eclass/ros-catkin.eclass: Add CATKIN_IN_SOURCE_BUILD support.

eclass/ros-catkin.eclass

@@ -32,6 +32,11 @@ EGIT_REPO_URI="${ROS_REPO_URI}"
 # Usually, a repository contains several packages, hence a typical value is:
 # ROS_SUBDIR=${PN}
 
+# @ECLASS-VARIABLE: CATKIN_IN_SOURCE_BUILD
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Set to enable in-source build.
+
 SCM=""
 if [ "${PV#9999}" != "${PV}" ] ; then
 	SCM="git-r3"
@@ -140,12 +145,18 @@ HOMEPAGE="http://wiki.ros.org/${PN}"
 # Calls cmake-utils_src_prepare (so that PATCHES array is handled there) and initialises the workspace
 # by installing a recursive CMakeLists.txt to handle bundles.
 ros-catkin_src_prepare() {
+	# If no multibuild, just use cmake IN_SOURCE support
+	[ -n "${CATKIN_IN_SOURCE_BUILD}" ] && [ -z "${CATKIN_DO_PYTHON_MULTIBUILD}" ] && export CMAKE_IN_SOURCE_BUILD=yes
+
 	cmake-utils_src_prepare
 
 	if [ ! -f "${S}/CMakeLists.txt" ] ; then
 		catkin_init_workspace || die
 	fi
 
+	# If python multibuild, copy the sources
+	[ -n "${CATKIN_IN_SOURCE_BUILD}" ] && [ -n "${CATKIN_DO_PYTHON_MULTIBUILD}" ] && python_copy_sources
+
 	# Most packages require C++11 these days. Do it here, in src_prepare so that
 	# ebuilds can override it in src_configure.
 	append-cxxflags '-std=c++11'
@@ -163,6 +174,9 @@ ros-catkin_src_configure_internal() {
 			-DPYTHON_INSTALL_DIR="${sitedir#${EPREFIX}/usr/}"
 		)
 		python_export PYTHON_SCRIPTDIR
+		if [ -n "${CATKIN_IN_SOURCE_BUILD}" ] ; then
+			export CMAKE_USE_DIR="${BUILD_DIR}"
+		fi
 	fi
 	cmake-utils_src_configure "${@}"
 }
@@ -206,6 +220,9 @@ ros-catkin_src_configure() {
 # Builds a catkin-based package.
 ros-catkin_src_compile() {
 	if [ -n "${CATKIN_DO_PYTHON_MULTIBUILD}" ] ; then
+		if [ -n "${CATKIN_IN_SOURCE_BUILD}" ] ; then
+			export CMAKE_USE_DIR="${BUILD_DIR}"
+		fi
 		python_foreach_impl cmake-utils_src_compile "${@}"
 	else
 		cmake-utils_src_compile "${@}"
@@ -246,6 +263,9 @@ ros-catkin_src_test() {
 # Decorator around cmake-utils_src_install to ensure python scripts are properly handled w.r.t. python-exec2.
 ros-catkin_src_install_with_python() {
 	python_export PYTHON_SCRIPTDIR
+	if [ -n "${CATKIN_IN_SOURCE_BUILD}" ] ; then
+		export CMAKE_USE_DIR="${BUILD_DIR}"
+	fi
 	cmake-utils_src_install "${@}"
 	if [ ! -f "${T}/.catkin_python_symlinks_generated" -a -d "${D}/${PYTHON_SCRIPTDIR}" ]; then
 		dodir /usr/bin