# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI="4"

inherit eutils flag-o-matic toolchain-funcs

# Official patchlevel
# See ftp://ftp.cwru.edu/pub/bash/bash-4.2-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
}

DESCRIPTION="The standard GNU Bourne again shell"
HOMEPAGE="http://tiswww.case.edu/php/chet/bash/bashtop.html"
SRC_URI="mirror://gnu/bash/${MY_P}.tar.gz $(patches)"

LICENSE="GPL-3"
SLOT="${MY_PV}"
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 m68k ~mips ppc ppc64 s390 sparc x86"
IUSE="afs mem-scramble +net nls +readline static"

LIB_DEPEND=">=sys-libs/ncurses-5.2-r2[static-libs(+)]
	nls? ( virtual/libintl )
	readline? ( >=sys-libs/readline-6.2[static-libs(+)] )"
RDEPEND="!static? ( ${LIB_DEPEND//\[static-libs(+)]} )"
# we only need yacc when the .y files get patched (bash42-005)
DEPEND="${RDEPEND}
	virtual/yacc
	static? ( ${LIB_DEPEND} )"

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
}

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
	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

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

	epatch "${FILESDIR}"/${PN}-4.2-execute-job-control.patch #383237
	epatch "${FILESDIR}"/${PN}-4.2-parallel-build.patch
	epatch "${FILESDIR}"/${PN}-4.2-no-readline.patch
	epatch "${FILESDIR}"/${PN}-4.2-read-retry.patch #447810
	epatch "${FILESDIR}"/${PN}-4.2-speed-up-read-N.patch

	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=\'\"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\"\' \
		-DSTANDARD_UTILS_PATH=\'\"/bin:/usr/bin:/sbin:/usr/sbin\"\' \
		-DSYS_BASHRC=\'\"/etc/bash/bashrc\"\' \
		-DSYS_BASH_LOGOUT=\'\"/etc/bash/bash_logout\"\' \
		-DNON_INTERACTIVE_LOGIN_SHELLS \
		-DSSH_SOURCE_BASHRC \
		-DUSE_MKTEMP -DUSE_MKSTEMP

	use static && append-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=6.2

	# 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 :(.

	tc-export AR #444070
	econf \
		--with-installed-readline=. \
		--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_install() {
	into /
	newbin bash bash-${SLOT}

	newman doc/bash.1 bash-${SLOT}.1
	newman doc/builtins.1 builtins-${SLOT}.1

	insinto /usr/share/info
	newins doc/bashref.info bash-${SLOT}.info
	dosym bash-${SLOT}.info /usr/share/info/bashref-${SLOT}.info

	dodoc README NEWS AUTHORS CHANGES COMPAT Y2K doc/FAQ doc/INTRO
}