# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/dev-lang/erlang/erlang-11.2.4-r1.ebuild,v 1.1 2007/05/21 06:27:20 opfer Exp $

inherit elisp-common eutils flag-o-matic multilib versionator

# NOTE: You	 need to adjust the version number	in the last comment.  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.
MY_PV="R$(get_major_version)B-$(get_version_component_range 3)"

# 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/${MY_P}.tar.gz
	doc? ( http://erlang.org/download/otp_doc_man_${MY_PV}.tar.gz
		http://erlang.org/download/otp_doc_html_${MY_PV}.tar.gz )"

LICENSE="EPL"
SLOT="0"
KEYWORDS="~alpha ~amd64 ~ppc ~ppc64 ~sparc ~x86"
IUSE="doc emacs hipe java kpoll odbc smp ssl tk"

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}
	tk? ( dev-lang/tk )"

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

SITEFILE=50erlang-gentoo.el

pkg_setup() {
	if use hipe; then
		ewarn
		ewarn "You enabled High performance Erlang. Be aware that this extension"
		ewarn "can break the compilation in many ways, especially on hardened systems."
		ewarn "Don't cry, don't file bugs, just disable it!"
		ewarn
	fi
}

src_unpack() {
	## fix compilation on hardened systems, see bug #154338
	filter-flags "-fstack-protector"
	filter-flags "-fstack-protector-all"

	unpack ${A}
	cd "${S}"

	# needed for amd64
	epatch "${FILESDIR}/${PN}-10.2.6-export-TARGET.patch"
	use odbc || sed -i 's: odbc : :' lib/Makefile

	# delete internal copy of zlib, so the system one is used, see bug #178996
	rm "${S}/erts/emulator/zlib/zconf.h" "${S}/erts/emulator/zlib/zlib.h"
}

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

	econf \
		--enable-threads \
		$(use_enable hipe) \
		$(use_with ssl) \
		$(use_enable kpoll kernell-poll) \
		$(use_enable smp smp-support) \
		|| die "econf failed"
	emake -j1 || die "emake failed"

	if use emacs ; then
		pushd lib/tools/emacs
		elisp-compile *.el
		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 -j1 INSTALL_PREFIX="${D}" install || die "install failed"
	dodoc AUTHORS EPLICENCE README

	dosym ${ERL_LIBDIR}/bin/erl /usr/bin/erl
	dosym ${ERL_LIBDIR}/bin/erlc /usr/bin/erlc
	dosym ${ERL_LIBDIR}/bin/ear /usr/bin/ear
	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

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

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

	if use doc ; then
		for i in "${WORKDIR}"/man/man* ; do
			dodir /usr/share/${i##${WORKDIR}}erl
		done
		for file in "${WORKDIR}"/man/man*/*.[1-9]; do
			# Avoid namespace collisions
			local newfile=${file}erl
			cp ${file} ${newfile}
			# Man page processing tools expect a capitalized "SEE ALSO" section
			# header
			sed -i -e 's,\.SH See Also,\.SH SEE ALSO,g' ${newfile}
			# doman sucks so we can't use it
			cp ${newfile} "${D}"/usr/share/man/man${newfile##*.}/
		done
		dohtml -A README,erl,hrl,c,h,kwc,info -r \
			"${WORKDIR}"/doc "${WORKDIR}"/lib "${WORKDIR}"/erts-*
	fi

	if use emacs ; then
		pushd "${S}"
		elisp-install erlang lib/tools/emacs/*.{el,elc}
		elisp-site-file-install "${FILESDIR}"/${SITEFILE}
		popd
	fi
}

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 and tell the maintainers."
	elog
	elog "Gentoo's versioning scheme differs from the author's, so please refer to this version as R11B-4"
	elog
}

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