fix: fix logs and prevent empty normalisation

Author: tomgrv

src/common-utils/_configure-feature.sh

@@ -77,12 +77,13 @@ for package in package composer; do
         echo "{}" >$package.json
     else
         # Pre-sort the existing package.json
+        echo "${Yellow}Pre-merge normalize $package.json${None}"
         normalize-json -t ${tabSize:-4} $package.json
     fi
 
     # Merge all package folder json files into the top-level package.json
     find $source -maxdepth 1 -name _*.$package.json | sort | while read file; do
-        echo "${Yellow}Merge $file${None}"
+        echo "${Yellow}Merge $file in $package.json${None}"
         jq --indent ${tabSize:-4} -s '.[0] * .[1]' $file $package.json >/tmp/$package.json && mv -f /tmp/$package.json $package.json
     done
 

src/common-utils/_normalize-json.sh

@@ -608,12 +608,16 @@ if validate "$json" "$schema"; then
 else
     echo -e "${Red}JSON is empty or invalid${None}" >&2
     exit 1
-fi | traverse $json >/tmp/$$.json
+fi >/tmp/$$.json
 
-if test -z "$save"; then
-    jq -C --indent ${tabSize:-2} . /tmp/$$.json
-else
-    jq -M --indent ${tabSize:-4} . /tmp/$$.json >$json
+# Handle output
+if test -s /tmp/$$.json; then
+    if test -z "$save"; then
+        traverse $json /tmp/$$.json | jq -C --indent ${tabSize:-2} .
+    else
+        traverse $json /tmp/$$.json | jq -M --indent ${tabSize:-4} . >$json
+    fi
 fi
 
-#rm -f /tmp/$$.json
+# Clean up
+rm -f /tmp/$$.json

src/common-utils/devcontainer-feature.json

@@ -1,6 +1,6 @@
 {
     "name": "Common Utils",
-    "version": "3.3.0",
+    "version": "3.3.2",
     "description": "Common utils for tomgrv/devcontainer-features",
     "dependsOn": {
         "ghcr.io/devcontainers/features/common-utils": {}