From 3cf7c3ef441822c889356fd1812ebf2944a59851 Mon Sep 17 00:00:00 2001
From: V3n3RiX <venerix@redcorelinux.org>
Date: Tue, 25 Aug 2020 10:45:55 +0100
Subject: gentoo resync : 25.08.2020

---
 eclass/python-utils-r1.eclass | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'eclass/python-utils-r1.eclass')

diff --git a/eclass/python-utils-r1.eclass b/eclass/python-utils-r1.eclass
index 9bad72a77e98..87cb662c64fd 100644
--- a/eclass/python-utils-r1.eclass
+++ b/eclass/python-utils-r1.eclass
@@ -45,6 +45,18 @@ _PYTHON_ALL_IMPLS=(
 )
 readonly _PYTHON_ALL_IMPLS
 
+# @ECLASS-VARIABLE: _PYTHON_HISTORICAL_IMPLS
+# @INTERNAL
+# @DESCRIPTION:
+# All historical Python implementations that are no longer supported.
+_PYTHON_HISTORICAL_IMPLS=(
+	jython2_7
+	pypy pypy1_{8,9} pypy2_0
+	python2_{5,6}
+	python3_{1,2,3,4,5}
+)
+readonly _PYTHON_HISTORICAL_IMPLS
+
 # @ECLASS-VARIABLE: PYTHON_COMPAT_NO_STRICT
 # @INTERNAL
 # @DESCRIPTION:
@@ -89,6 +101,28 @@ _python_impl_supported() {
 	esac
 }
 
+# @FUNCTION: _python_verify_patterns
+# @USAGE: <pattern>...
+# @INTERNAL
+# @DESCRIPTION:
+# Verify whether the patterns passed to the eclass function are correct
+# (i.e. can match any valid implementation).  Dies on wrong pattern.
+_python_verify_patterns() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	local impl pattern
+	for pattern; do
+		[[ ${pattern} == -[23] ]] && continue
+
+		for impl in "${_PYTHON_ALL_IMPLS[@]}" "${_PYTHON_HISTORICAL_IMPLS[@]}"
+		do
+			[[ ${impl} == ${pattern/./_} ]] && continue 2
+		done
+
+		die "Invalid implementation pattern: ${pattern}"
+	done
+}
+
 # @FUNCTION: _python_set_impls
 # @INTERNAL
 # @DESCRIPTION:
-- 
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