# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-apps/busybox/busybox-1.20.1.ebuild,v 1.9 2012/07/18 11:29:35 vapier Exp $

EAPI="4"
inherit eutils flag-o-matic savedconfig toolchain-funcs multilib

################################################################################
# BUSYBOX ALTERNATE CONFIG MINI-HOWTO
#
# Busybox can be modified in many different ways. Here's a few ways to do it:
#
# (1) Emerge busybox with FEATURES=keepwork so the work directory won't
#     get erased afterwards. Add a definition like ROOT=/my/root/path to the
#     start of the line if you're installing to somewhere else than the root
#     directory. This command will save the default configuration to
#     ${PORTAGE_CONFIGROOT} (or ${ROOT} if ${PORTAGE_CONFIGROOT} is not
#     defined), and it will tell you that it has done this. Note the location
#     where the config file was saved.
#
#     FEATURES=keepwork USE=savedconfig emerge busybox
#
# (2) Go to the work directory and change the configuration of busybox using its
#     menuconfig feature.
#
#     cd /var/tmp/portage/busybox*/work/busybox-*
#     make menuconfig
#
# (3) Save your configuration to the default location and copy it to the
#     one of the locations listed in /usr/portage/eclass/savedconfig.eclass
#
# (4) Emerge busybox with USE=savedconfig to use the configuration file you
#     just generated.
#
################################################################################
#
# (1) Alternatively skip the above steps and simply emerge busybox without
#     USE=savedconfig.
#
# (2) Edit the file it saves by hand. ${ROOT}"/etc/portage/savedconfig/${CATEGORY}/${PF}
#
# (3) Remerge busybox as using USE=savedconfig.
#
################################################################################

DESCRIPTION="Utilities for rescue and embedded systems"
HOMEPAGE="http://www.busybox.net/"
if [[ ${PV} == "9999" ]] ; then
	MY_P=${PN}
	EGIT_REPO_URI="git://busybox.net/busybox.git"
	inherit git-2
else
	MY_P=${PN}-${PV/_/-}
	SRC_URI="http://www.busybox.net/downloads/${MY_P}.tar.bz2"
	KEYWORDS="alpha amd64 arm hppa ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~amd64-linux ~x86-linux"
fi

LICENSE="GPL-2"
SLOT="0"
IUSE="ipv6 livecd make-symlinks math mdev -pam selinux sep-usr static"
RESTRICT="test"

RDEPEND="selinux? ( sys-libs/libselinux )
	pam? ( sys-libs/pam )"
DEPEND="${RDEPEND}
	>=sys-kernel/linux-headers-2.6.39"

S=${WORKDIR}/${MY_P}

busybox_config_option() {
	case $1 in
		y) sed -i -e "s:.*\<CONFIG_$2\>.*set:CONFIG_$2=y:g" .config;;
		n) sed -i -e "s:CONFIG_$2=y:# CONFIG_$2 is not set:g" .config;;
		*) use $1 \
		       && busybox_config_option y $2 \
		       || busybox_config_option n $2
		   return 0
		   ;;
	esac
	einfo $(grep "CONFIG_$2[= ]" .config || echo Could not find CONFIG_$2 ...)
}

src_prepare() {
	unset KBUILD_OUTPUT #88088
	append-flags -fno-strict-aliasing #310413
	use ppc64 && append-flags -mminimal-toc #130943

	# patches go here!
	epatch "${FILESDIR}"/${PN}-1.19.0-bb.patch
	epatch "${FILESDIR}"/${PN}-1.20.0-udhcpc6-ipv6.patch
	#epatch "${FILESDIR}"/${P}-*.patch
	cp "${FILESDIR}"/ginit.c init/ || die

	# flag cleanup
	sed -i -r \
		-e 's:[[:space:]]?-(Werror|Os|falign-(functions|jumps|loops|labels)=1|fomit-frame-pointer)\>::g' \
		Makefile.flags || die
	#sed -i '/bbsh/s:^//::' include/applets.h
	sed -i '/^#error Aborting compilation./d' applets/applets.c || die
	use elibc_glibc && sed -i 's:-Wl,--gc-sections::' Makefile
	sed -i \
		-e "/^CROSS_COMPILE/s:=.*:= ${CHOST}-:" \
		-e "/^AR\>/s:=.*:= $(tc-getAR):" \
		-e "/^CC\>/s:=.*:= $(tc-getCC):" \
		-e "/^HOSTCC/s:=.*:= $(tc-getBUILD_CC):" \
		Makefile || die
	sed -i \
		-e 's:-static-libgcc::' \
		Makefile.flags || die
}

src_configure() {
	# check for a busybox config before making one of our own.
	# if one exist lets return and use it.

	restore_config .config
	if [ -f .config ]; then
		yes "" | emake -j1 oldconfig > /dev/null
		return 0
	else
		ewarn "Could not locate user configfile, so we will save a default one"
	fi

	# setup the config file
	emake -j1 allyesconfig > /dev/null
	# nommu forces a bunch of things off which we want on #387555
	busybox_config_option n NOMMU
	sed -i '/^#/d' .config
	yes "" | emake -j1 oldconfig >/dev/null

	# now turn off stuff we really don't want
	busybox_config_option n DMALLOC
	busybox_config_option n FEATURE_SUID_CONFIG
	busybox_config_option n BUILD_AT_ONCE
	busybox_config_option n BUILD_LIBBUSYBOX
	busybox_config_option n MONOTONIC_SYSCALL
	busybox_config_option n WERROR

