# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

inherit eutils linux-info

ATOP_INIT_VERSION="1.9"
ATOP_INIT_SCRIPT=${PN}-${ATOP_INIT_VERSION}-initscript

DESCRIPTION="Resource-specific view of processes"
SRC_URI="ftp://ftp.atcomputing.nl/pub/tools/linux/${P}.tar.gz
		mirror://gentoo/${PN}-${ATOP_INIT_VERSION}-initscript
		kernel_patch? (http://www.atconsultancy.nl/atop/packages/${PN}patch-${PV}.tar.gz)"
HOMEPAGE="http://www.atconsultancy.nl/atop/"
LICENSE="GPL-2"
SLOT="0"
DEPEND="sys-apps/acct"
KEYWORDS="~x86 ~amd64"
IUSE="kernel_patch"

# pkg_preinst aviods sandboxing issues for kernel patches
pkg_preinst() {
	use kernel_patch && {
		if kernel_is 2 6 8
		then
			cp ${WORKDIR}/${PN}patch-${PV}/01patch-2.6.8_atopcnt /usr/src/
			cp ${WORKDIR}/${PN}patch-${PV}/02patch-2.6.8_atopacct /usr/src/
			cd /usr/src
			patch -p0 < 01patch-2.6.8_atopcnt || die "kernel patching failed."
			patch -p0 < 02patch-2.6.8_atopacct || die "kernel patching failed"
			rm -f /usr/src/02patch-2.6.8_atopacct /usr/src/01patch-2.6.8_atopcnt
		else
			die "Your kernel must be 2.6.8 for USE=\"kernel_patch\" to work"
		fi
	}
}

src_unpack() {
	unpack ${A} || die "unpack failed"
	cd ${S}
	mv ${S}/atop.init ${S}/atop.init.old
	cp ${DISTDIR}/${ATOP_INIT_SCRIPT} ${S}/atop.init
}

src_compile() {
	cd ${S}
	emake || die "emake failed"
}

src_install() {
	make DESTDIR=${D} INIPATH=/etc/init.d install || die "make install failed"
	dodoc README
}


pkg_postinst() {
	echo ""
	use kernel_patch || {
		einfo "Version >= 1.14 of this package include"
		einfo "optional patches to the kernel to increase"
		einfo "functionality of the program. To enable"
		einfo "them, please recompile this package with"
		einfo "USE=\"kernel_patch\", and ensure that"
		einfo "/usr/src/linux points to your kernel. It"
		einfo "will then be necessary to recompile your kernel."
	}
	use kernel_patch && {
		einfo "You have chosen to install this package and its"
		einfo "kernel patches. /usr/src/linux has been patched."
		echo ""
		ewarn "You will, of course, need to recompile your"
		ewarn "kernel for the patches to become useful."
	}
	echo ""
	ewarn "Please be aware that these patches are made for"
	ewarn "linux-2.6.8 (non-vanilla SEEMS to work as well,"
	ewarn "so don't worry if you have gentoo-dev-sources-2.6.8"
	ewarn "or something along those lines). They are not known"
	ewarn "to work on versions other than 2.6.8. Hopefully"
	ewarn "developers upstream will fix this soon!"
	echo ""
}