Added xonsh shell from rindeal repo.

eclass/arrays.eclass

@@ -0,0 +1,55 @@
+# Copyright 2016-2019 Jan Chren (rindeal)
+# Distributed under the terms of the GNU General Public License v2
+
+###
+# Usage:
+#
+#     CDEPEND_A=()
+#     DEPEND_A=( "${CDEPEND_A[@]}" )
+#     RDEPEND_A=( "${CDEPEND_A[@]}" )
+#
+#     inherit arrays
+#
+###
+
+
+case "${EAPI:-0}" in
+'6' | '7' ) ;;
+* ) die "Unsupported EAPI='${EAPI}' for '${ECLASS}'" ;;
+esac
+
+
+_v_a=(
+	HOMEPAGE LICENSE
+
+	SRC_URI
+
+	KEYWORDS
+	IUSE
+
+	{C,,R,P,B}DEPEND
+
+	REQUIRED_USE
+
+	## java-*.eclass:
+	CP_DEPEND
+	JAVA_SRC_DIR
+)
+for _v in "${_v_a[@]}"
+do
+	if [[ "$(declare -p ${_v}_A 2>/dev/null)" == "declare -a"* ]]
+	then
+		debug-print "${ECLASS}: Converting '${_v}_A' to '${_v}'"
+
+		debug-print "${ECLASS}: Current value='${!_v}'"
+		eval "${_v}=\" \${${_v}_A[*]}\""
+		debug-print "${ECLASS}: New value='${!_v}'"
+
+		debug-print "${ECLASS}: Unsetting '${_v}_A'"
+		unset "${_v}_A"
+	elif [[ -v ${_v} ]]
+	then
+		debug-print "${ECLASS}: Variable '${_v}' exists, but is not an array."
+	fi
+done
+unset _v _v_a