	# If these are not set and we are using a uclibc/busybox setup
	# all calls to system() will fail.
	busybox_config_option y ASH
	busybox_config_option n HUSH

	# disable ipv6 applets
	if ! use ipv6; then
		busybox_config_option n FEATURE_IPV6
		busybox_config_option n TRACEROUTE6
		busybox_config_option n PING6
	fi

	if use static && use pam ; then
		ewarn "You cannot have USE='static pam'.  Assuming static is more important."
	fi
	use static \
		&& busybox_config_option n PAM \
		|| busybox_config_option pam PAM
	busybox_config_option static STATIC
	busybox_config_option math FEATURE_AWK_LIBM

	# all the debug options are compiler related, so punt them
	busybox_config_option n DEBUG
	busybox_config_option y NO_DEBUG_LIB
	busybox_config_option n DMALLOC
	busybox_config_option n EFENCE

	busybox_config_option selinux SELINUX

	# this opt only controls mounting with <linux-2.6.23
	busybox_config_option n FEATURE_MOUNT_NFS

	# default a bunch of uncommon options to off
	local opt
	for opt in \
		ADD_SHELL \
		BEEP BOOTCHARTD \
		CRONTAB \
		DC DEVFSD DNSD DPKG{,_DEB} \
		FAKEIDENTD FBSPLASH FOLD FSCK_MINIX FTP{GET,PUT} \
		FEATURE_DEVFS \
		HOSTID HUSH \
		INETD INOTIFYD IPCALC \
		LOCALE_SUPPORT LOGNAME LPD \
		MAKEMIME MKFS_MINIX MSH \
		OD \
		RDEV READPROFILE REFORMIME REMOVE_SHELL RFKILL RUN_PARTS RUNSV{,DIR} \
		SLATTACH SMEMCAP SULOGIN SV{,LOGD} \
		TASKSET TCPSVD \
		RPM RPM2CPIO \
		UDPSVD UUDECODE UUENCODE
	do
		busybox_config_option n ${opt}
	done

	emake -j1 oldconfig > /dev/null
}

src_compile() {
	unset KBUILD_OUTPUT #88088
	export SKIP_STRIP=y

	emake V=1 busybox
	if ! use static ; then
		cp .config{,.bak}
		mv busybox_unstripped{,.bak}
		use pam && busybox_config_option n PAM
		emake CONFIG_STATIC=y busybox
		mv busybox_unstripped bb
		mv busybox_unstripped{.bak,}
		mv .config{.bak,}
	else
		# keeps src_install simpler
		ln busybox_unstripped bb
	fi
}

src_install() {
	unset KBUILD_OUTPUT #88088
	save_config .config

	into /
	dodir /bin
	if use sep-usr ; then
		# install /ginit to take care of mounting stuff
		exeinto /
		newexe bb ginit
		dosym /ginit /bin/bb
		if use static ; then
			dosym bb /bin/busybox
		else
			newbin busybox_unstripped busybox
		fi
	else
		newbin busybox_unstripped busybox
		if use static ; then
			dosym busybox /bin/bb
		else
			dobin bb
		fi
	fi
	if use mdev ; then
		dodir /$(get_libdir)/mdev/
		use make-symlinks || dosym /bin/bb /sbin/mdev
		cp "${S}"/examples/mdev_fat.conf "${ED}"/etc/mdev.conf

		exeinto /$(get_libdir)/mdev/
		doexe "${FILESDIR}"/mdev/*

		newinitd "${FILESDIR}"/mdev.rc.1 mdev
	fi
	if use livecd ; then
		dosym busybox /bin/vi
	fi

	# bundle up the symlink files for use later
	emake DESTDIR="${ED}" install
	rm _install/bin/busybox
	tar cf busybox-links.tar -C _install . || : #;die
	insinto /usr/share/${PN}
	use make-symlinks && doins busybox-links.tar

	dodoc AUTHORS README TODO

	cd docs
	docinto txt
	dodoc *.txt
	docinto pod
	dodoc *.pod
	dohtml *.html

	cd ../examples
	docinto examples
	dodoc inittab depmod.pl *.conf *.script undeb unrpm
}

pkg_preinst() {
	if use make-symlinks && [[ ! ${VERY_BRAVE_OR_VERY_DUMB} == "yes" ]] && [[ ${ROOT} == "/" ]] ; then
		ewarn "setting USE=make-symlinks and emerging to / is very dangerous."
		ewarn "it WILL overwrite lots of system programs like: ls bash awk grep (bug 60805 for full list)."
		ewarn "If you are creating a binary only and not merging this is probably ok."
		ewarn "set env VERY_BRAVE_OR_VERY_DUMB=yes if this is really what you want."
		die "silly options will destroy your system"
	fi

	if use make-symlinks ; then
		mv "${ED}"/usr/share/${PN}/busybox-links.tar "${T}"/ || die
	fi
}

pkg_postinst() {
	savedconfig_pkg_postinst

	if use make-symlinks ; then
		cd "${T}" || die
		mkdir _install
		tar xf busybox-links.tar -C _install || die
		cp -vpPR _install/* "${ROOT}"/ || die "copying links for ${x} failed"
	fi

	if use sep-usr ; then
		elog "In order to use the sep-usr support, you have to update your"
		elog "kernel command line.  Add the option:"
		elog "     init=/ginit"
		elog "To launch a different init than /sbin/init, use:"
		elog "     init=/ginit /sbin/yourinit"
		elog "To get a rescue shell, you may boot with:"
		elog "     init=/ginit bb"
	fi
}