# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

EAPI="5"

inherit eutils flag-o-matic toolchain-funcs multilib

# Official patchlevel
# See ftp://ftp.cwru.edu/pub/bash/bash-4.3-patches/
PLEVEL=${PV##*_p}
MY_PV=${PV/_p*}
MY_PV=${MY_PV/_/-}
MY_P=${PN}-${MY_PV}
[[ ${PV} != *_p* ]] && PLEVEL=0
patches() {
	local opt=$1 plevel=${2:-${PLEVEL}} pn=${3:-${PN}} pv=${4:-${MY_PV}}
	[[ ${plevel} -eq 0 ]] && return 1
	eval set -- {1..${plevel}}
	set -- $(printf "${pn}${pv/\.}-%03d " "$@")
	if [[ ${opt} == -s ]] ; then
		echo "${@/#/${DISTDIR}/}"
	else
		local u
		for u in ftp://ftp.cwru.edu/pub/bash mirror://gnu/${pn} ; do
			printf "${u}/${pn}-${pv}-patches/%s " "$@"
		done
	fi
}

# The version of readline this bash normally ships with.
READLINE_VER="7.0_rc2"

IS_A_RELEASE=false
[[ ${PV} != *_alpha* && ${PV} != *_beta* && ${PV} != *_rc* ]] && IS_A_RELEASE=true

DESCRIPTION="The standard GNU Bourne again shell"
HOMEPAGE="http://tiswww.case.edu/php/chet/bash/bashtop.html"

if [[ ${IS_A_RELEASE} == true ]]; then
	SRC_URI="mirror://gnu/bash/${MY_P}.tar.gz $(patches)"
else
	SRC_URI+=" ftp://ftp.cwru.edu/pub/bash/${MY_P}.tar.gz"
fi

LICENSE="GPL-3"
SLOT="0"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~sparc-fbsd ~x86-fbsd"
IUSE="afs bashlogger examples mem-scramble +net nls plugins +readline tinfo vanilla"
[[ ${IS_A_RELEASE} == true ]] && IUSE+=' +installed-readline'

DEPEND=">=sys-libs/ncurses-5.2-r2:0=
	tinfo? ( sys-libs/ncurses:0=[tinfo] )
	!tinfo? ( !sys-libs/ncurses:0=[tinfo] )
	nls? ( virtual/libintl )"
[[ ${IS_A_RELEASE} == true ]] && DEPEND+=" readline? ( installed-readline? ( >=sys-libs/readline-${READLINE_VER}:0= ) )"
RDEPEND="${DEPEND}
	!<sys-apps/portage-2.1.6.7_p1
	!<sys-apps/paludis-0.26.0_alpha5"
# we only need yacc when the .y files get patched (bash42-005)
DEPEND+=" virtual/yacc"

S=${WORKDIR}/${MY_P}

pkg_setup() {
	if is-flag -malign-double ; then #7332
		eerror "Detected bad CFLAGS '-malign-double'.  Do not use this"
		eerror "as it breaks LFS (struct stat64) on x86."
		die "remove -malign-double from your CFLAGS mr ricer"
	fi
	if use bashlogger ; then
		ewarn "The logging patch should ONLY be used in restricted (i.e. honeypot) envs."
		ewarn "This will log ALL output you enter into the shell, you have been warned."
	fi
	use tinfo && export LDFLAGS="-ltinfo ${LDFLAGS}" LIBS="-ltinfo ${LIBS}"
}

src_unpack() {
	unpack ${MY_P}.tar.gz
}

src_prepare() {
	# Include official patches
	[[ ${PLEVEL} -gt 0 ]] && epatch $(patches -s)

	# Clean out local libs so we know we use system ones w/releases.
	if [[ ${IS_A_RELEASE} == true ]] && use installed-readline; then
		rm -rf lib/{readline,termcap}/*
		touch lib/{readline,termcap}/Makefile.in # for config.status
		sed -ri -e 's:\$[(](RL|HIST)_LIBSRC[)]/[[:alpha:]]*.h::g' Makefile.in || die
	fi

	# Avoid regenerating docs after patches #407985
	sed -i -r '/^(HS|RL)USER/s:=.*:=:' doc/Makefile.in || die
	touch -r . doc/*

	epatch_user
}

src_configure() {
	local myconf=()

	# For descriptions of these, see config-top.h
	# bashrc/#26952 bash_logout/#90488 ssh/#24762 mktemp/#574426
	append-cppflags \
		-DDEFAULT_PATH_VALUE=\'\"${EPREFIX}/usr/local/sbin:${EPREFIX}/usr/local/bin:${EPREFIX}/usr/sbin:${EPREFIX}/usr/bin:${EPREFIX}/sbin:${EPREFIX}/bin\"\' \
		-DSTANDARD_UTILS_PATH=\'\"${EPREFIX}/bin:${EPREFIX}/usr/bin:${EPREFIX}/sbin:${EPREFIX}/usr/sbin\"\' \
		-DSYS_BASHRC=\'\"${EPREFIX}/etc/bash/bashrc\"\' \
		-DSYS_BASH_LOGOUT=\'\"${EPREFIX}/etc/bash/bash_logout\"\' \
		-DNON_INTERACTIVE_LOGIN_SHELLS \
		-DSSH_SOURCE_BASHRC \
		$(use bashlogger && echo -DSYSLOG_HISTORY)

