# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

inherit eutils

DESCRIPTION="Truecrypt is a windows/linux based open & free software encryption tool. Supporting MANY encryption algorithms and hash-cyphers. Use it! But on your own risk :-)"
HOMEPAGE="http://truecrypt.org/"
SRC_URI="http://www.truecrypt.org/downloads/${P}-source-code.tar.gz"
LICENSE="truecrypt"
SLOT="0"
KEYWORDS="~x86"
IUSE=""

DEPEND=">=sys-fs/device-mapper-1.00.08
	>=virtual/linux-sources-2.6.5" 

# S=Source-Verzeichnis src_compile geht in das $S Verzeichnis 
# WORKDIR: /tmp/portage/paketname/work
# durch entpacken mit tar --> er geht davon aus, dass das Verzeichnis was durch das entpacken entsteht $P ($P=paketname - versionsname)
S=${WORKDIR}/${P}/Linux

src_compile() {

	##########################
	# change build.sh:
	##########################
	# stop if NO /usr/src/linux/.config was found 
	sed -i -e 's#if \[ -f /proc/config.gz -o -f /boot/config-$(uname -r) \]#if [ 0 == 1 ];#' build.sh
	# stop if the kernel-source path does not exist
	sed -i -e 's#\(if \[ ! -d "$KERNEL_SRC".*\)#\1; then ( eerror "No kernel source under \"$KERNEL_SRC\"found !" ; die ) fi ; if [ 0 == 1 ]#' build.sh
	# do not do the root-right-check
	sed -i -e 's#^.*Administrator (root) privileges required for kernel source configuration..*##' build.sh

	{ unset ARCH; /bin/sh build.sh; } || die
}

pkg_preinst() {
	if ! dmsetup targets >/dev/null; then
		eerror "TrueCrypt requires device mapper tools (dmsetup) 1.00.08 or later.";
		eerror "Check also your kernel-config.";
		eerror "Come back when 'dmsetup targets' returns no errors anymore.";
		die;
	fi;
}

src_install() {

	#########################
	# error checking so that the install.sh does NOT stop and ask:
	#########################
	error_occured=0;
	if [ ! -c /dev/mapper/control -a ! -L /dev/mapper/control ]; then
		eerror "/dev/mapper/control not found - please create it first."
		error_occured=1;
	fi;
	if [ ! -b /dev/loop0 -a ! -b /dev/loop/0 -a ! -b /dev/loop1 ]; then
		eerror "No loopback device /dev/loop found - please create it first."
		error_occured=1;
	fi;
	if [ $error_occured == 1 ]; then
		die
	fi;

	##########################
	# change install.sh:
	##########################
	# do NOT stop with "read"
	sed -i -e 's#read A#A="WE DO NOT WANT TO INTERRUPT HERE"#g' install.sh
	# do NOT reset *_DIR variables
	sed -i -e 's#\[ "$A" \] && [A-Z_]\+=$A##g' install.sh
	# change /usr/local to /usr
	sed -i -e 's#/usr/local/#/usr/#g' install.sh
	# change paths
	sed -i -e 's#^\(..._DIR=/\)\(.*\)#\1${D}\2#g' install.sh
	# change mkdir to mkdir -p
    sed -i -e 's#mkdir "$MOD_DIR"#mkdir -p "$MOD_DIR"#g' install.sh
	# omit "dmsetup"-check (because it was done in preinst)
	sed -i -e 's#if ! dmsetup targets >&-#if [ 1 == 0 ];#g' install.sh
	# delay depmod -a for postinst
	sed -i -e 's# && depmod -a$##g' install.sh

	# so that install.sh finds them (for test and cp)
	dodir "/usr/bin"
	dodir "/usr/man/man1"

	( /bin/sh install.sh ) || die

	dodoc "../License.txt"
	dodoc "../Readme.txt"
}

pkg_postinst() {
    depmod -a || eerror "depmod -a FAILED"
}