# @FUNCTION: waf-utils_waflibdir

# @USAGE: [<waf-binary>]

# @DESCRIPTION:

# Echoes the absolute path to the directory containing the waf-based

# project's waflib python module. Ensures that the waflib shipped with a

# project is unpacked if it isn't already. This waflib may be safely

# patched because waf-lite will not touch the waflib directory if it

# already exists. Uses the waf binary specified in WAF_BINARY.

#

# @EXAMPLE

# The simplest case, for a monolithic compilation:

#

# @CODE

# pushd "$(waf-utils_waflibdir)" || die "Unable to patch waflib"

# epatch "${FILESDIR}"/${P}-waf-fix.patch

# popd

# @CODE

#

# Note that if you are using the python eclass and installating python

# modules, you must either call python_set_active_version or call

# waf-utils_waflibdir() from within a function run by

# python_execute(). This is because waf uses a different directory for

# waflib when using python3 than when using python2.

#

# @CODE

# SUPPORT_PYTHON_ABIS=1

# inherit eutils python waf-utils

#

# # Always use the waf associated with the current python ABI.

# WAF_BINARY=./waf

#

# src_prepare() {

# 	python_copy_sources

#

# 	myprepare() {

# 		epatch "${FILESDIR}"/${P}-sourcecode-fix.patch

#

# 		pushd "$(waf-utils_waflibdir)" || die "Unable to patch waflib"

# 		epatch "${FILESDIR}"/${P}-waf-fix.patch

# 		popd

# 	}

# 	python_execute_function -s myprepare

# }

# @CODE

waf-utils_waflibdir() {

	debug-print-function ${FUNCNAME} "$@"

	: ${WAF_BINARY:="${S}/waf"}

	python -c "import imp, sys; sys.argv[0] = '${WAF_BINARY}'; waflite = imp.load_source('waflite', '${WAF_BINARY}'); print(waflite.find_lib());" \

		|| die "Unable to locate or unpack waflib module from the waf script at ${WAF_BINARY}"

}