#!/bin/sh

DEFAULTDEST="/usr/share/games/stratagus/wargus"

SOURCE="$1"
DEST="${2:-$DEFAULTDEST}"
WARTOOL="${WARTOOL:-wartool}"

SELF="$( basename "$0" )"
if [ -z "$SOURCE" ]; then
  cat <<EOF
$SELF - extract game data files from Warcraft II

Usage: $SELF [source] <dest>

source is one of:

- A block device node or symlink to one (e.g. /dev/cdrom). The
  device must contain a Warcraft II CD-ROM.

- An ISO image of the Warcraft II CD-ROM.

- A directory containing an installed copy of Warcraft II.

- A zip, rar, 7z, or tar.(gz|xz|bz2) archive containing either the
  contents of the Warcraft II CD-ROM or an installed copy of the game
  (but NOT an archive containing an ISO image).

By "Warcraft II", we mean the original DOS version (or the expansion
pack for the DOS version), *not* the Battle.net edition. The expansion
is probably preferable (has more maps), but either one will work.

Filename case inside archives is ignored.

dest is the optional directory to output extracted data to. If not
given, $DEFAULTDEST is used.

Since this script wants to do things like mount CDs and write to
/usr/share, it generally needs to be run as root.

For extracting 7z or rar archives, you will need p7zip or unrar.

This script was written by B. Watson for the SlackBuilds.org
project and is released under the terms of the WTFPL. See
http://www.wtfpl.net/txt/copying/ for details.
EOF
  exit 0
fi

# try to figure out what $SOURCE is. It can be the CD-ROM, an ISO
# image, an installed directory, or a zip/rar/7z/tar/etc archive
# of an installed dir or the contents of the CD.

# NOT supported: archives containing the .iso image.

SOURCE=$( readlink -q -n -f "$SOURCE" )
TYPE=$( file "$SOURCE" )

SRCDIR=$( mktemp -d -t extract-warcraft2.XXXXXX )

case "$TYPE" in
  *directory*) rm -rf "$SRCDIR" ; SRCDIR="$SOURCE" ; KEEPSRC="yes" ;;

  *block*special*)
    mount "$SOURCE" "$SRCDIR"
    MOUNTED="$SRCDIR"
	 ROPT="-r"
  ;;

  *ISO*9660*data*)
    mount -o loop "$SOURCE" "$SRCDIR"
    MOUNTED="$SRCDIR"
  ;;

  *7-zip*)
    ( cd "$SRCDIR" && 7za x "$SOURCE" )
  ;;

  *RAR*arch*)
    ( cd "$SRCDIR" && unrar x "$SOURCE" )
  ;;

  *Zip*arch*)
    ( cd "$SRCDIR" && unzip "$SOURCE" )
  ;;

  *gzip*|*bzip2*|*XZ*)
    ( cd "$SRCDIR" && tar xvf "$SOURCE" )
  ;;

  *)
    echo "Can't figure out what '$SOURCE' is, aborting" 1>&2
    exit 1
  ;;
esac

# now find the data dir, if it exists
DATADIR="$SRCDIR"
for i in data DATA Data; do
  if [ -d "$SRCDIR/$i" ]; then
    DATADIR="$SRCDIR/$i"
  fi
done

# sanity check the data dir we think we found
for i in REZDAT rezdat Rezdat; do
  if [ -e "$DATADIR/$i.war" ] ||
     [ -e "$DATADIR/$i.WAR" ] ||
     [ -e "$DATADIR/$i.War" ]
  then
    FOUND=yes
  fi
done

if [ "$FOUND" != "yes" ]; then
  echo "Can't find rezdat.war in $DATADIR, aborting" 1>&2 &&
  exit 1
fi

mkdir -p $DEST
# 20150510 bkw: wartool lost its -m option since last update.
"$WARTOOL" -v $ROPT "$DATADIR" "$DEST"

if [ "$MOUNTED" != "" ]; then
  umount "$MOUNTED"
fi

if [ "$KEEPSRC" != "yes" ]; then
  rm -rf "$SRCDIR"
fi