common/hooks/post-install: reorder some hooks so that no unnecessary INSTALL/REMOVE scripts are generated.

common/hooks/post-install/04-create-xbps-vpkg-files.sh

@@ -0,0 +1,17 @@
+# This hook generates XBPS configuration files for virtual packages.
+
+hook() {
+	local _tmpf
+
+	# If package provides virtual packages, create dynamically the
+	# required configuration file.
+	if [ -n "$provides" ]; then
+		_tmpf=$(mktemp) || msg_error "$pkgver: failed to create tempfile.\n"
+		echo "# Virtual packages provided by '${pkgname}':" >>${_tmpf}
+		for f in ${provides}; do
+			echo "virtualpkg=${f}:${pkgname}" >>${_tmpf}
+		done
+		install -Dm644 ${_tmpf} ${PKGDESTDIR}/etc/xbps/virtualpkg.d/${pkgname}.vpkg
+		rm -f ${_tmpf}
+	fi
+}