#!/bin/bash

[[ -z $1 ]] && echo "usage $0 <soversion>" && exit 1

soversion=${1}

if [[ -n $2 ]]; then
	shift
	for f in $@; do
		if [[ -n `sed -ne '/^.*_la_LDFLAGS\s*=.*$/p' "${f}"` ]]; then	# _LDFLAGS specified, append
			if [[ -n `sed -ne '/^.*_la_LDFLAGS\s*=.*-version-info/p' "${f}"` ]]; then	# -version-info specified
				sed -e "/_la_LDFLAGS\s*=/s/-version-info\s\+\S\+\s*/-version-info ${soversion}/g" \
					-i "${f}" || echo 'failed to replace soversion'
			else
				sed -e "/_la_LDFLAGS\s*=/s/$/ -version-info ${soversion}/g" \
					-i "${f}" || echo 'failed to append soversion'
			fi
		else	# _LDFLAGS not specified, set -version-info just before _SOURCES
			sed -e "s/^\(.*\)_SOURCES.*$/\1_LDFLAGS = -version-info ${soversion}\n&/g" \
				-i "${f}" || echo 'failed to set soversion'
		fi
	done
	exit 0
fi

echo 'Patching automake'
find -name '*.am' \
	-exec sed -e 's|\.a|.la|g' -i {} + \
	-exec sed -e 's|_a_SOURCES|_la_SOURCES|g' -i {} + \
	-exec sed -e 's|_a_LIBADD|_la_LIBADD|g' -i {} + \
	-exec sed -e 's|_a_DEPENDENCIES|_la_DEPENDENCIES|g' -i {} + \
	-exec sed -e 's|_a_CXXFLAGS|_la_CXXFLAGS|g' -i {} + \
	-exec sed -e 's|_a_LDFLAGS|_la_LDFLAGS|g' -i {} + \
	-exec sed -e 's|^lib_LIBRARIES|lib_LTLIBRARIES|g' -i {} + \
	-exec "$0" ${soversion} {} + \
	|| echo 'failed to switch to shared libs'

acfile=
if [[ -f configure.ac ]]; then
	acfile=configure.ac
elif [[ -f configure.in ]]; then
	acfile=configure.in
fi

if [[ -n ${acfile} ]]; then
	echo 'Patching autoconf'
	sed -e 's/AC_PROG_RANLIB/AC_PROG_LIBTOOL/g' -i ${acfile} \
		|| echo 'failed to enable libtool'
fi