ruby-ng.eclass: Indirect USE_RUBY into a function

eclass/ruby-fakegem.eclass

@@ -336,7 +336,7 @@ ruby_fakegem_binwrapper() {
 		# calling the script by default (see for instance the
 		# JRuby-specific commands).
 		local rubycmd=
-		for implementation in ${USE_RUBY}; do
+		for implementation in $(_ruby_get_all_impls); do
 			# ignore non-enabled implementations
 			use ruby_targets_${implementation} || continue
 			if [ -z $rubycmd ]; then

eclass/ruby-ng.eclass

@@ -109,6 +109,21 @@ ruby_implementation_depend() {
 	_ruby_implementation_depend $1
 }
 
+# @FUNCTION: _ruby_get_all_impls
+# @INTERNAL
+# @RETURN: list of valid values in USE_RUBY
+# Return a list of valid implementations in USE_RUBY, skipping the old
+# implementations that are no longer supported.
+_ruby_get_all_impls() {
+	local i
+	for i in ${USE_RUBY}; do
+		case ${i} in
+			*)
+				echo ${i};;
+		esac
+	done
+}
+
 # @FUNCTION: ruby_samelib
 # @RETURN: use flag string with current ruby implementations
 # @DESCRIPTION:
@@ -118,7 +133,7 @@ ruby_implementation_depend() {
 # more complex dependencies.
 ruby_samelib() {
 	local res=
-	for _ruby_implementation in $USE_RUBY; do
+	for _ruby_implementation in $(_ruby_get_all_impls); do
 		has -${_ruby_implementation} $@ || \
 			res="${res}ruby_targets_${_ruby_implementation}?,"
 	done
@@ -159,7 +174,7 @@ ruby_implementation_command() {
 _ruby_atoms_samelib() {
 	local atoms=$(_ruby_atoms_samelib_generic "$*")
 
-	for _ruby_implementation in $USE_RUBY; do
+	for _ruby_implementation in $(_ruby_get_all_impls); do
 		echo "${atoms//RUBYTARGET/ruby_targets_${_ruby_implementation}}"
 	done
 }
@@ -243,7 +258,7 @@ ruby_add_bdepend() {
 # Gets an array of ruby use targets enabled by the user
 ruby_get_use_implementations() {
 	local i implementation
-	for implementation in ${USE_RUBY}; do
+	for implementation in $(_ruby_get_all_impls); do
 		use ruby_targets_${implementation} && i+=" ${implementation}"
 	done
 	echo $i
@@ -254,7 +269,7 @@ ruby_get_use_implementations() {
 # Gets an array of ruby use targets that the ebuild sets
 ruby_get_use_targets() {
 	local t implementation
-	for implementation in ${USE_RUBY}; do
+	for implementation in $(_ruby_get_all_impls); do
 		t+=" ruby_targets_${implementation}"
 	done
 	echo $t
@@ -278,7 +293,7 @@ ruby_get_use_targets() {
 # RDEPEND="${DEPEND}"
 ruby_implementations_depend() {
 	local depend
-	for _ruby_implementation in ${USE_RUBY}; do
+	for _ruby_implementation in $(_ruby_get_all_impls); do
 		depend="${depend}${depend+ }ruby_targets_${_ruby_implementation}? ( $(ruby_implementation_depend $_ruby_implementation) )"
 	done
 	echo "${depend}"
@@ -358,7 +373,7 @@ _ruby_invoke_environment() {
 
 _ruby_each_implementation() {
 	local invoked=no
-	for _ruby_implementation in ${USE_RUBY}; do
+	for _ruby_implementation in $(_ruby_get_all_impls); do
 		# only proceed if it's requested
 		use ruby_targets_${_ruby_implementation} || continue
 
@@ -374,7 +389,7 @@ _ruby_each_implementation() {
 
 	if [[ ${invoked} == "no" ]]; then
 		eerror "You need to select at least one compatible Ruby installation target via RUBY_TARGETS in make.conf."
-		eerror "Compatible targets for this package are: ${USE_RUBY}"
+		eerror "Compatible targets for this package are: $(_ruby_get_all_impls)"
 		eerror
 		eerror "See https://www.gentoo.org/proj/en/prog_lang/ruby/index.xml#doc_chap3 for more information."
 		eerror