# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

EAPI=3
WX_GTK_VER="2.8"

inherit elisp-common eutils java-pkg-opt-2 multilib versionator wxwidgets

# NOTE: If you need symlinks for binaries please tell maintainers or
# open up a bug to let it be created.

# erlang uses a really weird versioning scheme which caused quite a few problems
# already. Thus we do a slight modification converting all letters to digits to
# make it more sane (see e.g. #26420)

# the next line selects the right source.
ERL_VER=($(get_version_components))
MY_PV="R$(get_major_version)B0${ERL_VER[2]}"

# ATTN!! Take care when processing the C, etc version!
MY_P=otp_src_${MY_PV}

DESCRIPTION="Erlang programming language, runtime environment, and large collection of libraries"
HOMEPAGE="http://www.erlang.org/"
SRC_URI="http://www.erlang.org/download/${MY_P}-${ERL_VER[3]}.tar.gz
	http://erlang.org/download/otp_doc_man_${MY_PV}-${ERL_VER[3]}.tar.gz
	doc? ( http://erlang.org/download/otp_doc_html_${MY_PV}-${ERL_VER[3]}.tar.gz )"

LICENSE="ErlPL-1.1"
SLOT="0"
KEYWORDS="alpha amd64 ~arm ~ia64 ppc ppc64 sparc x86 ~x86-fbsd ~x86-freebsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~x64-solaris"
IUSE="compat-ethread doc emacs halfword hipe java kpoll odbc smp sctp ssl tk wxwidgets"

RDEPEND=">=dev-lang/perl-5.6.1
	ssl? ( >=dev-libs/openssl-0.9.7d )
	emacs? ( virtual/emacs )
	java? ( >=virtual/jdk-1.2 )
	odbc? ( dev-db/unixODBC )"
DEPEND="${RDEPEND}
	wxwidgets? ( x11-libs/wxGTK:2.8[X,opengl] virtual/glu )
	sctp? ( net-misc/lksctp-tools )
	tk? ( dev-lang/tk )"

S="${WORKDIR}/${MY_P}"

SITEFILE=50${PN}-gentoo.el

pkg_setup() {
	if use halfword ; then
		use amd64 || die "halfword support is limited to amd64"
	fi
}

src_prepare() {
	use odbc || sed -i 's: odbc : :' lib/Makefile

	# bug 263129, don't ignore LDFLAGS, reported upstream
	sed -e 's:LDFLAGS = \$(DED_LDFLAGS):LDFLAGS += \$(DED_LDFLAGS):' -i "${S}"/lib/megaco/src/flex/Makefile.in || die

	# don't ignore LDFLAGS, reported upstream
	sed -e 's:LDFLAGS =  \$(ODBC_LIB) \$(EI_LDFLAGS):LDFLAGS += \$(ODBC_LIB) \$(EI_LDFLAGS):' -i "${S}"/lib/odbc/c_src/Makefile.in || die

	if ! use wxwidgets; then
		sed -i 's: wx : :' lib/Makefile
		rm -rf lib/wx
	fi

	# Nasty workaround, reported upstream
	cp "${S}"/lib/configure.in.src "${S}"/lib/configure.in || die

	# bug 383697
	sed -i '1i#define OF(x) x' erts/emulator/drivers/common/gzio.c || die
}

src_configure() {
	use java || export JAVAC=false

	econf \
		--enable-threads \
		--enable-shared-zlib \ \
		$(use_enable sctp) \
		$(use_enable halfword halfword-emulator) \
		$(use_enable hipe) \
		$(use_with ssl ssl "${EPREFIX}"/usr) \
		$(use_enable ssl dynamic-ssl-lib) \
		$(use_enable kpoll kernel-poll) \
		$(use_enable smp smp-support) \
		$(use compat-ethread && echo "--enable-ethread-pre-pentium4-compatibility") \
		$(use x64-macos && echo "--enable-darwin-64bit") \
		|| die
}

src_compile() {
	use java || export JAVAC=false
	emake || die

	if use emacs ; then
		pushd lib/tools/emacs
		elisp-compile *.el || die
		popd
	fi
}

extract_version() {
	sed -n -e "/^$2 = \(.*\)$/s::\1:p" "${S}/$1/vsn.mk"
}

src_install() {
	local ERL_LIBDIR=/usr/$(get_libdir)/erlang
	local ERL_INTERFACE_VER=$(extract_version lib/erl_interface EI_VSN)
	local ERL_ERTS_VER=$(extract_version erts VSN)

	emake INSTALL_PREFIX="${D}" install || die
	dodoc AUTHORS README.md

	dosym "${ERL_LIBDIR}/bin/erl" /usr/bin/erl
	dosym "${ERL_LIBDIR}/bin/erlc" /usr/bin/erlc
	dosym "${ERL_LIBDIR}/bin/escript" /usr/bin/escript
	dosym \
		"${ERL_LIBDIR}/lib/erl_interface-${ERL_INTERFACE_VER}/bin/erl_call" \
		/usr/bin/erl_call
	dosym "${ERL_LIBDIR}/erts-${ERL_ERTS_VER}/bin/beam" /usr/bin/beam
	use smp && dosym "${ERL_LIBDIR}/erts-${ERL_ERTS_VER}/bin/beam.smp" /usr/bin/beam.smp

	## Remove ${D} from the following files
	sed -e "s:${D}::g" -i "${ED}${ERL_LIBDIR}/bin/erl" || die
	sed -e "s:${D}::g" -i "${ED}${ERL_LIBDIR}/bin/start" || die
	grep -rle "${D}" "${ED}/${ERL_LIBDIR}/erts-${ERL_ERTS_VER}" | xargs sed -i -e "s:${D}::g"

	## Clean up the no longer needed files
	rm "${ED}/${ERL_LIBDIR}/Install"||die

	for i in "${WORKDIR}"/man/man* ; do
		dodir "${ERL_LIBDIR}/${i##${WORKDIR}}"
	done
	for file in "${WORKDIR}"/man/man*/*.[1-9]; do
		# doman sucks so we can't use it
		cp ${file} "${ED}/${ERL_LIBDIR}"/man/man${file##*.}/
	done
	# extend MANPATH, so the normal man command can find it
	# see bug 189639
	dodir /etc/env.d/
	echo "MANPATH=\"${EPREFIX}${ERL_LIBDIR}/man\"" > "${ED}/etc/env.d/90erlang"

	if use doc ; then
		dohtml -A README,erl,hrl,c,h,kwc,info -r \
			"${WORKDIR}"/doc "${WORKDIR}"/lib "${WORKDIR}"/erts-*
	fi

	if use emacs ; then
		pushd "${S}"
		elisp-install erlang lib/tools/emacs/*.{el,elc}
		sed -e "s:/usr/share:${EPREFIX}/usr/share:g" \
			"${FILESDIR}"/${SITEFILE} > "${T}"/${SITEFILE}
		elisp-site-file-install "${T}"/${SITEFILE}
		popd
	fi

	newinitd "${FILESDIR}"/epmd.init epmd || die
}

pkg_postinst() {
	use emacs && elisp-site-regen
	elog
	elog "If you need a symlink to one of Erlang's binaries,"
	elog "please open a bug on https://bugs.gentoo.org/"
	elog
	elog "Gentoo's versioning scheme differs from the author's, so please refer to this version as ${MY_PV}"
	elog
}

pkg_postrm() {
	use emacs && elisp-site-regen
}