107 lines
3.3 KiB
Bash
Executable file
107 lines
3.3 KiB
Bash
Executable file
#!/bin/bash
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# snap-pac
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# https://github.com/wesbarnett/snap-pac
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# Copyright (C) 2016, 2017 James W. Barnett
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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declare -r SNAPPER_CONFIG_FILE=/etc/conf.d/snapper
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declare -r DESC_LIMIT=48
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declare -r name="snap-pac"
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declare PACMAN_ABORT_ON_FAIL="no"
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declare -r pacman_cmd="$(ps -q $(ps -p "$$" -o ppid=) -o args=)"
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declare -r pre_or_post=$1
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out() { printf "$1 $2\n" "${@:3}"; }
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error() { out "==> \033[00;31merror:\033[00m" "$@"; } >&2
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die() {
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error "$@"
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[[ $PACMAN_ABORT_ON_FAIL == "no" ]] && exit 0
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exit 1
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}
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error_exit() { die "Aborted due to error."; }
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kill_exit() { die "\nExited due to user intervention."; }
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truncate_description() {
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desc="$@"
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if [[ "${#desc}" -gt $DESC_LIMIT ]]; then
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echo "$(echo $desc | cut -c 1-$DESC_LIMIT)..."
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else
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echo $desc
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fi
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}
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set_defaults() {
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PACMAN_PRE_POST="no"
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[[ $CONFIG == "root" ]] && PACMAN_PRE_POST="yes"
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PACMAN_PRE_DESCRIPTION="$pacman_cmd"
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PACMAN_POST_DESCRIPTION="$pacman_cmd"
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PACMAN_CLEANUP_ALGORITHM="number"
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PACMAN_LINK_MODULES="no"
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}
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package_updated() {
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check="$1"
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for x in ${packages[@]}; do
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if [[ "$x" == "$check" ]]; then
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echo "yes"
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return
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fi
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done
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echo "no"
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}
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trap error_exit ERR
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trap kill_exit SIGTERM SIGINT
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mapfile -t packages
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kernel_updated=$(package_updated "linux")
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source "$SNAPPER_CONFIG_FILE"
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for CONFIG in $SNAPPER_CONFIGS; do
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set_defaults
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source /etc/snapper/configs/"$CONFIG"
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[[ $PACMAN_PRE_POST == "no" ]] && continue
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prefile="/tmp/$name-pre_$CONFIG"
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snapper_cmd="snapper --config $CONFIG create --type $pre_or_post --cleanup-algorithm $PACMAN_CLEANUP_ALGORITHM --print-number --description"
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if [[ "$pre_or_post" == "pre" ]]; then
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if [[ "$PACMAN_LINK_MODULES" == "yes" && "$kernel_updated" == "yes" ]]; then
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x=$($snapper_cmd "$(truncate_description $PACMAN_PRE_DESCRIPTION)" --userdata important=yes)
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else
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x=$($snapper_cmd "$(truncate_description $PACMAN_PRE_DESCRIPTION)")
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fi
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printf "==> %s: $(echo $x | tee "$prefile")\n" "$CONFIG"
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elif [[ -f $prefile && "$pre_or_post" == "post" ]]; then
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if [[ "$PACMAN_LINK_MODULES" == "yes" && "$kernel_updated" == "yes" ]]; then
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printf "==> Linking old kernel modules...\n"
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find /usr/lib/modules -xtype l -delete
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ln -sv /.snapshots/$(<$prefile)/snapshot/usr/lib/modules/$(uname -r) /usr/lib/modules/
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fi
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x=$($snapper_cmd "$(truncate_description $PACMAN_POST_DESCRIPTION)" --pre-number "$(< "$prefile")")
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printf "==> %s: %s\n" "$CONFIG" "$x"
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rm -f "$prefile"
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fi
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done
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exit 0
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