Replace common functionality with rust implementation

update-aur-pkgs.sh

@@ -1,8 +1,16 @@
 #!/usr/bin/env bash
 
 for pkg in pkgbuilds/* ; do
-    printf "checking %s\n" "${pkg}"
-    git submodule update --remote "${pkg}"
+    if [[ -n "$(builtin cd "${pkg}" && git rev-parse --show-superproject-working-tree)" ]] ; then
+        printf "checking git submodule %s\n" "${pkg}"
+        git submodule update --remote "${pkg}"
+    else
+        printf "checking local package %s\n" "${pkg}"
+        (
+            builtin cd "${pkg}" || exit 1
+            makepkg --nodeps --nobuild --noextract
+        )
+    fi
     if git status --porcelain "${pkg}" | grep -q . ; then
         git add "${pkg}"
         git commit -m "aur: Update $(basename "${pkg}")"