# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# @ECLASS: cmake.eclass
# @MAINTAINER:
# nelchael@gentoo.org
# @BLURB: wrap cmake
# @DESCRIPTION:
# The cmake eclass contains functions wrapping cmake to ease its usage in
# ebuilds. It allows both out of source and in source builds.

inherit toolchain-funcs multilib

EXPORT_FUNCTIONS src_compile src_install

DEPEND="${DEPEND}
	>=dev-util/cmake-2.4.6-r1"

CMAKE_BUILD_DIR="${WORKDIR}/cmake-build"

# Some packages don't build out of source, so if you want to build in source
# tree set CMAKE_IN_SOURCE_BUILD to anything before inheriting cmake.eclass:
[[ -n "${CMAKE_IN_SOURCE_BUILD}" ]] && CMAKE_BUILD_DIR="${S}"

# @FUNCTION: prepare_build_dir
# @USAGE:
# @DESCRIPTION:
# Create the build directory if it doesn't exist, this function should not be
# used outside of this eclass.
function prepare_build_dir() {

	if [[ ! -d "${CMAKE_BUILD_DIR}" ]]; then
		mkdir -p "${CMAKE_BUILD_DIR}" \
			|| die "mkdir \"${CMAKE_BUILD_DIR}\" failed"
	fi

}

# @FUNCTION: ecmake
# @USAGE:
# @DESCRIPTION:
# Run cmake to prepare makefiles, also prepares the build directory.
function ecmake() {

	prepare_build_dir

	pushd "${CMAKE_BUILD_DIR}" > /dev/null

	[[ -n "${CMAKE_VERBOSE}" ]] && \
		CMAKE_FLAGS="-DCMAKE_VERBOSE_MAKEFILE=1 ${CMAKE_FLAGS}"

	echo "cmake -DCMAKE_CXX_COMPILER=\"$(type -P $(tc-getCXX))\" -DCMAKE_CXX_FLAGS=\"${CXXFLAGS}\" -DCMAKE_C_COMPILER=\"$(type -P $(tc-getCC))\" -DCMAKE_C_FLAGS=\"${CFLAGS}\" -DCMAKE_INSTALL_PREFIX=\"/usr\" -DLIB_INSTALL_DIR=\"/usr/$(get_libdir)\" \"${S}\" ${CMAKE_FLAGS}"

	/usr/bin/cmake \
		-DCMAKE_CXX_COMPILER="$(type -P $(tc-getCXX))" \
		-DCMAKE_CXX_FLAGS="${CXXFLAGS}" \
		-DCMAKE_C_COMPILER="$(type -P $(tc-getCC))" \
		-DCMAKE_C_FLAGS="${CFLAGS}" \
		-DCMAKE_INSTALL_PREFIX="/usr" \
		-DLIB_INSTALL_DIR="/usr/$(get_libdir)" \
		${CMAKE_FLAGS} \
		"${S}" || die "cmake failed"

	popd > /dev/null

}

# @FUNCTION: cmake_src_compile
# @USAGE: <make arguments>
# @DESCRIPTION:
# Default src_compile for ebuilds using cmake, runs `ecmake' and then `emake'.
function cmake_src_compile() {

	ecmake

	pushd "${CMAKE_BUILD_DIR}" > /dev/null
	emake ${@} || die "emake failed"
	popd > /dev/null

}

# @FUNCTION: cmake_src_install
# @USAGE:
# @DESCRIPTION:
# Default src_install for ebuilds using cmake, runs `emake install' in build
# directory.
function cmake_src_install() {

	pushd "${CMAKE_BUILD_DIR}" > /dev/null
	emake DESTDIR="${D}" install || die "make install failed"
	popd > /dev/null

}