main/icu: add subpackage -data with .dat file and TODO note

main/icu/APKBUILD

 # Contributor: Sergey Lukin <sergej.lukin@gmail.com>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
+#
+# TODO: After 3.13 is released, change data-packaging to "archive" and split
+# data into multiple variants (English-only, all, ...).
 pkgname=icu
 pkgver=67.1
-pkgrel=1
+pkgrel=2
 pkgdesc="International Components for Unicode library"
 url="http://site.icu-project.org/"
 arch="all"
 license="MIT ICU Unicode-TOU"
-subpackages="$pkgname-static $pkgname-dev $pkgname-doc $pkgname-libs"
+subpackages="$pkgname-static $pkgname-dev $pkgname-doc $pkgname-libs $pkgname-data::noarch"
 depends_dev="$pkgname=$pkgver-r$pkgrel"
 checkdepends="diffutils python3"
 source="https://github.com/unicode-org/icu/releases/download/release-${pkgver//./-}/icu4c-${pkgver//./_}-src.tgz"
@@ -65,4 +68,12 @@ libs() {
 	replaces="icu"
 }
 
+data() {
+	pkgdesc="ICU data in a .dat package file"
+	local majorver=${pkgver%%.*}
+
+	install -Dm644 "$builddir"/data/in/icudt${majorver}l.dat \
+		"$subpkgdir"/usr/share/icu/$pkgver/icudt${majorver}l.dat
+}
+
 sha512sums="4779f1ce1ca7976f6fad6768853ea8c540da54d11509e3b6cfd864a04b5f2db1c3d4b546387f91ad02fb90804525bc37d2543173f0d705d6ca11dc6f2b7640a8  icu4c-67_1-src.tgz"