Add SNAP_PAC_SKIP
This commit is contained in:
Wes Barnett
parent
61981ab4f9
commit
0aff4920b4
2 changed files with 105 additions and 236 deletions
215
scripts/snap-pac
215
scripts/snap-pac
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@ -1,136 +1,131 @@
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#!/bin/bash
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#!/usr/bin/env python
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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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"""
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Copyright (C) 2021 Wes Barnett
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set -o errtrace
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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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[[ -v SNAP_PAC_SKIP ]] && { printf "==> skipping due to SNAP_PAC_SKIP being set"; exit 0; }
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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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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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if [[ -z $PPID ]] || [[ -z $(ps -q $PPID -o args=) ]]; then
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printf "Parent process ID is empty.\n"
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readonly pacman_cmd=""
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else
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readonly pacman_cmd="$(ps -q $PPID -o args=)"
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fi
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readonly pre_or_post=$1
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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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"""
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out() { printf "$1 $2\n" "${@:3}"; }
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from argparse import ArgumentParser
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from configparser import ConfigParser
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import os
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import sys
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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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def create_snapper_cmd(args, config):
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chroot = os.stat("/") != os.stat("/proc/1/root/.")
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snapper_cmd = ["snapper"]
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if chroot:
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snapper_cmd.append("--no-dbus")
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snapper_cmd.append("--config")
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snapper_cmd.append(c)
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snapper_cmd.append("create")
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snapper_cmd.append("--type")
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snapper_cmd.append(args.preorpost)
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snapper_cmd.append("--cleanup-algorithm")
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snapper_cmd.append(config.get(x, "cleanup_algorithm"))
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snapper_cmd.append("--print-number")
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snapper_cmd.append("--description")
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desc_limit = config.getint(x, "desc_limit")
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if args.preorpost == "pre":
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snapper_cmd.append(config.get(x, "pre_description")[:desc_limit])
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else:
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snapper_cmd.append(config.get(x, "post_description")[:desc_limit])
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return snapper_cmd
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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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def do_snapshot(preorpost, cmd, prefile):
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if preorpost == "pre":
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return do_pre_snapshot(cmd, prefile)
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else:
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return do_post_snapshot(cmd, prefile)
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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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def do_pre_snapshot(cmd, prefile):
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"""Run snapper command, write snapshot number to file."""
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num = os.popen(" ".join(cmd)).read().rstrip("\n")
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with open(prefile, "w") as f:
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f.write(num)
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return num
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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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def do_post_snapshot(cmd, prefile):
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"""Read pre snapshot number from file, run snapper, delete prefile."""
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cmd.append("--pre-number")
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with open(prefile, "r") as f:
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cmd.append(f.read().rstrip("\n"))
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num = os.popen(" ".join(cmd)).read().rstrip("\n")
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os.remove(prefile)
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return num
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SNAPPER_CONFIGS=$(awk -F'=' '/SNAPPER_CONFIGS/ {gsub(/"/, "", $2); print $2}' "$SNAPPER_CONFIG_FILE")
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read_config "$SNAPPAC_CONFIG_FILE"
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def get_snapper_configs(conf_file):
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"""Get the snapper configurations."""
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with open(conf_file, "r") as f:
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for line in f:
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if line.startswith("SNAPPER_CONFIGS"):
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line = line.rstrip("\n").rstrip("\"")
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line = line.split("=")
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line = line[1].lstrip("\"")
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return line.split()
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readonly DESC_LIMIT=${DESC_LIMIT:-72}
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readonly ABORT_ON_FAIL=${ABORT_ON_FAIL:-"no"}
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mapfile -t packages
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def setup_config_parser(ini_file):
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"""Set up defaults for snap-pac configuration."""
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parent_cmd = os.popen(f"ps -p {os.getppid()} -o args=").read().strip()
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packages = " ".join([line.rstrip("\n") for line in sys.stdin])
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for CONFIG in $SNAPPER_CONFIGS; do
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config = ConfigParser()
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config["DEFAULT"] = {
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"snapshot": False,
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"cleanup_algorithm": "number",
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"pre_description": "".join(["\"", parent_cmd, "\""]),
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"post_description": "".join(["\"", packages, "\""]),
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"desc_limit": 72
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}
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config["root"] = {
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"snapshot": True
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}
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config.read(ini_file)
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return config
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unset SNAPSHOT
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unset PRE_DESCRIPTION
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unset POST_DESCRIPTION
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unset CLEANUP_ALGORITHM
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read_config "/etc/snap-pac/$CONFIG.conf"
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if __name__ == "__main__":
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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:-"${packages[*]}"}
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CLEANUP_ALGORITHM=${CLEANUP_ALGORITHM:-"number"}
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snap_pac_ini = "/etc/snap-pac.ini"
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snapper_conf_file = "/etc/conf.d/snapper"
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[[ $SNAPSHOT == "no" ]] && continue
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parser = ArgumentParser()
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parser.add_argument(dest="preorpost")
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args = parser.parse_args()
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prefile="/tmp/$argv0-pre_$CONFIG"
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if [ "$(stat -c %d:%i /)" != "$(stat -c %d:%i /proc/1/root/.)" ]; then
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printf "Disabling dbus in snapper call since chroot detected.\n"
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snapper_cmd="snapper --no-dbus --config $CONFIG create --type $pre_or_post --cleanup-algorithm $CLEANUP_ALGORITHM --print-number --description"
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else
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snapper_cmd="snapper --config $CONFIG create --type $pre_or_post --cleanup-algorithm $CLEANUP_ALGORITHM --print-number --description"
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fi
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config = setup_config_parser(snap_pac_ini)
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snapper_configs = get_snapper_configs(snapper_conf_file)
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if [[ "$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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if os.getenv("SNAP_PAC_SKIP", "n") not in ["y", "Y", "yes", "Yes", "YES"]:
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for c in snapper_configs:
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done
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if c in config:
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x = c
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else:
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x = "DEFAULT"
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exit 0
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if config.getboolean(x, "snapshot"):
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prefile = f"/tmp/snap-pac-pre_{c}"
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snapper_cmd = create_snapper_cmd(args, config)
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num = do_snapshot(args.preorpost, snapper_cmd, prefile)
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print(f"==> {c}: {num}")
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else:
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print("SNAP_PAC_SKIP set, so skipping snapshots.")
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@ -1,126 +0,0 @@
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#!/usr/bin/env python
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"""
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Copyright (C) 2021 Wes Barnett
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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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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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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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"""
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from argparse import ArgumentParser
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from configparser import ConfigParser
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import os
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def create_snapper_cmd(args, config):
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chroot = os.stat("/") != os.stat("/proc/1/root/.")
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snapper_cmd = ["snapper"]
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if chroot:
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snapper_cmd.append("--no-dbus")
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snapper_cmd.append("--config")
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snapper_cmd.append(c)
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snapper_cmd.append("create")
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snapper_cmd.append("--type")
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snapper_cmd.append(args.preorpost)
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snapper_cmd.append("--cleanup-algorithm")
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snapper_cmd.append(config.get(x, "cleanup_algorithm"))
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snapper_cmd.append("--print-number")
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snapper_cmd.append("--description")
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desc_limit = config.getint(x, "desc_limit")
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if args.preorpost == "pre":
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snapper_cmd.append(config.get(x, "pre_description")[:desc_limit])
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else:
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snapper_cmd.append(config.get(x, "post_description")[:desc_limit])
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return snapper_cmd
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def do_snapshot(preorpost, cmd, prefile):
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if preorpost == "pre":
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return do_pre_snapshot(cmd, prefile)
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else:
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return do_post_snapshot(cmd, prefile)
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def do_pre_snapshot(cmd, prefile):
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"""Run snapper command, write snapshot number to file."""
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num = os.popen(" ".join(cmd)).read().rstrip("\n")
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with open(prefile, "w") as f:
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f.write(num)
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return num
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def do_post_snapshot(cmd, prefile):
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"""Read pre snapshot number from file, run snapper, delete prefile."""
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cmd.append("--pre-number")
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with open(prefile, "r") as f:
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cmd.append(f.read().rstrip("\n"))
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num = os.popen(" ".join(cmd)).read().rstrip("\n")
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os.remove(prefile)
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return num
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def get_snapper_configs(conf_file):
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"""Get the snapper configurations."""
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with open(conf_file, "r") as f:
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for line in f:
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if line.startswith("SNAPPER_CONFIGS"):
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line = line.rstrip("\n").rstrip("\"")
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line = line.split("=")
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line = line[1].lstrip("\"")
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return line.split()
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def setup_config_parser(ini_file):
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"""Set up defaults for snap-pac configuration."""
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parent_cmd = os.popen(f"ps -p {os.getppid()} -o args=").read().strip()
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config = ConfigParser()
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config["DEFAULT"] = {
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"snapshot": False,
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"cleanup_algorithm": "number",
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"pre_description": "".join(["\"", parent_cmd, "\""]),
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"post_description": "TODO",
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"desc_limit": 72
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}
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config["root"] = {
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"snapshot": True
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}
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config.read(ini_file)
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return config
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if __name__ == "__main__":
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snap_pac_ini = "/etc/snap-pac.ini"
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snapper_conf_file = "/etc/conf.d/snapper"
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parser = ArgumentParser()
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parser.add_argument(dest="preorpost")
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args = parser.parse_args()
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config = setup_config_parser(snap_pac_ini)
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snapper_configs = get_snapper_configs(snapper_conf_file)
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for c in snapper_configs:
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if c in config:
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x = c
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else:
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x = "DEFAULT"
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if config.getboolean(x, "snapshot"):
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prefile = f"/tmp/snap-pac-pre_{c}"
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snapper_cmd = create_snapper_cmd(args, config)
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num = do_snapshot(args.preorpost, snapper_cmd, prefile)
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print(f"==> {c}: {num}")
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