testing/lua-dromozoa-utf8: new aport

https://github.com/dromozoa/dromozoa-utf8/
Lua 5.3 compatible pure-Lua UTF-8 implementation

testing/lua-dromozoa-utf8/APKBUILD

+# Contributor: Jakub Jirutka <jakub@jirutka.cz>
+# Maintainer: Jakub Jirutka <jakub@jirutka.cz>
+pkgname=lua-dromozoa-utf8
+_pkgname=dromozoa-utf8
+pkgver=1.3
+pkgrel=0
+pkgdesc="Lua 5.3 compatible pure-Lua UTF-8 implementation"
+url="https://github.com/dromozoa/dromozoa-utf8/"
+arch="all"
+license="GPL3"
+depends=""
+checkdepends=""
+source="$pkgname-$pkgver.tar.gz::https://github.com/dromozoa/$_pkgname/archive/v$pkgver.tar.gz"
+builddir="$srcdir/$_pkgname-$pkgver"
+
+# luajit is not available for selected arches
+case "$CARCH" in
+	s390x) _luajit="";;
+	*) checkdepends="$checkdepends luajit" _luajit="jit";;
+esac
+
+_luaversions="5.1 5.2 5.3"
+for _v in $_luaversions; do
+	subpackages="$subpackages lua$_v-${pkgname#lua-}:_subpackage"
+	checkdepends="$checkdepends lua$_v"
+done
+
+check() {
+	local out
+	cd "$builddir"
+
+	local lver; for lver in $_luaversions $_luajit; do
+		msg "Testing on lua$lver"
+		out=$(lua$lver test.lua test.exp 2>&1) || {
+			echo "Tests failed, printing last 30 lines of the output..."
+			printf '%s\n' "$out" | tail -n 30
+			return 1
+		}
+	done
+}
+
+package() {
+	mkdir -p "$pkgdir"
+}
+
+_subpackage() {
+	local lver="${subpkgname:3:3}"
+	pkgdesc="$pkgdesc (for Lua $lver)"
+	depends="lua$lver"
+	install_if="$pkgname=$pkgver-r$pkgrel lua$lver"
+	local lmod_dir="$subpkgdir/usr/share/lua/$lver"
+
+	cd "$builddir"
+	mkdir -p "$lmod_dir"
+	cp -r dromozoa "$lmod_dir"/
+}
+
+sha512sums="c1894692f80cc2204683b7a8f540d59b1a23447bc61492acef3c6bac7f50884ca39b0b372e2d56f4473b92a8263da2c705243e7c341eea43583578964bedd4f4  lua-dromozoa-utf8-1.3.tar.gz"