Add dev-lua/luash

Signed-off-by: Shin'ya Minazuki <shinyoukai@chaotic.ninja>

dev-lua/luash/luash-9999.ebuild

@@ -0,0 +1,31 @@
+# Copyright 2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+LUA_COMPAT=( lua5-{1..4} )
+
+inherit git-r3 lua-single
+
+DESCRIPTION="Tiny library for shell scripting with Lua"
+HOMEPAGE="https://zserge.com/posts/luash/"
+EGIT_REPO_URI="https://github.com/zserge/luash"
+
+LICENSE="MIT"
+SLOT="0"
+# I assume match all architectures as unstable
+KEYWORDS="~*"
+
+src_unpack() {
+	git-r3_src_unpack
+}
+
+src_install() {
+	mkdir -p ${D}/${EPREFIX}$(lua_get_lmod_dir)/${PN}
+	cp -f ${S}/sh.lua ${D}/${EPREFIX}$(lua_get_lmod_dir)/${PN}
+}
+
+pkg_postinst() {
+	elog "Before calling require('sh') in any of your scripts, append $(lua_get_lmod_dir) to package.path"
+	einfo "package.path=[[/usr/share/lua/5.4/?/?.lua;]] .. package.path"
+	elog "This may be fixed in a following revision"
+}

dev-lua/luash/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>shinyoukai@chaotic.ninja</email>
+		<name>Shin'ya Minazuki</name>
+	</maintainer>
+</pkgmetadata>