#!/bin/sh

# Turn on debug output if required
if [ "z$TT_DEBUG" = "ztrue" ]
then
	set -x
fi

usage()
{
	echo "Usage: `basename $0` [args] where args are as follows:"
	echo "   * --bootstrap"
	echo "     Indicates that we are bootstrapping (initial install)"
	echo "   * --bootstrap-user=<BOOTSTRAP_USER>"
	echo "     Sets the used to compile bootstrap code."
	echo "     Default: ttPM-boot"
	echo "     Hint: When building from CD based distros, set this to root."
	echo "   * --lfs-mount=<LFS_MOUNT>"
	echo "     During bootstrap, sets the location where LFS is mounted"
	echo "   * --prefix=<PREFIX>"
	echo "     Sets installation prefix."
	echo "     In bootstrap mode, sets the bootstrap prefix."
	echo "     Default: /usr (normal mode). /ttPM-bootstrap in bootstrap mode."
	echo "     Binaries are installed in PREFIX/bin."
	echo "     Superuser binaries are installed in PREFIX/sbin."
	echo "     Internal executables are installed in PREFIX/lib/ttPM"
	echo "     Configuration files are installed in PREFIX/etc/ttPM"
	echo "       (Can be overridden by --etc-dir argument)"
	echo "   * --etc-dir=<ETC_DIR>"
	echo "     Sets configuration directory."
	echo "     Default: PREFIX/etc/ttPM. /etc/ttPM if PREFIX=/usr."
	echo "   * --home-dir=<HOME_DIR>"
	echo "     Sets parent for home directory for packages."
	echo "     Default: /home/ttPM."
	echo "   * --var-dir=<VAR_DIR>"
	echo "     Sets var directory for pkgs."
	echo "     Default: /var/lib/ttPM."
	echo "   * --pkg-user=<PKG_USER>"
	echo "     Sets user & group name for package user."
	echo "     Default: pkg."
	echo "   * --min-id=<MIN_ID>"
	echo "     Sets the Minimum UID/GID for package users."
	echo "     Default: 1000."
	echo "   * --max-id=<MAX_ID>"
	echo "     Sets the Maximum UID/GID for package users."
	echo "     Default: 9999."
	echo "   * --sys-bit=<SYS_BIT>"
	echo "     Specifies whether the system is 32 or 64 bit"
	echo "     Default: 32"
	echo "   * --uniq-id=<UNIQ_ID>"
	echo "     Sets the id to be used for the current lfs installation."
	echo "     Useful for someone supporting multiple installations."
	echo "     Default: None, this has to be specified"
}

# Default values used
PREFIX="/usr"
PREFIX_BIN="/usr/bin"
PREFIX_ETC="/etc/ttPM"
PREFIX_LIB="/usr/lib/ttPM"
PREFIX_SBIN="/usr/sbin"

TT_BOOTSTRAP_MODE="no"
TT_BOOTSTRAP_PREFIX="/ttPM-bootstrap"
TT_BOOTSTRAP_USER="ttPM-boot"
TT_LFS_MOUNT="/lfs"

TT_ETC_DIR="/etc/ttPM"
TT_HOME_DIR="/home/ttPM"
TT_LIB_DIR="/usr/lib/ttPM"
TT_MIN_ID="1000"
TT_MAX_ID="9999"
TT_PKG_USER="pkg"
TT_SYS_BIT="32"
TT_VAR_DIR="/var/lib/ttPM"
TT_UNIQ_ID=""

# Vars useful to find what arguments are passed by the user
TT_PREFIX_SET="no"
TT_PREFIX_ETC_SET="no"

# Parse arguments and change vars if neccessary
for ARG
do
	VAL=`expr "x$ARG" : 'x[^=]*=\(.*\)'`
	case $ARG in
	--bootstrap)
		TT_BOOTSTRAP_MODE="yes"
		;;
	--bootstrap-user=*)
		TT_BOOTSTRAP_USER="$VAL"
		;;
	--lfs-mount=*)
		TT_LFS_MOUNT="$VAL"
		;;
	--prefix=*)
		PREFIX=$VAL
		TT_PREFIX_SET="yes"
		if [ "x$PREFIX" != "x/usr" ]
		then
			PREFIX_BIN="$PREFIX/bin"
			PREFIX_LIB="$PREFIX/lib/ttPM"
			PREFIX_SBIN="$PREFIX/sbin"
		fi
		;;
	--etc-dir=*)
		TT_ETC_DIR=$VAL
		TT_PREFIX_ETC_SET="yes"
		;;
	--home-dir=*)
		TT_HOME_DIR=$VAL
		;;
	--var-dir=*)
		TT_VAR_DIR=$VAL
		;;
	--pkg-user=*)
		TT_PKG_USER=$VAL
		;;
	--min-id=*)
		TT_MIN_ID=$VAL
		;;
	--max-id=*)
		TT_MAX_ID=$VAL
		;;
	--sys-bit=*)
		TT_SYS_BIT=$VAL
		if [ "$TT_SYS_BIT" != "32" ] && [ "$TT_SYS_BIT" != "64" ]
		then
			echo "Valid values for --sys-bit are 32 and 64"
			echo "Using default of 32"
			TT_SYS_BIT="32"
		fi
		;;
	--uniq-id=*)
		TT_UNIQ_ID=$VAL
		;;
	--help)
		usage
		exit 0
		;;
	esac
done
if [ "x$TT_BOOTSTRAP_MODE" = "xyes" ]
then
	if [ "x$TT_PREFIX_SET" = "xyes" ]
	then
		TT_BOOTSTRAP_PREFIX=$PREFIX
	else
		PREFIX=$TT_BOOTSTRAP_PREFIX
		TT_PREFIX_SET="yes"
		PREFIX_BIN="$PREFIX/bin"
		PREFIX_LIB="$PREFIX/lib/ttPM"
		PREFIX_SBIN="$PREFIX/sbin"
	fi
fi
if [ "x$TT_PREFIX_ETC_SET" = "xno" ] && [ "x$PREFIX" != "x/usr" ]
then
	PREFIX_ETC="$PREFIX/etc/ttPM"
fi

