contrib/pacdiff.sh.in

   1 #!/bin/bash
   2 #   pacdiff : a simple pacnew/pacorig/pacsave updater
   3 #
   4 #   Copyright (c) 2007 Aaron Griffin <aaronmgriffin@gmail.com>
   5 #   Copyright (c) 2013 Pacman Development Team <pacman-dev@archlinux.org>
   6 #
   7 #   This program is free software; you can redistribute it and/or modify
   8 #   it under the terms of the GNU General Public License as published by
   9 #   the Free Software Foundation; either version 2 of the License, or
  10 #   (at your option) any later version.
  11 #
  12 #   This program is distributed in the hope that it will be useful,
  13 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 #   GNU General Public License for more details.
  16 #
  17 #   You should have received a copy of the GNU General Public License
  18 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 shopt -s extglob
  22
  23 declare -r myname='pacdiff'
  24 declare -r myver='@PACKAGE_VERSION@'
  25
  26 diffprog=${DIFFPROG:-vimdiff}
  27 diffsearchpath=${DIFFSEARCHPATH:-/etc}
  28 USE_COLOR='y'
  29 declare -a oldsaves
  30 declare -i USE_FIND=0 USE_LOCATE=0 USE_PACDB=0
  31
  32 m4_include(../scripts/library/output_format.sh)
  33
  34 usage() {
  35         cat <<EOF
  36 $myname is a simple pacnew/pacorig/pacsave updater.
  37
  38 Usage: $myname [-l | -f | -p] [--nocolor]
  39
  40 Search Options:     select one, default: pacmandb
  41   -l/--locate       scan using locate
  42   -f/--find         scan using find
  43   -p/--pacmandb     scan active config files from pacman db
  44
  45 General Options:
  46   --nocolor         remove colors from output
  47
  48 Enviroment Variables:
  49   DIFFPROG          override the merge program: (default: vimdiff)
  50   DIFFSEARCHPATH    override the search path. (only when using find)
  51                     (default: /etc)
  52
  53 Example: DIFFPROG=meld DIFFSEARCHPATH="/boot /etc /usr" $myname
  54
  55 EOF
  56 }
  57
  58 version() {
  59         printf "%s %s\n" "$myname" "$myver"
  60         echo 'Copyright (C) 2007 Aaron Griffin <aaronmgriffin@gmail.com>'
  61         echo 'Copyright (C) 2013 Pacman Development Team <pacman-dev@archlinux.org>'
  62 }
  63
  64 print_existing() {
  65         [[ -f "$1" ]] && printf '%s\0' "$1"
  66 }
  67
  68 print_existing_pacsave(){
  69         for f in "${1}"?(.+([0-9])); do
  70                 [[ -f $f ]] && printf '%s\0' "$f"
  71         done
  72 }
  73
  74 cmd() {
  75         if (( USE_LOCATE )); then
  76                 locate -0 -e -b \*.pacnew \*.pacorig \*.pacsave '*.pacsave.[0-9]*'
  77         elif (( USE_FIND )); then
  78                 find $diffsearchpath \( -name \*.pacnew -o -name \*.pacorig -o -name \*.pacsave -o -name '*.pacsave.[0-9]*' \) -print0
  79         elif (( USE_PACDB )); then
  80                 awk '/^%BACKUP%$/ {
  81                 while (getline) {
  82                         if (/^$/) { nextfile }
  83                                 print $1
  84                         }
  85                 }' "${pac_db}"/*/files | while read -r bkup; do
  86                         print_existing "/$bkup.pacnew"
  87                         print_existing "/$bkup.pacorig"
  88                         print_existing_pacsave "/$bkup.pacsave"
  89                 done
  90         fi
  91 }
  92
  93 while [[ -n "$1" ]]; do
  94         case "$1" in
  95                 -l|--locate)
  96                         USE_LOCATE=1;;
  97                 -f|--find)
  98                         USE_FIND=1;;
  99                 -p|--pacmandb)
 100                         USE_PACDB=1;;
 101                 --nocolor)
 102                         USE_COLOR='n';;
 103                 -V|--version)
 104                         version; exit 0;;
 105                 -h|--help)
 106                         usage; exit 0;;
 107                 *)
 108                         usage; exit 1;;
 109         esac
 110         shift
 111 done
 112
 113 m4_include(../scripts/library/term_colors.sh)
 114
 115 case $(( USE_FIND + USE_LOCATE + USE_PACDB )) in
 116         0) USE_PACDB=1;; # set the default search option
 117         [^1]) error "Only one search option may be used at a time"
 118                 usage; exit 1;;
 119 esac
 120
 121 if (( USE_PACDB )); then
 122         if [[ ! -r @sysconfdir@/pacman.conf ]]; then
 123                 error "unable to read @sysconfdir@/pacman.conf"
 124                 usage; exit 1
 125         fi
 126
 127         eval $(awk '/DBPath/ {print $1$2$3}' @sysconfdir@/pacman.conf)
 128         pac_db="${DBPath:-@localstatedir@/lib/pacman/}local"
 129         if [[ ! -d "${pac_db}" ]]; then
 130                 error "unable to read pacman db %s". "${pac_db}"
 131                 usage; exit 1
 132         fi
 133 fi
 134
 135 # see http://mywiki.wooledge.org/BashFAQ/020
 136 while IFS= read -u 3 -r -d '' pacfile; do
 137         file="${pacfile%.pac*}"
 138         file_type="pac${pacfile##*.pac}"
 139
 140         # add matches for pacsave.N to oldsaves array, do not prompt
 141         if [[ $file_type = pacsave.+([0-9]) ]]; then
 142                 oldsaves+=("$pacfile")
 143                 continue
 144         fi
 145
 146         msg "%s file found for %s" "$file_type" "$file"
 147         if [ ! -f "$file" ]; then
 148                 warning "$file does not exist"
 149                 rm -iv "$pacfile"
 150                 continue
 151         fi
 152
 153         if cmp -s "$pacfile" "$file"; then
 154                 msg2 "Files are identical, removing..."
 155                 rm -v "$pacfile"
 156         else
 157                 ask "(V)iew, (S)kip, (R)emove %s, (O)verwrite with %s, (Q)uit: [v/s/r/o/q] " "$file_type" "$file_type"
 158                 while read c; do
 159                         case $c in
 160                                 q|Q) exit 0;;
 161                                 r|R) rm -v "$pacfile"; break ;;
 162                                 o|O) mv -v "$pacfile" "$file"; break ;;
 163                                 v|V)
 164                                         $diffprog "$pacfile" "$file"
 165                                         rm -iv "$pacfile"; break ;;
 166                                 s|S) break ;;
 167                                 *) ask "Invalid answer. Try again: [v/s/r/o/q] "; continue ;;
 168                         esac
 169                 done
 170         fi
 171 done 3< <(cmd)
 172
 173 (( ${#oldsaves[@]} )) && warning "Ignoring %s" "${oldsaves[@]}"
 174
 175 exit 0
 176
 177 # vim: set ts=2 sw=2 noet: