savelocaltweaks



#!/bin/sh

#set -e

basedir="/etc"
targetdir="/tmp/localtweaks"

for ext in .orig .old; do
    extfiles="`find $basedir -name \*$ext`"
    for extfile in $extfiles; do
        xextfile="${extfile%$ext}"
        files="$files ${xextfile#$basedir}"
    done
done

includes=""
excludes=""
if [ -d /etc/local ]; then
    if [ -r /etc/local/localtweaks.include ]; then
        includes="`cat /etc/local/localtweaks.include`"
        for include in $includes; do
            files="$files ${include#$basedir}"
        done
    fi
    if [ -r /etc/local/localtweaks.exclude ]; then
        xexcludes="`cat /etc/local/localtweaks.exclude`"
        for exclude in $xexcludes; do
            excludes="$excludes ${exclude#$basedir}"
        done
    fi
fi

# process all files once each
for file in `for x in $files; do echo $x; done | uniq | sort`; do

    for exclude in $excludes; do
        [ "$file" = "$exclude" ] && continue 2
    done

    if [ -e $basedir/${file}.orig ]; then
        ext=".orig"
    elif [ -e $basedir/${file}.old ]; then
        ext=".old"
    else
        ext=""
    fi

    newdir="$targetdir/$basedir/`dirname $file`"
    mkdir -p $newdir
    cp -af $basedir/$file $newdir

    # Only diff against existing and non-empty files.
    if [ -n "$ext" ] && [ -s $basedir/$file$ext ]; then
        diff -ruN $basedir/$file$ext $basedir/$file > $targetdir/$basedir/$file.diff
        chown --reference=$basedir/$file $targetdir/$basedir/$file.diff
        chmod --reference=$basedir/$file $targetdir/$basedir/$file.diff
        chmod a-x $targetdir/$basedir/$file.diff
    fi
done