contrib/pacdiff.in

   1 #!/bin/bash
   2 #   pacdiff : a simple pacnew/pacorig/pacsave updater
   3 #
   4 #   Copyright (c) 2007 Aaron Griffin <aaronmgriffin@gmail.com>
   5 #
   6 #   This program is free software; you can redistribute it and/or modify
   7 #   it under the terms of the GNU General Public License as published by
   8 #   the Free Software Foundation; either version 2 of the License, or
   9 #   (at your option) any later version.
  10 #
  11 #   This program is distributed in the hope that it will be useful,
  12 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 #   GNU General Public License for more details.
  15 #
  16 #   You should have received a copy of the GNU General Public License
  17 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 #
  19
  20 declare -r myname='pacdiff'
  21
  22 diffprog=${DIFFPROG:-vimdiff}
  23 diffsearchpath=${DIFFSEARCHPATH:-/etc}
  24 locate=0
  25
  26 usage() {
  27         echo "$myname : a simple pacnew/pacorig/pacsave updater"
  28         echo "Usage : $myname [-l]"
  29         echo "  -l/--locate makes $myname use locate rather than find"
  30         echo "  DIFFPROG variable allows to override the default vimdiff"
  31         echo "  DIFFSEARCHPATH allows to override the default /etc path"
  32         echo "Example : DIFFPROG=meld DIFFSEARCHPATH=\"/boot /etc /usr\" $myname"
  33 }
  34
  35 cmd() {
  36         if [ $locate -eq 1 ]; then
  37                 locate -0 -e -b \*.pacnew \*.pacorig \*.pacsave
  38         else
  39                 find $diffsearchpath \( -name \*.pacnew -o -name \*.pacorig -o -name \*.pacsave \) -print0
  40         fi
  41 }
  42
  43 if [ $# -gt 0 ]; then
  44         case $1 in
  45                 -l|--locate)
  46                 locate=1;;
  47                 *)
  48                 usage; exit 0;;
  49         esac
  50 fi
  51
  52 # see http://mywiki.wooledge.org/BashFAQ/020
  53 while IFS= read -u 3 -r -d '' pacfile; do
  54         file="${pacfile%.pac*}"
  55         echo "File: $file"
  56         if [ ! -f "$file" ]; then
  57                 echo "  $file does not exist"
  58                 rm -i "$pacfile"
  59                 continue
  60         fi
  61         check="$(cmp "$pacfile" "$file")"
  62         if [ -z "${check}" ]; then
  63                 echo "  Files are identical, removing..."
  64                 rm "$pacfile"
  65         else
  66                 echo -n "  File differences found. (V)iew, (S)kip, (R)emove: [v/s/r] "
  67                 while read c; do
  68                         case $c in
  69                                 r|R) rm "$pacfile"; break ;;
  70                                 v|V)
  71                                 $diffprog "$pacfile" "$file"
  72                                 rm -i "$pacfile"; break ;;
  73                                 s|S) break ;;
  74                                 *) echo -n "  Invalid answer. Try again: [v/s/r] "; continue ;;
  75                         esac
  76                 done
  77         fi
  78 done 3< <(cmd)
  79
  80 exit 0
  81
  82 # vim: set ts=2 sw=2 noet: