Revive generation script, which seems to have failed untraceably until recently

generation/check-for-git-changes.sh

@@ -13,10 +13,10 @@ if [ "isGitClean" = true ] ; then
     git stash
 fi
 
-
 npm run build
 
-if [[ $(git diff -- . ':(exclude)/*package.json') ]]; then
+gitDiff=`git --no-pager diff -- .. ":(exclude)../**/package.json"`
+if [[ -n "${gitDiff}" ]]; then
     printf "\n\n"
     echo "There seem to be changes after running the code generation."
     echo "This might be because you updated a native dependency and forgot to run the code generation."
@@ -25,7 +25,8 @@ if [[ $(git diff -- . ':(exclude)/*package.json') ]]; then
     echo "Another source of this error might be that you have changed generated code and checked it in."
     echo "You should not be doing this, please change the source of the generated code and not the code itself."
     printf "\n"
-    echo "$(git diff)"
+    echo "Diff summary:"
+    echo "${gitDiff}"
 
     if [ "isGitClean" = true ] ; then
       git stash pop
@@ -35,4 +36,4 @@ else
     if [ "isGitClean" = true ] ; then
       git stash pop
     fi
-fi
+fi