[gentoo-dev] [PATCH v2 7/7] distutils-r1.eclass: wire up meson-python to meson.eclass

["Michał Górny" <mgorny@gentoo.org>]

From: Eli Schwartz <eschwartz93@gmail.com>

The meson-python build backend -- as the name suggests -- uses meson
under the hood. We have a meson eclass which does lots of useful things
pertinent to meson. Make sure it gets invoked, by prying out the options
that meson_src_configure would use and setting passing them as our seed
values for gpep517.

[sam: Tweak '=' style.]
[sam: Tweak mesonargs->MESONARGS for final version of e9189344b971f7ee0e2bec36650c57dbade4f122.]
[sam: Update local variable list.]
[mgorny: Add local variables for LTO filtering.]

Signed-off-by: Eli Schwartz <eschwartz93@gmail.com>
Signed-off-by: Sam James <sam@gentoo.org>
Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
 eclass/distutils-r1.eclass | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/eclass/distutils-r1.eclass b/eclass/distutils-r1.eclass
index 134cb39f276a..e0c54d81a846 100644
--- a/eclass/distutils-r1.eclass
+++ b/eclass/distutils-r1.eclass
@@ -197,6 +197,10 @@ _DISTUTILS_R1_ECLASS=1
 inherit flag-o-matic
 inherit multibuild multilib multiprocessing ninja-utils toolchain-funcs
 
+if [[ ${DISTUTILS_USE_PEP517} == meson-python ]]; then
+	inherit meson
+fi
+
 if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
 	inherit python-r1
 else
@@ -1386,9 +1390,19 @@ distutils_pep517_install() {
 			)
 			;;
 		meson-python)
+			# variables defined by setup_meson_src_configure
+			local MESONARGS=() BOOST_INCLUDEDIR BOOST_LIBRARYDIR NM READELF
+			# it also calls filter-lto
+			local x
+			for x in $(all-flag-vars); do
+				local -x "${x}=${!x}"
+			done
+
+			setup_meson_src_configure "${DISTUTILS_ARGS[@]}"
+
 			local -x NINJAOPTS=$(get_NINJAOPTS)
 			config_settings=$(
-				"${EPYTHON}" - "${DISTUTILS_ARGS[@]}" <<-EOF || die
+				"${EPYTHON}" - "${MESONARGS[@]}" <<-EOF || die
 					import json
 					import os
 					import shlex
-- 
2.44.0