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# Copyright 1999-2018 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI="4"

inherit eutils toolchain-funcs

DESCRIPTION="Text formatter used for man pages"
HOMEPAGE="https://www.gnu.org/software/groff/groff.html"
SRC_URI="mirror://gnu/groff/${P}.tar.gz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~alpha amd64 arm ~arm64 hppa ia64 ~m68k ~mips ppc ~ppc64 ~s390 ~sh sparc x86 ~ppc-aix ~x64-cygwin ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
IUSE="examples X"

RDEPEND="
	X? (
		x11-libs/libX11
		x11-libs/libXt
		x11-libs/libXmu
		x11-libs/libXaw
		x11-libs/libSM
		x11-libs/libICE
	)"
DEPEND="${RDEPEND}
	dev-lang/perl"

DOCS=( BUG-REPORT ChangeLog MORE.STUFF NEWS PROBLEMS PROJECTS README REVISION TODO VERSION )

src_prepare() {
	epatch "${FILESDIR}"/${PN}-1.19.2-man-unicode-dashes.patch #16108 #17580 #121502
	epatch "${FILESDIR}"/${PN}-1.22.3-parallel-mom.patch #487276

	# Make sure we can cross-compile this puppy
	if tc-is-cross-compiler ; then
		sed -i \
			-e '/^GROFFBIN=/s:=.*:=${EPREFIX}/usr/bin/groff:' \
			-e '/^TROFFBIN=/s:=.*:=${EPREFIX}/usr/bin/troff:' \
			-e '/^GROFF_BIN_PATH=/s:=.*:=:' \
			-e '/^GROFF_BIN_DIR=/s:=.*:=:' \
			contrib/*/Makefile.sub \
			doc/Makefile.in \
			doc/Makefile.sub || die "cross-compile sed failed"
	fi

	local pfx=$(usex prefix ' Prefix' '')
	cat <<-EOF >> tmac/mdoc.local
	.ds volume-operating-system Gentoo${pfx}
	.ds operating-system Gentoo${pfx}/${KERNEL}
	.ds default-operating-system Gentoo${pfx}/${KERNEL}
	EOF

	# make sure we don't get a crappy `g' nameprefix on UNIX systems with real
	# troff (GROFF_G macro runs some test to see, its own troff doesn't satisfy)
	sed -i -e 's/^[ \t]\+g=g$/g=/' configure || die
}

src_configure() {
	econf \
		--with-appresdir="${EPREFIX}"/usr/share/X11/app-defaults \
		--docdir="${EPREFIX}"/usr/share/doc/${PF} \
		$(use_with X x)
}

src_compile() {
	emake AR="$(tc-getAR)"
}

src_install() {
	default

	# The following links are required for man #123674
	dosym eqn /usr/bin/geqn
	dosym tbl /usr/bin/gtbl

	if ! use examples ; then
		# The pdf files might not be generated if ghostscript is unavailable. #602020
		local pdf="${ED}/usr/share/doc/${PF}/examples/mom/mom-pdf.pdf"
		if [[ -e ${pdf} ]] ; then
			# Keep mom-pdf.pdf since it's more of a manual than an example. #454196 #516732
			mv "${pdf}" "${ED}"/usr/share/doc/${PF}/pdf/ || die
		fi
		rm -rf "${ED}"/usr/share/doc/${PF}/examples
	fi
}