123 lines
3.5 KiB
Bash
Executable file
123 lines
3.5 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, 2018 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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set -o errtrace
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readonly argv0="snap-pac"
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readonly SNAPPAC_CONFIG_FILE=/etc/snap-pac.conf
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readonly SNAPPER_CONFIG_FILE=/etc/conf.d/snapper
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readonly pacman_cmd="$(ps -q $(ps -p "$$" -o ppid=) -o args=)"
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readonly 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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[[ $ABORT_ON_FAIL == "no" ]] && exit 0
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exit 1
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}
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read_config() {
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CONFIG_FILE="$1"
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if [[ -f "$CONFIG_FILE" ]] && [[ -r "$CONFIG_FILE" ]]; then
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while IFS='= ' read lhs rhs; do
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if [[ ! $lhs =~ ^\ *# && -n $lhs ]]; then
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rhs="${rhs%%\#*}"
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rhs="${rhs%%*( )}"
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rhs="${rhs%\"*}"
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rhs="${rhs#\"*}"
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declare -g $lhs="$rhs"
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fi
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done < "$CONFIG_FILE"
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fi
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}
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trapkill() {
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error "Exited due to user intervention."
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die
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}
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traperror() {
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error "Exited due to error on line $1"
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out "exit status:" "$2"
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out "command:" "$3"
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out "bash line:" "$4"
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out "function argv0:" "$5"
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die
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}
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truncate_description() {
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desc="$@"
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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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trap 'traperror ${LINENO} $? "$BASH_COMMAND" $BASH_LINENO "${FUNCNAME[@]}"' ERR
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trap trapkill SIGTERM SIGINT
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readonly -f read_config out error die trapkill traperror truncate_description
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SNAPPER_CONFIGS=$(awk -F'=' '/SNAPPER_CONFIGS/ {gsub(/"/, "", $2); print $2}' "$SNAPPER_CONFIG_FILE")
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read_config "$SNAPPAC_CONFIG_FILE"
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readonly DESC_LIMIT=${DESC_LIMIT:-48}
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readonly ABORT_ON_FAIL=${ABORT_ON_FAIL:-"no"}
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for CONFIG in $SNAPPER_CONFIGS; do
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unset SNAPSHOT
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unset PRE_DESCRIPTION
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unset POST_DESCRIPTION
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unset CLEANUP_ALGORITHM
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read_config "/etc/snap-pac/$CONFIG.conf"
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if [[ $CONFIG == "root" ]]; then
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SNAPSHOT=${SNAPSHOT:-"yes"}
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else
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SNAPSHOT=${SNAPSHOT:-"no"}
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fi
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PRE_DESCRIPTION=${PRE_DESCRIPTION:-"$pacman_cmd"}
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POST_DESCRIPTION=${POST_DESCRIPTION:-"$pacman_cmd"}
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CLEANUP_ALGORITHM=${CLEANUP_ALGORITHM:-"number"}
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[[ $SNAPSHOT == "no" ]] && continue
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prefile="/tmp/$argv0-pre_$CONFIG"
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snapper_cmd="snapper --config $CONFIG create --type $pre_or_post --cleanup-algorithm $CLEANUP_ALGORITHM --print-number --description"
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if [[ "$pre_or_post" == "pre" ]]; then
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x=$($snapper_cmd "$(truncate_description $PRE_DESCRIPTION)")
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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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x=$($snapper_cmd "$(truncate_description $POST_DESCRIPTION)" --pre-number "$(< "$prefile")")
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printf "==> %s: %s\n" "$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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