#!/bin/bash

EXCLUSIONS="--exclude=ibmsdk --exclude=Jamfile --exclude=Makefile.am --exclude=CMakeLists.txt --exclude=Doxyfile"

pushd libraries/bullet

if [ "$#" -ne "1" ]
then
	echo usage: $0 \<bullet_source_tarball\> >&2
	exit 1
fi
tar xvzf "$1" ${EXCLUSIONS} bullet-2.??/src

rsync -av bullet-2.??/src/* .
rm -rf bullet-2.??

DIRS=`find . -type d ! -name CVS ! -name .deps`
MAKEFILES=""

for dir in ${DIRS}
do
	SUBDIRS=""
	SOURCES=""
	MAKEFILE="${dir}/Makefile.am"
	# Build a list of subdirectories and sources
	for entry in $dir/*
	do
		filename=`basename ${entry}`
		if [ -d ${entry} ] && [ ${filename} != "CVS" ]
		then
			SUBDIRS="${SUBDIRS} ${filename}"
		fi
		if [ -f ${entry} ] && [ ${filename: -4:4} == ".cpp" -o ${filename: -2:2} == ".h" ]
		then
			SOURCES="${SOURCES} ${filename}"
		fi
	done
	# Create a temporary file to contain the new Makefile.am
	echo > ${MAKEFILE}_tmp
	# Add the subdirectories to the new Makefile.am
	if [ -n "${SUBDIRS}" ]
	then
		echo -e "SUBDIRS = ${SUBDIRS}\n" >> ${MAKEFILE}_tmp
	fi
	# Add the sources to the new Makefile.am
	if [ -n "${SOURCES}" ]
	then
		# The top level directory of bullet has only headers.
		if [ ${dir} = "." ]
		then
			echo -e "noinst_HEADERS = ${SOURCES}\n" >> ${MAKEFILE}_tmp
		else
			libname="lib`basename ${dir}`"
			echo -e "noinst_LIBRARIES = ${libname}.a\n" >> ${MAKEFILE}_tmp
			echo -e "INCLUDES = -I\$(top_srcdir)/libraries/bullet\n" >> ${MAKEFILE}_tmp
			echo -e "${libname}_a_SOURCES = ${SOURCES}\n" >> ${MAKEFILE}_tmp
		fi
	fi
	# If Makefile.am is new or changed, move it to the right name.
	if [ ! -f ${MAKEFILE} ] || ! cmp ${MAKEFILE}_tmp ${MAKEFILE}
	then
		mv -f ${MAKEFILE}_tmp ${MAKEFILE}
	else
		echo ${MAKEFILE} unchanged.
		rm -f ${MAKEFILE}_tmp
	fi
	# Strip off the leading ./ and add the filename to the list to
	# be checked against the contents of configure.ac
	if [ ${MAKEFILE:0:2} = "./" ]
	then
		MAKEFILE=${MAKEFILE:2}
	fi
	MAKEFILES="${MAKEFILES}\tlibraries/bullet/${MAKEFILE%%.*}\n"
done

echo Check the following files are in configure.ac:
echo -e ${MAKEFILES}