feature: Changes build script to only rebuild upon changes.

buildall.sh

@@ -1,12 +1,22 @@
 #!/usr/bin/env bash
+mkdir meta > /dev/null 2> /dev/null
+
 for FILE in kitteh-node-*/*; do
   FILE_NO_EXTENSION="${FILE/".nix"/""}"
 
-  if [ ! -f "out/$FILE_NO_EXTENSION.vma.zst" ] || git diff --exit-code $FILE; then
+  # Hacky!
+  mkdir -p meta/$FILE
+  rm -rf meta/$FILE
+
+  sha512sum $FILE > /tmp/kt-clusterbuild_sha512sum
+
+  if [ ! -f "meta/$FILE.sha" ] || ! diff -q "/tmp/kt-clusterbuild_sha512sum" "meta/$FILE.sha" > /dev/null; then
     ./build.sh $FILE_NO_EXTENSION
   else
     echo "Not building '$FILE_NO_EXTENSION'."
   fi
+
+  mv "/tmp/kt-clusterbuild_sha512sum" "meta/$FILE.sha"
 done
 
 echo "Done building."