" busybox:latest as busybox | ||
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FROM --platform="linux/${ARCH}" ${TARGET_IMAGE}:${TARGET_TAG} as target | ||
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ARG PKGS | ||
ARG BINS | ||
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COPY --from=base "/root/rootfs" "/" | ||
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COPY --from=busybox "/bin/busybox" "/bin/busybox" | ||
RUN ["/bin/busybox", "ln", "-s", "/bin/busybox", "/bin/sh"] | ||
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ENTRYPOINT ["/bin/sh"] |
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#!/bin/sh | ||
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DRSLV_VERSION="2.0.0" | ||
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DRSLV_SUCCESS=0 | ||
DRSLV_ERROR_WRONG_PARAMS=1 | ||
DRSLV_ERROR_PROCESS_FAILED=2 | ||
DRSLV_ERROR_LDD_NOT_FOUND=3 | ||
DRSLV_ERROR_LDD_NOT_SUPPORTED=4 | ||
DRSLV_ERROR_BINARY_NOT_FOUND=5 | ||
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usage() { | ||
echo "dependency resolve - distroless packaging support v${DRSLV_VERSION} | ||
usage: ${0} [ldd_binary_path] ...[target_binary_paths] | ||
" | ||
} | ||
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version() { | ||
echo "${DRSLV_VERSION}" | ||
} | ||
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check_ldd() { | ||
if [ ! -f "${1}" ]; then | ||
echo "ldd not found: ${1}" >&2 | ||
exit ${DRSLV_ERROR_LDD_NOT_FOUND} | ||
fi | ||
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ldd_version=$("${1}" --version 2>&1) | ||
if ! echo "${ldd_version}" | grep -qE '(GLIBC|musl libc)'; then | ||
echo "ldd executable not supported: ${1}" >&2 | ||
exit ${DRSLV_ERROR_LDD_NOT_SUPPORTED} | ||
fi | ||
} | ||
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check_binary() { | ||
if [ ! -e "${1}" ]; then | ||
echo "binary not found: ${1}" >&2 | ||
exit ${DRSLV_ERROR_BINARY_NOT_FOUND} | ||
fi | ||
} | ||
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resolve_symlink() { | ||
path="${1}" | ||
result="${path}" | ||
while [ -L "${path}" ]; do | ||
link_target=$(readlink "${path}") | ||
if echo "${link_target}" | grep -q '^/'; then | ||
path="${link_target}" | ||
else | ||
path="$(cd "$(dirname "${path}")" && pwd)/${link_target}" | ||
fi | ||
result="${result} ${path}" | ||
done | ||
echo "${result}" | ||
} | ||
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dependency_resolve() { | ||
ldd_path="${1}" | ||
binary_path="${2}" | ||
result="" | ||
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resolved_paths=$(resolve_symlink "${binary_path}") | ||
for path in ${resolved_paths}; do | ||
result="${result} ${path}" | ||
if [ -f "${path}" ]; then | ||
ldd_output=$("${ldd_path}" "${path}" 2>&1) | ||
if ! echo "${ldd_output}" | grep -qE '(not a dynamic executable|Not a valid dynamic program)'; then | ||
while read -r line; do | ||
library=$(echo "${line}" | awk '{print $3}') | ||
if [ -n "${library}" ] && [ "${library}" != "not" ]; then | ||
result="${result} $(dependency_resolve "${ldd_path}" "${library}")" | ||
fi | ||
done << EOF | ||
${ldd_output} | ||
EOF | ||
fi | ||
fi | ||
done | ||
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echo "${result}" | ||
} | ||
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if [ $# -lt 2 ]; then | ||
case "${1}" in | ||
-v|--version) | ||
version | ||
exit ${DRSLV_SUCCESS} | ||
;; | ||
-h|--help) | ||
usage | ||
exit ${DRSLV_SUCCESS} | ||
;; | ||
*) | ||
usage | ||
exit ${DRSLV_ERROR_WRONG_PARAMS} | ||
;; | ||
esac | ||
fi | ||
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ldd_path="${1}" | ||
check_ldd "${ldd_path}" | ||
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shift | ||
for binary_path in "$@"; do | ||
check_binary "${binary_path}" | ||
done | ||
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dependencies="" | ||
for binary_path in "$@"; do | ||
dependencies="${dependencies} $(dependency_resolve "${ldd_path}" "${binary_path}")" | ||
done | ||
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echo "${dependencies}" | tr ' ' '\n' | sort | uniq | sed '/^$/d' | ||
exit ${DRSLV_SUCCESS} |