	# Don't even think about building this statically without
	# reading Bug 7714 first.  If you still build it statically,
	# don't come crying to us with bugs ;).
	#use static && export LDFLAGS="${LDFLAGS} -static"
	use nls || myconf+=( --disable-nls )

	# Historically, we always used the builtin readline, but since
	# our handling of SONAME upgrades has gotten much more stable
	# in the PM (and the readline ebuild itself preserves the old
	# libs during upgrades), linking against the system copy should
	# be safe.
	# Exact cached version here doesn't really matter as long as it
	# is at least what's in the DEPEND up above.
	export ac_cv_rl_version=${READLINE_VER%%_*}

	# Force linking with system curses ... the bundled termcap lib
	# sucks bad compared to ncurses.  For the most part, ncurses
	# is here because readline needs it.  But bash itself calls
	# ncurses in one or two small places :(.

	if [[ ${IS_A_RELEASE} == true ]] && use installed-readline; then
		# Use system readline only with released versions.
		myconf+=( --with-installed-readline=. )
	fi

	if use plugins; then
		append-ldflags -Wl,-rpath,/usr/$(get_libdir)/bash
	else
		# Disable the plugins logic by hand since bash doesn't
		# provide a way of doing it.
		export ac_cv_func_dl{close,open,sym}=no \
			ac_cv_lib_dl_dlopen=no ac_cv_header_dlfcn_h=no
		sed -i \
			-e '/LOCAL_LDFLAGS=/s:-rdynamic::' \
			configure || die
	fi
	tc-export AR #444070
	econf \
		--docdir='$(datarootdir)'/doc/${PF} \
		--htmldir='$(docdir)/html' \
		--with-curses \
		$(use_with afs) \
		$(use_enable net net-redirections) \
		--disable-profiling \
		$(use_enable mem-scramble) \
		$(use_with mem-scramble bash-malloc) \
		$(use_enable readline) \
		$(use_enable readline history) \
		$(use_enable readline bang-history) \
		"${myconf[@]}"
}

src_compile() {
	emake

	if use plugins ; then
		emake -C examples/loadables all others
	fi
}

src_install() {
	local d f

	default

	dodir /bin
	mv "${ED}"/usr/bin/bash "${ED}"/bin/ || die
	dosym bash /bin/rbash

	insinto /etc/bash
	doins "${FILESDIR}"/bash_logout
	doins "${FILESDIR}"/bashrc
	keepdir /etc/bash/bashrc.d
	insinto /etc/skel
	for f in bash{_logout,_profile,rc} ; do
		newins "${FILESDIR}"/dot-${f} .${f}
	done

	local sed_args=(
		-e "s:#${USERLAND}#@::"
		-e '/#@/d'
	)
	if ! use readline ; then
		sed_args+=( #432338
			-e '/^shopt -s histappend/s:^:#:'
			-e 's:use_color=true:use_color=false:'
		)
	fi
	sed -i \
		"${sed_args[@]}" \
		"${ED}"/etc/skel/.bashrc \
		"${ED}"/etc/bash/bashrc || die

	if use plugins ; then
		exeinto /usr/$(get_libdir)/bash
		doexe $(echo examples/loadables/*.o | sed 's:\.o::g')
		insinto /usr/include/bash-plugins
		doins *.h builtins/*.h include/*.h lib/{glob/glob.h,tilde/tilde.h}
	fi

	if use examples ; then
		for d in examples/{functions,misc,scripts,startup-files} ; do
			exeinto /usr/share/doc/${PF}/${d}
			insinto /usr/share/doc/${PF}/${d}
			for f in ${d}/* ; do
				if [[ ${f##*/} != PERMISSION ]] && [[ ${f##*/} != *README ]] ; then
					doexe ${f}
				else
					doins ${f}
				fi
			done
		done
	fi

	doman doc/*.1
	newdoc CWRU/changelog ChangeLog
	dosym bash.info /usr/share/info/bashref.info
}

pkg_preinst() {
	if [[ -e ${EROOT}/etc/bashrc ]] && [[ ! -d ${EROOT}/etc/bash ]] ; then
		mkdir -p "${EROOT}"/etc/bash
		mv -f "${EROOT}"/etc/bashrc "${EROOT}"/etc/bash/
	fi

	if [[ -L ${EROOT}/bin/sh ]] ; then
		# rewrite the symlink to ensure that its mtime changes. having /bin/sh
		# missing even temporarily causes a fatal error with paludis.
		local target=$(readlink "${EROOT}"/bin/sh)
		local tmp=$(emktemp "${EROOT}"/bin)
		ln -sf "${target}" "${tmp}"
		mv -f "${tmp}" "${EROOT}"/bin/sh
	fi
}

pkg_postinst() {
	# If /bin/sh does not exist, provide it
	if [[ ! -e ${EROOT}/bin/sh ]] ; then
		ln -sf bash "${EROOT}"/bin/sh
	fi
}