#!/bin/sh
#
# mkarchive --
# create a archive with time-stamp
#
# Modified:
#   * 2000/01/03: use `date +%Y` as the number of year.
#
# Require:
#   gzip(bzip,jar),tar,date
#
# Usage:
#   mkarchive [-gzip|-bzip|-jar] [-C directory]
#             [-f archive-name] [-v] target-directory
#
#   -gzip:   use tar and gzip (default)
#   -bzip:   use tar and bzip2
#   -jar:    use jar (java archiver)
#   -C:      change directory
#   -f:      archive name (default: target-directory-date.tar.gz)
#   -v:      verbose mode

TAR=tar
GZIP=gzip
BZIP=bzip2
JAR=jar
SUFFIX="tar.gz"
DATE=`date +%Y%m%d`
TARGETDIR=
PWD=`pwd`
TMPDIR=.
ARCHIVE=
VERBOSE="no"

while test "$1" != ""
do
    case "$1"
    in
    "-h") echo "Copyright (C) 1999 Takaaki Tateishi"
          echo
          echo "mkarchive [-h] [-C directory] [-f archive-name]"
          echo "          [-gzip|-bzip|-jar] [-T tmp-dir]"
	  echo "          target-directory  "
          exit;;
    "-C") shift; PWD=$1; shift;;
    "-f") shift; ARCHIVE=$1; shift;;
    "-gzip") shift; SUFFIX="tar.gz";;
    "-bzip") shift; SUFFIX="tar.bz2";;
    "-jar") shift; SUFFIX="jar";;
    "-v") shift; VERBOSE="yes";;
    "-T") shift; TMPDIR=$1;;
    "-"*) echo "unknown option: \"$1\""; shift;;
    *) TARGET=$1; shift;;
    esac
done

TMP=$TMPDIR/archive-$DATE

case "$TARGET"
in
*/) echo "'/' is wrong"; exit;;
""|"."|"..") echo \"$TARGET\" : no such directory!; exit;;
esac

if test "$ARCHIVE" = ""
then
    ARCHIVE=$TARGET-$DATE.$SUFFIX
    if test -f $ARCHIVE
    then
	NUM=1
	ARCHIVE=$TARGET-$DATE-$NUM.$SUFFIX
	while test -f $ARCHIVE
	do
	    NUM=`expr $NUM + 1`
	    ARCHIVE=$TARGET-$DATE-$NUM.$SUFFIX
	done
    fi
fi

if test "$VERBOSE" = "yes"
then
    echo "TAR = $TAR"
    echo "BZIP = $BZIP"
    echo "JAR = $JAR"
    echo "SUFFIX = $SUFFIX"
    echo "ARCHIVE = $ARCHIVE"
    echo "PWD = $PWD"
    echo "TMP = $TMP"
    echo -n "are you ready? [y/n]"
    read ans
    case $ans
    in
	"y"|"Y"|"yes");;
	*) exit;;
    esac
fi

case "$SUFFIX"
in
    "tar.gz") $TAR -cf $TMP.tar -C $PWD $TARGET
              $GZIP $TMP.tar
	      mv $TMP.tar.gz $ARCHIVE;;
    "tar.bz2") $TAR -cf $TMP.tar -C $PWD $TARGET
	       $BZIP $TMP.tar
	       mv $TMP.tar.bz2 $ARCHIVE;;
    "jar") $JAR -cf $ARCHIVE -C $PWD $TARGET;;
esac