add script for querying latest versions of packages

Makes update checking much faster.

x11-packages/get-latest-version.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+##
+##  Script for querying latest version of package.
+##
+
+if [ -z "${1}" ]; then
+    echo "Usage: check-pkg-version.sh [package name]"
+    echo
+    echo "This script retrieves current package version"
+    echo "from https://www.archlinux.org."
+fi
+
+for repo in extra community core; do
+    for arch in x86_64 any; do
+        VERSION=$(curl -s https://www.archlinux.org/packages/${repo}/${arch}/${1}/ | grep 'itemprop="version"' | cut -d'"' -f4 | cut -d- -f1)
+        if [ -n "${VERSION}" ]; then
+            echo "${1}: ${VERSION}"
+            exit 0
+        fi
+    done
+done
+
+exit 1