#!/bin/sh
# 
# $Id: configure,v 1.4 2006/09/15 14:16:55 toad32767 Exp $
# 
# Configure script for UModPlayer B3
# This is a very small & simple script which modifies the Makefile
# to set a user-specified prefix.
# Its options are more or less the same that of GNU autoconf configure scripts.
# 
# All of this code is under Public Domain. In case it's not legally possible,
# permission is granted to anyone to use it for any purpose.

# display the usage
usage () {
	echo "usage: $0 [--prefix=<prefix>]"
}

# replace (escape) the '/' character with '\/'
addslashes () {
	# sed s:/:\/:g
	echo "$1" | sed 's/\//\\\//g'
}

# test if we have arguments
if [ $# -gt 0 ]
then
	if [ "$1" = "--help" ]
	then
		usage
		exit 0
	else
		prefix=`echo "$1" | sed 's/^\([^=]*=\)//g'`
		if [ "$prefix" = "" ]
		then
			usage
			exit 1
		fi
	fi
else
	# default prefix
	prefix="/usr/local"
fi

if [ ! -r Makefile.in ]
then
	echo "error: missing or unreadable <Makefile.in>"
	exit 2
fi

# replace the @PREFIX@ tag with the appropriate content
prefix=`addslashes "$prefix"`
os=`uname`

echo "$0: creating Makefile"

# some preprocessing. see the Makefile.in file for comments
if [ "$os" = "NetBSD" ]
then
	prg1='awk'
	param1='/^@if_NetBSD@/ {gsub(/\@\@ /, "\n"); gsub(/\@[^\@]*\@/, "");} {print $0;}'
else
	prg1='sed'
	param1='s/^@if_NetBSD.*$//g'
fi

if (test -d /usr/local/include && test -d /usr/local/lib)
then
	prg2='awk'
	param2='/^@if_usr_local@/ {gsub(/\@\@ /, "\n"); gsub(/\@[^\@]*\@/, "");} {print $0;}'
else
	prg2='sed'
	param2='s/^@if_usr_local.*$//g'
fi

sed="s/@PREFIX@/$prefix/g"

cat Makefile.in | $prg1 "$param1" | $prg2 "$param2" | sed "$sed" > Makefile

# create a simple <config.h>
echo "$0: creating config.h"
login=`whoami`
date=`date`
echo >> config.h
echo '/* edited by configure */' >> config.h
echo "#define COMPILATION_DATE \"compiled by $login at $date on $os\"" >> config.h
echo >> config.h

echo "--- Please make sure you have the following"
echo "--- libraries installed:"
echo "       [*] libmodplug >= 0.8"
echo "           freely available on <http://modplug-xmms.sourceforge.net/>"
echo "       [*] libao"
echo "           freely available on <http://www.xiph.org/ao/>"
echo "       [*] libaiff >= 1.1"
echo "           freely available on <http://aifftools.sourceforge.net/libaiff/>"
exit 0