From 7ac3151dba659011178da29302c7b7207010454a Mon Sep 17 00:00:00 2001
From: Marek Szuba <marecki@gentoo.org>
Date: Mon, 5 Oct 2020 19:12:27 +0200
Subject: lua-utils.eclass: Support luajit

According to discussions on IRC, luajit should work as a drop-in
replacement for lua5.1 - and indeed, at least for x11-wm/awesome
it has worked.

Note that for the time being dev-lang/luajit uses the same module
directories as dev-lang/lua:5.1, which may lead to weird behaviour in
multi-impl ebuilds supporting both lua5-1 and luajit. Hopefully we will
get luajit to use its own directories so that it is fully independent,
same as we install pypy3 modules in their own directory hierarchy in
spite of compatibility with cpython-3.6.

Signed-off-by: Marek Szuba <marecki@gentoo.org>
---
 eclass/lua-utils.eclass | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

(limited to 'eclass')

diff --git a/eclass/lua-utils.eclass b/eclass/lua-utils.eclass
index 490d19a00198..24ef67635d55 100644
--- a/eclass/lua-utils.eclass
+++ b/eclass/lua-utils.eclass
@@ -14,8 +14,6 @@
 # A utility eclass providing functions to query Lua implementations,
 # install Lua modules and scripts.
 #
-# Please note that for the time being this eclass does NOT support luajit.
-#
 # This eclass neither sets any metadata variables nor exports any phase
 # functions. It can be inherited safely.
 
@@ -39,6 +37,7 @@ inherit toolchain-funcs
 # @DESCRIPTION:
 # All supported Lua implementations, most preferred last
 _LUA_ALL_IMPLS=(
+	luajit
 	lua5-1
 	lua5-2
 	lua5-3
@@ -141,9 +140,16 @@ _lua_wrapper_setup() {
 		local ELUA LUA
 		_lua_export "${impl}" ELUA LUA
 
-		# Lua interpreter and compiler
+		# Lua interpreter
 		ln -s "${EPREFIX}"/usr/bin/${ELUA} "${workdir}"/bin/lua || die
-		ln -s "${EPREFIX}"/usr/bin/${ELUA/a/ac} "${workdir}"/bin/luac || die
+
+		# Lua compiler, or a stub for it in case of luajit
+		if [[ ${ELUA} == luajit ]]; then
+			# Just in case
+			ln -s "${EPREFIX}"/bin/true "${workdir}"/bin/luac || die
+		else
+			ln -s "${EPREFIX}"/usr/bin/${ELUA/a/ac} "${workdir}"/bin/luac || die
+		fi
 
 		# pkg-config
 		ln -s "${EPREFIX}"/usr/$(get_libdir)/pkgconfig/${ELUA}.pc \
@@ -201,6 +207,10 @@ _lua_export() {
 	local impl var
 
 	case "${1}" in
+		luajit)
+			impl=${1}
+			shift
+			;;
 		lua*)
 			impl=${1/-/.}
 			shift
@@ -259,6 +269,9 @@ _lua_export() {
 			LUA_PKG_DEP)
 				local d
 				case ${impl} in
+					luajit)
+						LUA_PKG_DEP="dev-lang/luajit:="
+						;;
 					lua*)
 						LUA_PKG_DEP="dev-lang/lua:${impl#lua}"
 						;;
-- 
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