Add auto-updater

.gitignore

@@ -1,3 +1,4 @@
 *
 !.gitignore
 !PKGBUILD
+!update_version.sh

update_version.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -euxo pipefail
+
+# Read pkg name
+PKG=$(awk -F '=' '/pkgname=/{ print $2 }' PKGBUILD)
+
+# Get latest version
+VER=$(curl -sSfL "https://lv.luzifer.io/v1/catalog/cluster-api/latest/version")
+
+# Insert latest version into PKGBUILD
+sed -i \
+  -e "s/^pkgver=.*/pkgver=${VER}/" \
+  PKGBUILD
+
+# Check whether this changed anything
+if (git diff --exit-code PKGBUILD); then
+  echo "Package ${PKG} has most recent version ${VER}"
+  exit 0
+fi
+
+# Reset pkgrel
+sed -i \
+  -e 's/pkgrel=.*/pkgrel=1/' \
+  PKGBUILD
+
+# Update source hashes
+updpkgsums
+
+# Commit changes
+git add PKGBUILD
+git commit -m "${PKG} v${VER}"