Initial commit of waf-utils eclass

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+# Copyright 1999-2010 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/waf-utils.eclass,v 1.1 2010/12/07 06:48:08 eva Exp $
+
+# @ECLASS: waf-utils.eclass
+# @MAINTAINER:
+# gnome@gentoo.org
+#
+# @CODE
+# Original Author: Gilles Dartiguelongue <eva@gentoo.org>
+# @CODE
+# @BLURB: common ebuild functions for waf-based packages
+# @DESCRIPTION:
+# The waf-utils eclass contains functions that make creating ebuild for
+# waf-based packages much easier.
+# Its main features are support of common portage default settings.
+
+inherit base eutils multilib python
+
+case ${EAPI:-0} in
+	3|2) EXPORT_FUNCTIONS pkg_setup src_configure src_compile src_install ;;
+	*) die "EAPI=${EAPI} is not supported" ;;
+esac
+
+# @ECLASS-VARIABLE: DOCS
+# @DESCRIPTION:
+# Documents passed to dodoc command.
+
+# @FUNCTION: waf-utils_src_configure
+# @DESCRIPTION:
+# General function for configuring with waf.
+waf-utils_pkg_setup() {
+	python_set_active_version 2
+}
+
+# @FUNCTION: waf-utils_src_configure
+# @DESCRIPTION:
+# General function for configuring with waf.
+waf-utils_src_configure() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	CCFLAGS="${CFLAGS}" LINKFLAGS="${LDFLAGS}" "${S}"/waf \
+		--prefix=/usr \
+		--libdir=/usr/$(get_libdir) \
+		$@ \
+		configure || die "configure failed"
+}
+
+# @FUNCTION: waf-utils_src_compile
+# @DESCRIPTION:
+# General function for compiling with waf.
+waf-utils_src_compile() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local jobs=$(echo -j1 ${MAKEOPTS} | sed -r "s/.*(-j\s*|--jobs=)([0-9]+).*/--jobs=\2/" )
+	"${S}"/waf build ${jobs} || die "build failed"
+}
+
+# @FUNCTION: waf-utils_src_install
+# @DESCRIPTION:
+# Function for installing the package.
+waf-utils_src_install() {
+	debug-print-function ${FUNCNAME} "$@"
+	has ${EAPI:-0} 2 && ! use prefix && ED="${D}"
+
+	"${S}"/waf --destdir="${ED}" install  || die "Make install failed"
+
+	# Manual document installation
+	[[ -n "${DOCS}" ]] && { dodoc ${DOCS} || die "dodoc failed" ; }
+}
+