#!/bin/bash
#
# Copyright (C) 2006 Novell Inc.
#
# 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, write to the
# Free Software Foundation, Inc.,
# 51 Franklin Street,
# Fifth Floor,
# Boston, MA  02110-1301,
# USA.
#

function usage (){
    echo
    echo "Usage: `basename $0` [x--meta] <targetdir>"
    echo "       --meta : also create MD5SUMS.meta file"
    echo 
    echo "       Creates MD5SUMS files in each subdirectory."
    echo "       Sometimes useful for debugging inst-source problems ;-)"
    echo
    exit $1
}

if [ -z $1 ]; then
  usage 1;
fi
if [[ "$1" == "-h" ]] || [[ "$1" == "--help" ]] ; then
  usage 0;
fi

unset LANGUAGE
unset LANG
export LC_ALL=POSIX

CREATE_META=
if test "x$1" = "x--meta"; then
    CREATE_META=1
    shift
fi

ROOTDIRS="$*"
TMPFILE=/tmp/.create_md5sums.$$
MYPWD=`pwd`

test -z "$ROOTDIRS" && ROOTDIRS=$MYPWD

for ROOTDIR in $ROOTDIRS ; do
    if test "`echo $ROOTDIR | cut -c 1`" != "/" ; then
        ROOTDIR=$MYPWD/$ROOTDIR
    fi

    test -d $ROOTDIR || {
        echo "WARNING: $ROOTDIR is not a directory.  Skipping it."
    }

    for DIR in `find $ROOTDIR -type d` ; do
        cd $DIR
        FILES=$(
        for FILE in * ; do
            test -f $FILE || continue
            test -L $FILE && continue
            test -n "$MD5SUMS_SKIPFILES" && {
                IS_SKIP=false
		set -f
                for i in $MD5SUMS_SKIPFILES ; do
		    set +f
		    case $FILE in
			($i) IS_SKIP=true
			    break
			    ;;
		    esac
                done
		set +f
                test $IS_SKIP = true && continue
            }
            case $FILE in
              (*.swp|MD5SUMS*)
                continue
                ;;
              (*)
                echo $FILE
                ;;
            esac
        done)
        if test -z "$FILES" ; then
            rm -f MD5SUMS*
        else
	    echo $FILES | xargs md5sum > $TMPFILE
            test -e MD5SUMS || touch MD5SUMS
	    cmp -s $TMPFILE MD5SUMS || {
                mv $TMPFILE MD5SUMS
                echo "Info:   created MD5SUMS in $DIR"
	    }
	    if test -n "$CREATE_META"; then
		test -e MD5SUMS.meta || touch MD5SUMS.meta
		md5sum MD5SUMS > $TMPFILE
		cmp -s $TMPFILE MD5SUMS.meta || {
		    mv $TMPFILE MD5SUMS.meta
		    echo "Info:   created MD5SUMS.meta in $DIR"
		}
	    fi
            rm -f $TMPFILE
        fi
    done
done