# Check if TT_UNIQ_ID is set
if [ "z$TT_UNIQ_ID" = "z" ]
then
	echo "Error: Unique ID for installation is not specified"
	echo "Use the following command to obtain help"
	echo "   ./`basename $0` --help"
	exit 1
fi

# Sed the variables set above into all .in files to create the final versions.
for F in `find etc/ scripts/ src/ -type f -name "*.in"` bootstrap0.in install-ttPM.in
do
	FF=`basename $F .in`
	DD=`dirname $F`
	sed \
	-e "s:@PREFIX_BIN@:$PREFIX_BIN:g" \
	-e "s:@PREFIX_ETC@:$PREFIX_ETC:g" \
	-e "s:@PREFIX_LIB@:$PREFIX_LIB:g"\
	-e "s:@PREFIX_SBIN@:$PREFIX_SBIN:g" \
	-e "s:@TT_BOOTSTRAP_MODE@:$TT_BOOTSTRAP_MODE:g" \
	-e "s:@TT_BOOTSTRAP_PREFIX@:$TT_BOOTSTRAP_PREFIX:g" \
	-e "s:@TT_BOOTSTRAP_USER@:$TT_BOOTSTRAP_USER:g" \
	-e "s:@TT_LFS_MOUNT@:$TT_LFS_MOUNT:g" \
	-e "s:@TT_ETC_DIR@:$TT_ETC_DIR:g" \
	-e "s:@TT_HOME_DIR@:$TT_HOME_DIR:g" \
	-e "s:@TT_LIB_DIR@:$TT_LIB_DIR:g" \
	-e "s:@TT_MAX_ID@:$TT_MAX_ID:g" \
	-e "s:@TT_MIN_ID@:$TT_MIN_ID:g" \
	-e "s:@TT_PKG_USER@:$TT_PKG_USER:g" \
	-e "s:@TT_SYS_BIT@:$TT_SYS_BIT:g" \
	-e "s:@TT_VAR_DIR@:$TT_VAR_DIR:g" \
	-e "s:@TT_UNIQ_ID@:$TT_UNIQ_ID:g" \
	$F > $DD/$FF || exit 1
done

# For a regular build, compile Depend.java if gcj is available
if [ "$TT_BOOTSTRAP_MODE" = "no" ]
then
	GCJ=`which gcj 2>/dev/null`
	if [ "x$GCJ" = "x" ]
	then
		echo "gcj not found on the system..."
		echo "gcc should be compiled with java language support..."
		exit 1
	else
		$GCJ $CFLAGS --main=Depend -DTT_VAR_DIR="$TT_VAR_DIR" -DTT_ETC_DIR="$TT_ETC_DIR" -o src/getPkgLinkOrder src/Depend.java || exit 1
	fi
fi

chmod +x bootstrap0 || exit 1
chmod +x install-ttPM || exit 1

# Output variables for the user
echo "The following variables are used by ttPM scripts:"
echo "   * PREFIX_BIN=$PREFIX_BIN"
echo "   * PREFIX_ETC=$PREFIX_ETC"
echo "   * PREFIX_LIB=$PREFIX_LIB"
echo "   * PREFIX_SBIN=$PREFIX_SBIN"
echo "   * TT_BOOTSTRAP_MODE=$TT_BOOTSTRAP_MODE"
echo "   * TT_BOOTSTRAP_PREFIX=$TT_BOOTSTRAP_PREFIX"
echo "   * TT_BOOTSTRAP_USER=$TT_BOOTSTRAP_USER"
echo "   * TT_LFS_MOUNT=$TT_LFS_MOUNT"
echo "   * TT_ETC_DIR=$TT_ETC_DIR"
echo "   * TT_HOME_DIR=$TT_HOME_DIR"
echo "   * TT_LIB_DIR=$TT_LIB_DIR"
echo "   * TT_MAX_ID=$TT_MAX_ID"
echo "   * TT_MIN_ID=$TT_MIN_ID"
echo "   * TT_PKG_USER=$TT_PKG_USER"
echo "   * TT_SYS_BIT=$TT_SYS_BIT"
echo "   * TT_VAR_DIR=$TT_VAR_DIR"
echo "   * T_UNIQ_ID=$TT_UNIQ_ID"
echo "If any of these values are not correct, rerun this script"