[gentoo-dev] [PATCH python-r1 3/8] Add python_export_best() to obtain best impl info.

[Michał Górny]

---
 gx86/eclass/python-r1.eclass | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gx86/eclass/python-r1.eclass b/gx86/eclass/python-r1.eclass
index b059a3b..d7cdfa8 100644
--- a/gx86/eclass/python-r1.eclass
+++ b/gx86/eclass/python-r1.eclass
@@ -387,3 +387,28 @@ python_foreach_impl() {
 		fi
 	done
 }
+
+# @FUNCTION: python_export_best
+# @USAGE: [<variable>...]
+# @DESCRIPTION:
+# Find the best (most preferred) Python implementation enabled
+# and export given variables for it. If no variables are provided,
+# EPYTHON & PYTHON will be exported.
+python_export_best() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	[[ ${#} -gt 0 ]] || set -- EPYTHON PYTHON
+
+	local impl best
+	for impl in "${_PYTHON_ALL_IMPLS[@]}"; do
+		if has "${impl}" "${PYTHON_COMPAT[@]}" && use "python_targets_${impl}"
+		then
+			best=${impl}
+		fi
+	done
+
+	[[ ${best+1} ]] || die "python_export_best(): no implementation found!"
+
+	debug-print "${FUNCNAME}: Best implementation is: ${impl}"
+	python_export "${impl}" "${@}"
+}
-- 
1.7.12.4