From 433ae7d2b54dfd881b2f6b10fab5eed763f6e1ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny@gentoo.org>
Date: Sun, 23 Nov 2025 20:38:37 +0100
Subject: [PATCH] distutils-r1.eclass: Add DISTUTILS_CONFIG_SETTINGS_JSON
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Add DISTUTILS_CONFIG_SETTINGS_JSON that can be used to specify the JSON
data for config_settings directly.  For the time being, this is only
supported for standalone backends, since we can never know what
arguments they expect and we do not want the value to conflict with any
future defaults for known backends.

This is going to be used by the next version of x11-wm/qtile to control
building the Wayland support (currently handled by sed in the backend
code).

Signed-off-by: Michał Górny <mgorny@gentoo.org>
Part-of: https://github.com/gentoo/gentoo/pull/44745
Closes: https://github.com/gentoo/gentoo/pull/44745
Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
 eclass/distutils-r1.eclass | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/eclass/distutils-r1.eclass b/eclass/distutils-r1.eclass
index c7a17dd39863..5980cc47e5f7 100644
--- a/eclass/distutils-r1.eclass
+++ b/eclass/distutils-r1.eclass
@@ -415,6 +415,28 @@ unset -f _distutils_set_globals
 # }
 # @CODE
 
+# @ECLASS_VARIABLE: DISTUTILS_CONFIG_SETTINGS_JSON
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# The JSON object deserialized into config_settings dictionary passed
+# to the build backend.
+#
+# Allowed only for DISTUTILS_USE_PEP517=standalone.  Use DISTUTILS_ARGS
+# for other backends.
+#
+# Example:
+# @CODE
+# python_configure_all() {
+# 	DISTUTILS_CONFIG_SETTINGS_JSON='
+# 		{
+# 			"verbose": true,
+# 			"targets": ["foo", "bar"],
+# 			"build-type": "release"
+# 		}
+# 	'
+# }
+# @CODE
+
 # @FUNCTION: distutils_enable_sphinx
 # @USAGE: <subdir> [--no-autodoc | <plugin-pkgs>...]
 # @DESCRIPTION:
@@ -1197,6 +1219,12 @@ distutils_pep517_install() {
 			;;
 	esac
 
+	if [[ ${DISTUTILS_USE_PEP517} == standalone ]]; then
+		config_settings=${DISTUTILS_CONFIG_SETTINGS_JSON}
+	elif [[ -n ${DISTUTILS_CONFIG_SETTINGS_JSON} ]]; then
+		die "DISTUTILS_CONFIG_SETTINGS_JSON supported only for standalone backends"
+	fi
+
 	# https://pyo3.rs/latest/building-and-distribution.html#cross-compiling
 	if tc-is-cross-compiler; then
 		local -x PYO3_CROSS_LIB_DIR=${SYSROOT}/$(python_get_stdlib)