eclass/python-utils-r1: Sync with Gentoo

It's from Gentoo commit 5d8cc9a83de7eec8350aebcccd091c6b6c9ff2a5.

sdk_container/src/third_party/portage-stable/eclass/python-utils-r1.eclass

@@ -1273,6 +1273,78 @@ _python_check_occluded_packages() {
 # parameter, when calling epytest.  The listed files will be entirely
 # skipped from test collection.
 
+# @ECLASS_VARIABLE: EPYTEST_PLUGINS
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# An array of pytest plugin package names (without categories) to use
+# for the package.  It has a twofold purpose:
+#
+# 1. When set prior to calling distutils_enable_tests, it causes
+#    dependencies on the specified pytest plugins to be added.
+#
+# 2. When plugin autoloading is disabled, it causes "-p" arguments
+#    loading specified plugins to be added.
+#
+# Defaults to an empty list.
+#
+# The eclasses explicitly handle a number of pytest plugins, and assume
+# the default of "dev-python/${package}" and obtain "-p" via entry
+# points.  If this is incorrect for some plugin package, please report
+# a bug.
+#
+# This is not a perfect solution, and may not be sufficient for some
+# packages.  In these cases, either plugin autoloading should be used
+# or PYTEST_PLUGINS environment variable may be used directly (see
+# pytest documentation).
+#
+# For pytest-timeout and pytest-xdist plugins, it is generally
+# preferable to use EPYTEST_TIMEOUT and EPYTEST_XDIST options
+# that handle passing all needed options.
+
+# @ECLASS_VARIABLE: EPYTEST_PLUGIN_AUTOLOAD
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# If set to a non-empty value, permits pytest plugin autoloading.
+# Otherwise, PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 is set to disable it.
+#
+# If EPYTEST_PLUGINS is set explicitly or EAPI is 9 or later,
+# defaults to disabled.  Otherwise, defaults to enabled.
+# The recommended way to disable it in EAPI 8 or earlier is to set
+# EPYTEST_PLUGINS (possibly to an empty array).
+
+# @FUNCTION: _set_epytest_plugins
+# @INTERNAL
+# @DESCRIPTION:
+# Check if EPYTEST_PLUGINS is set correctly, and set the default
+# if it is not.
+_set_epytest_plugins() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	# TODO: drop BASH_VERSINFO check when we require EAPI 8
+	if [[ ${BASH_VERSINFO[0]} -ge 5 ]]; then
+		[[ ${EPYTEST_PLUGINS@a} == *a* ]]
+	else
+		[[ $(declare -p EPYTEST_PLUGINS) == "declare -a"* ]]
+	fi
+	if [[ ${?} -eq 0 ]]; then
+		# EPYTEST_PLUGINS set explicitly -- disable autoloading
+		: "${EPYTEST_PLUGIN_AUTOLOAD:=}"
+	else
+		if ! declare -p EPYTEST_PLUGINS &>/dev/null; then
+			# EPYTEST_PLUGINS unset -- default to empty.
+			# EPYTEST_PLUGIN_AUTOLOAD default depends on EAPI.
+			EPYTEST_PLUGINS=()
+			if [[ ${EAPI} != [78] ]]; then
+				: "${EPYTEST_PLUGIN_AUTOLOAD:=}"
+			else
+				: "${EPYTEST_PLUGIN_AUTOLOAD:=1}"
+			fi
+		else
+			die 'EPYTEST_PLUGINS must be an array.'
+		fi
+	fi
+}
+
 # @ECLASS_VARIABLE: EPYTEST_TIMEOUT
 # @DEFAULT_UNSET
 # @DESCRIPTION:
@@ -1324,6 +1396,9 @@ epytest() {
 	local color=yes
 	[[ ${NO_COLOR} ]] && color=no
 
+	mkdir -p "${T}/pytest-xml" || die
+	local junit_xml=$(mktemp "${T}/pytest-xml/${EPYTHON}-XXX.xml" || die)
+
 	local args=(
 		# verbose progress reporting and tracebacks
 		-vv
@@ -1345,9 +1420,44 @@ epytest() {
 		# we don't need to preserve them
 		-o tmp_path_retention_count=0
 		-o tmp_path_retention_policy=failed
+		# write a junit .xml file to aid machine processing of results
+		--junit-xml="${junit_xml}"
+		# use xunit1 format as that includes an explicit path
+		-o junit_family=xunit1
 	)
 
-	if [[ ! ${PYTEST_DISABLE_PLUGIN_AUTOLOAD} ]]; then
+	if has_version ">=dev-python/pytest-8.4.0"; then
+		args+=(
+			# do not repeat (potentially multi-line) exception messages
+			# in the "short summary" section to make it more readable;
+			# we have them in the backtraces anyway
+			--force-short-summary
+		)
+	fi
+
+	_set_epytest_plugins
+	if [[ ! ${EPYTEST_PLUGIN_AUTOLOAD} ]]; then
+		local -x PYTEST_DISABLE_PLUGIN_AUTOLOAD=1
+	fi
+
+	if [[ ${PYTEST_DISABLE_PLUGIN_AUTOLOAD} ]]; then
+		if [[ ${EPYTEST_PLUGINS[@]} ]]; then
+			local plugin_args=()
+			readarray -t -d '' plugin_args < <(
+				"${EPYTHON}" - "${EPYTEST_PLUGINS[@]}" <<-EOF || die
+					import sys
+					from importlib.metadata import distribution, entry_points
+					packages = {distribution(x).name for x in sys.argv[1:]}
+					eps = {
+						f"-p{x.name}" for x in entry_points(group="pytest11")
+						if x.dist.name in packages
+					}
+					sys.stdout.write("\\0".join(sorted(eps)))
+				EOF
+			)
+			args+=( "${plugin_args[@]}" )
+		fi
+	else
 		args+=(
 			# disable the undesirable-dependency plugins by default to
 			# trigger missing argument strips.  strip options that require