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84 lines
2.8 KiB
Plaintext
84 lines
2.8 KiB
Plaintext
7 years ago
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#!/bin/sh
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set -e
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# Mark as not-for-autoremoval those kernel packages that are:
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# - the currently booted version
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# - the kernel version we've been called for
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# - the latest kernel version (as determined by debian version number)
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# - the second-latest kernel version
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#
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# In the common case this results in two kernels saved (booted into the
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# second-latest kernel, we install the latest kernel in an upgrade), but
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# can save up to four. Kernel refers here to a distinct release, which can
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# potentially be installed in multiple flavours counting as one kernel.
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eval $(apt-config shell APT_CONF_D Dir::Etc::parts/d)
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test -n "${APT_CONF_D}" || APT_CONF_D="/etc/apt/apt.conf.d"
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config_file="${APT_CONF_D}/01autoremove-kernels"
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eval $(apt-config shell DPKG Dir::bin::dpkg/f)
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test -n "$DPKG" || DPKG="/usr/bin/dpkg"
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list="$("${DPKG}" -l | awk '/^[ih][^nc][ ]+(linux|kfreebsd|gnumach)-image-[0-9]+\./ && $2 !~ /-dbg(:.*)?$/ && $2 !~ /-dbgsym(:.*)?$/ { print $2,$3; }' \
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| sed -e 's#^\(linux\|kfreebsd\|gnumach\)-image-##' -e 's#:[^:]\+ # #')"
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debverlist="$(echo "$list" | cut -d' ' -f 2 | sort --unique --reverse --version-sort)"
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if [ -n "$1" ]; then
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installed_version="$(echo "$list" | awk "\$1 == \"$1\" { print \$2;exit; }")"
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fi
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unamer="$(uname -r | tr '[A-Z]' '[a-z]')"
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if [ -n "$unamer" ]; then
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running_version="$(echo "$list" | awk "\$1 == \"$unamer\" { print \$2;exit; }")"
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fi
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# ignore the currently running version if attempting a reproducible build
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if [ -n "${SOURCE_DATE_EPOCH}" ]; then
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unamer=""
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running_version=""
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fi
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latest_version="$(echo "$debverlist" | sed -n 1p)"
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previous_version="$(echo "$debverlist" | sed -n 2p)"
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debkernels="$(echo "$latest_version
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$installed_version
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$running_version
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$previous_version" | sort -u | sed -e '/^$/ d')"
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kernels="$( (echo "$1
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$unamer"; for deb in $debkernels; do echo "$list" | awk "\$2 == \"$deb\" { print \$1; }"; done; ) \
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| sed -e 's#\([\.\+]\)#\\\1#g' -e '/^$/ d' | sort -u)"
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generateconfig() {
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cat <<EOF
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// DO NOT EDIT! File autogenerated by $0
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APT::NeverAutoRemove
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{
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EOF
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for package in $(apt-config dump --no-empty --format '%v%n' 'APT::VersionedKernelPackages'); do
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for kernel in $kernels; do
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echo " \"^${package}-${kernel}$\";"
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done
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done
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echo '};'
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if [ "${APT_AUTO_REMOVAL_KERNELS_DEBUG:-true}" = 'true' ]; then
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cat <<EOF
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/* Debug information:
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# dpkg list:
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$(dpkg -l | grep '\(linux\|kfreebsd\|gnumach\)-image-')
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# list of installed kernel packages:
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$list
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# list of different kernel versions:
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$debverlist
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# Installing kernel: $installed_version ($1)
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# Running kernel: ${running_version:-ignored} (${unamer:-ignored})
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# Last kernel: $latest_version
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# Previous kernel: $previous_version
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# Kernel versions list to keep:
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$debkernels
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# Kernel packages (version part) to protect:
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$kernels
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*/
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EOF
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fi
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}
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generateconfig "$@" > "${config_file}.dpkg-new"
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mv -f "${config_file}.dpkg-new" "$config_file"
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chmod 444 "$config_file"
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