Skip package redownload in comparison script script, output diff to file

scripts/compare-package-contents.sh

@@ -12,21 +12,25 @@ pnpm -r exec pnpm pack --pack-destination ../../packs/packs-local
 
 # Download each package from npm as a tarball into the `packs/packs-npm` directory
 # Ensure matching major version
-mkdir -p packs/packs-npm
+mkdir -p packs/packs-npm packs/diffs
 for file in packs/packs-local/*.tgz; do
     tar_name="$(basename "$file" .tgz)"
     package_name="${tar_name%-*}" # strip version from tar file name
     package_version="${tar_name##*-}" # strip package name from tar file name
     package_version_major="${package_version%%.*}" # strip minor and patch version from package version
 
     # Download the corresponding package from npm
-    npm pack "$package_name@$package_version_major" --pack-destination packs/packs-npm
+    if [ -f "$(ls packs/packs-npm/"$package_name"-[0-9]*)" ]; then
+        echo "Package $package_name already downloaded"
+    else
+        npm pack "$package_name@$package_version_major" --pack-destination packs/packs-npm
+    fi
 
     echo "Comparing $package_name"
 
     # Get contents of current package's tarballs excluding the `docs` directory
     local_files=$(tar -tf packs/packs-local/"$package_name"-[0-9]* | sort | grep -v '^package/docs/')
     npm_files=$(tar -tf packs/packs-npm/"$package_name"-[0-9]* | sort | grep -v '^package/docs/')
 
-    diff <(echo "$local_files") <(echo "$npm_files") || true
+    diff_output=$(diff <(echo "$local_files") <(echo "$npm_files")) || echo "$diff_output" > "packs/diffs/$package_name.diff"
 done