#!/bin/bash
#
set -e

cd "$(dirname "$0")/.."

if ! [ -e src/parser/cvc/Cvc.g ]; then
  echo "$(basename $0): I expect to be in the contrib/ of a CVC4 source tree," >&2
  echo "but apparently:" >&2
  echo >&2
  echo "  $(pwd)" >&2
  echo >&2
  echo "is not a CVC4 source tree ?!" >&2
  exit 1
fi

function webget {
  if which wget &>/dev/null; then
    wget -c -O "$2" "$1"
  elif which curl &>/dev/null; then
    curl "$1" >"$2"
  else
    echo "Can't figure out how to download from web.  Please install wget or curl." >&2
    exit 1
  fi
}

set -x
mkdir -p antlr-3.4/share/java
mkdir -p antlr-3.4/bin
mkdir -p antlr-3.4/src
cd antlr-3.4
webget http://antlr.org/download/antlr-3.4-complete.jar share/java/antlr-3.4-complete.jar 
webget http://antlr.org/download/C/libantlr3c-3.4.tar.gz src/libantlr3c-3.4.tar.gz
tee bin/antlr3 <<EOF
#!/bin/sh
export CLASSPATH=/usr/share/java/stringtemplate.jar:`pwd`/share/java/antlr-3.4-complete.jar:\$CLASSPATH
exec java org.antlr.Tool "\$@"
EOF
chmod a+x bin/antlr3
cd src
tar xfzv libantlr3c-3.4.tar.gz
cd libantlr3c-3.4
./configure --enable-64bit --prefix=`pwd`/../..
cp Makefile Makefile.orig
sed 's,^\(CFLAGS = .*\),\1 -fexceptions,' Makefile.orig > Makefile
make
make install
set +x
cd ../../..

echo
echo Invalidating generated parsers..
touch src/parser/*/*.g

echo
echo ===================== Now configure CVC4 with =====================
echo ./configure --with-antlr-dir=`pwd`/antlr-3.4 ANTLR=`pwd`/antlr-3.4/bin/antlr3