#!/bin/bash
#
# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code 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
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

script_dir=`dirname $0`

# Create a timestamp as seconds since epoch
if test "x`uname -s`" = "xSunOS"; then
  TIMESTAMP=`date +%s`
  if test "x$TIMESTAMP" = "x%s"; then
    # date +%s not available on this Solaris, use workaround from nawk(1):
    TIMESTAMP=`nawk 'BEGIN{print srand()}'`
  fi
else
  TIMESTAMP=`date +%s`
fi

if test "x$CUSTOM_CONFIG_DIR" = "x"; then
  custom_script_dir="$script_dir/../../jdk/make/closed/autoconf"
else
  custom_script_dir=$CUSTOM_CONFIG_DIR
fi

custom_hook=$custom_script_dir/custom-hook.m4

AUTOCONF="`which autoconf 2> /dev/null | grep -v '^no autoconf in'`"

echo "Autoconf found: ${AUTOCONF}"

if test "x${AUTOCONF}" = x; then
  echo You need autoconf installed to be able to regenerate the configure script
  echo Error: Cannot find autoconf 1>&2
  exit 1
fi

echo Generating generated-configure.sh with ${AUTOCONF}
cat $script_dir/configure.ac  | sed -e "s|@DATE_WHEN_GENERATED@|$TIMESTAMP|" | ${AUTOCONF} -W all -I$script_dir - > $script_dir/generated-configure.sh
rm -rf autom4te.cache

if test -e $custom_hook; then
  echo Generating custom generated-configure.sh
  # We have custom sources available; also generate configure script
  # with custom hooks compiled in.
  cat $script_dir/configure.ac | sed -e "s|@DATE_WHEN_GENERATED@|$TIMESTAMP|" | \
      sed -e "s|#CUSTOM_AUTOCONF_INCLUDE|m4_include([$custom_hook])|" | ${AUTOCONF} -W all -I$script_dir - > $custom_script_dir/generated-configure.sh
  rm -rf autom4te.cache
else
  echo No custom hook found:  $custom_hook
fi