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pacman/contrib/pacdiff
Xavier Chantry dce7aa8569 contrib/pacdiff : rework and cleanup
I initially only wanted to add a -l/--locate option to use locate instead of
find, which should have been easy.

Then I thought I would try to support filename with whitespace while I was
at it, and this was a bit more complex. The safest ways seem to be the
following ones : http://mywiki.wooledge.org/BashFAQ/020

Then I received a lot of suggestions on #bash about how to improve the
script, which I tried to address.

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
[Dan: fix grouping of find arguments]
Signed-off-by: Dan McGee <dan@archlinux.org>
2009-02-18 19:20:10 -06:00

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#!/bin/bash
# pacdiff : a simple pacnew/pacorig/pacsave updater
#
# Copyright (c) 2007 Aaron Griffin <aaronmgriffin@gmail.com>
#
# 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/>.
#
diffprog=${DIFFPROG:-vimdiff}
locate=0
usage() {
echo "pacdiff : a simple pacnew/pacorig/pacsave updater"
echo "Usage : pacdiff [-l]"
echo "The -l/--locate flag makes pacdiff use locate rather than find"
}
cmd() {
if [ $locate -eq 1 ]; then
locate -0 -e -b \*.pacnew \*.pacorig \*.pacsave
else
find /etc/ \( -name \*.pacnew -o -name \*.pacorig -o -name \*.pacsave \) -print0
fi
}
if [ $# -gt 0 ]; then
case $1 in
-l|--locate)
locate=1;;
*)
usage; exit 0;;
esac
fi
# see http://mywiki.wooledge.org/BashFAQ/020
while IFS= read -u 3 -r -d '' pacfile; do
file="${pacfile%.pac*}"
echo "File: $file"
if [ ! -f "$file" ]; then
echo " $file does not exist"
rm -i "$pacfile"
continue
fi
check="$(cmp "$pacfile" "$file")"
if [ -z "${check}" ]; then
echo " Files are identical, removing..."
rm "$pacfile"
else
echo -n " File differences found. (V)iew, (S)kip, (R)emove: [v/s/r] "
while read c; do
case $c in
r|R) rm "$pacfile"; break ;;
v|V)
$diffprog "$pacfile" "$file"
rm -i "$pacfile"; break ;;
s|S) break ;;
*) echo -n " Invalid answer. Try again: [v/s/r] "; continue ;;
esac
done
fi
done 3< <(cmd)
exit 0
# vim: set ts=2 sw=2 noet: