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#!/bin/bash
# pacdiff : a simple pacnew/pacorig/pacsave updater
#
# Copyright (c) 2007 Aaron Griffin <aaronmgriffin@gmail.com>
# Copyright (c) 2013 Pacman Development Team <pacman-dev@archlinux.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
shopt -s extglob
declare -r myname='pacdiff'
declare -r myver='@PACKAGE_VERSION@'
diffprog=${DIFFPROG:-vimdiff}
diffsearchpath=${DIFFSEARCHPATH:-/etc}
USE_COLOR='y'
declare -a oldsaves
declare -i USE_FIND=0 USE_LOCATE=0 USE_PACDB=0 OUTPUTONLY=0
m4_include(../scripts/library/output_format.sh)
usage() {
cat <<EOF
${myname} (pacman) v${myver}
A simple program to merge or remove pacnew/pacorig/pacsave files.
Usage: $myname [-l | -f | -p] [--nocolor]
Search Options: select one, default: pacmandb
-l/--locate scan using locate
-f/--find scan using find
-p/--pacmandb scan active config files from pacman database
General Options:
-o/--output print files instead of merging them
--nocolor remove colors from output
Environment Variables:
DIFFPROG override the merge program: (default: vimdiff)
DIFFSEARCHPATH override the search path. (only when using find)
(default: /etc)
Example: DIFFPROG=meld DIFFSEARCHPATH="/boot /etc /usr" $myname
Example: $myname --output --locate
EOF
}
version() {
printf "%s %s\n" "$myname" "$myver"
echo 'Copyright (C) 2007 Aaron Griffin <aaronmgriffin@gmail.com>'
echo 'Copyright (C) 2013 Pacman Development Team <pacman-dev@archlinux.org>'
}
print_existing() {
[[ -f "$1" ]] && printf '%s\0' "$1"
}
print_existing_pacsave(){
for f in "${1}"?(.+([0-9])); do
[[ -f $f ]] && printf '%s\0' "$f"
done
}
cmd() {
if (( USE_LOCATE )); then
locate -0 -e -b \*.pacnew \*.pacorig \*.pacsave '*.pacsave.[0-9]*'
elif (( USE_FIND )); then
find $diffsearchpath \( -name \*.pacnew -o -name \*.pacorig -o -name \*.pacsave -o -name '*.pacsave.[0-9]*' \) -print0
elif (( USE_PACDB )); then
awk '/^%BACKUP%$/ {
while (getline) {
if (/^$/) { nextfile }
print $1
}
}' "${pac_db}"/*/files | while read -r bkup; do
print_existing "/$bkup.pacnew"
print_existing "/$bkup.pacorig"
print_existing_pacsave "/$bkup.pacsave"
done
fi
}
while [[ -n "$1" ]]; do
case "$1" in
-l|--locate)
USE_LOCATE=1;;
-f|--find)
USE_FIND=1;;
-p|--pacmandb)
USE_PACDB=1;;
-o|--output)
OUTPUTONLY=1;;
--nocolor)
USE_COLOR='n';;
-V|--version)
version; exit 0;;
-h|--help)
usage; exit 0;;
*)
usage; exit 1;;
esac
shift
done
m4_include(../scripts/library/term_colors.sh)
if ! type -p $diffprog >/dev/null; then
error "Cannot find the $diffprog binary required for viewing differences."
exit 1
fi
case $(( USE_FIND + USE_LOCATE + USE_PACDB )) in
0) USE_PACDB=1;; # set the default search option
[^1]) error "Only one search option may be used at a time"
usage; exit 1;;
esac
if (( USE_PACDB )); then
if [[ ! -r @sysconfdir@/pacman.conf ]]; then
error "unable to read @sysconfdir@/pacman.conf"
usage; exit 1
fi
eval $(awk '/DBPath/ {print $1$2$3}' @sysconfdir@/pacman.conf)
pac_db="${DBPath:-@localstatedir@/lib/pacman/}local"
if [[ ! -d "${pac_db}" ]]; then
error "unable to read pacman db %s". "${pac_db}"
usage; exit 1
fi
fi
# see http://mywiki.wooledge.org/BashFAQ/020
while IFS= read -u 3 -r -d '' pacfile; do
file="${pacfile%.pac*}"
file_type="pac${pacfile##*.pac}"
if (( OUTPUTONLY )); then
echo "$pacfile"
continue
fi
# add matches for pacsave.N to oldsaves array, do not prompt
if [[ $file_type = pacsave.+([0-9]) ]]; then
oldsaves+=("$pacfile")
continue
fi
msg "%s file found for %s" "$file_type" "$file"
if [ ! -f "$file" ]; then
warning "$file does not exist"
rm -iv "$pacfile"
continue
fi
if cmp -s "$pacfile" "$file"; then
msg2 "Files are identical, removing..."
rm -v "$pacfile"
else
ask "(V)iew, (S)kip, (R)emove %s, (O)verwrite with %s, (Q)uit: [v/s/r/o/q] " "$file_type" "$file_type"
while read c; do
case $c in
q|Q) exit 0;;
r|R) rm -v "$pacfile"; break ;;
o|O) mv -v "$pacfile" "$file"; break ;;
v|V)
$diffprog "$pacfile" "$file"
rm -iv "$pacfile"; break ;;
s|S) break ;;
*) ask "Invalid answer. Try again: [v/s/r/o/q] "; continue ;;
esac
done
fi
done 3< <(cmd)
(( ${#oldsaves[@]} )) && warning "Ignoring %s" "${oldsaves[@]}"
exit 0
# vim: set ts=2 sw=2 noet:
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