savelocaltweaks



#!/bin/sh

set -e

targetdir=/tmp/localtweaks

origfiles="`cd /etc && find . -name '*.orig'`"
oldfiles="`cd /etc && find . -name '*.old'`"
includes=""
excludes=""
if [ -d /etc/local ]; then
    if [ -r /etc/local/localtweaks.include ]; then
        includes="`cat /etc/local/localtweaks.include`"
    fi
    if [ -r /etc/local/localtweaks.exclude ]; then
        excludes="`cat /etc/local/localtweaks.exclude`"
    fi
fi

files="$origfiles $oldfiles $includes"

# process all *.{orig,old} once each
for file in `for x in $files; do echo $x; done | uniq | sort`; do
    olddir="/etc/`dirname $file`"
    newdir="$targetdir/`dirname $file`"
    oldname="`basename $file`"
    newname="`basename $file .orig`"
    for exclude in $excludes; do
        [ "$newname" = "$exclude" ] && continue 2
    done
    if [ ! -e $olddir/$newname.orig ]; then
        newname="`basename $file .old`"
    fi
    if [ "$oldname" = "$newname" ]; then
        echo "FATAL: file is neither .orig nor .old: \"$file\"!"
        exit 1
    fi
    if [ ! -e $olddir/$oldname ]; then
        echo "FATAL: file found disappeared again: \"$file\"!"
        exit 1
    fi
    mkdir -p $newdir
    cp -af $olddir/$newname $newdir

    # Only diff against non-empty files.
    if [ -s $olddir/$oldname ]; then
        diff -ruN $olddir/$oldname $olddir/$newname > $newdir/$newname.diff
        chown --reference=$olddir/$newname $newdir/$newname.diff
        chmod --reference=$olddir/$newname $newdir/$newname.diff
        chmod a-x $newdir/$newname.diff
    fi
done