Make .mpk (zip) app bundles deterministic

scripts/bundleapps.sh

@@ -19,24 +19,26 @@ echo "[" | tee -a "$outputjson"
 # currently, this script doesn't purge unnecessary information from the manifests, such as activities
 
 for apprepo in internal_filesystem/apps internal_filesystem/builtin/apps; do
-	echo "Listing apps in $apprepo"
-	ls -1 "$apprepo" | while read appdir; do
-	    echo "Bundling $apprepo/$appdir"
-	    pushd "$apprepo"/"$appdir"
-	    manifest=META-INF/MANIFEST.JSON
-	    version=$( jq -r '.version' "$manifest" )
-            cat "$manifest" | tee -a "$outputjson"
-	    echo -n "," | tee -a "$outputjson"
-            thisappdir="$output"/apps/"$appdir"
-            mkdir -p "$thisappdir"
-            mkdir -p "$thisappdir"/mpks
-            mkdir -p "$thisappdir"/icons
-	    mpkname="$thisappdir"/mpks/"$appdir"_"$version".mpk
-	    echo "Creating $mpkname"
-	    zip -r0 "$mpkname" .
-	    cp res/mipmap-mdpi/icon_64x64.png "$thisappdir"/icons/"$appdir"_"$version"_64x64.png
-	    popd
-	done
+    echo "Listing apps in $apprepo"
+    ls -1 "$apprepo" | while read appdir; do
+        echo "Bundling $apprepo/$appdir"
+        pushd "$apprepo"/"$appdir"
+        manifest=META-INF/MANIFEST.JSON
+        version=$( jq -r '.version' "$manifest" )
+        cat "$manifest" | tee -a "$outputjson"
+        echo -n "," | tee -a "$outputjson"
+        thisappdir="$output"/apps/"$appdir"
+        mkdir -p "$thisappdir"
+        mkdir -p "$thisappdir"/mpks
+        mkdir -p "$thisappdir"/icons
+        mpkname="$thisappdir"/mpks/"$appdir"_"$version".mpk
+        echo "Setting file modification times to a fixed value..."
+        find . -type f -exec touch -t 202501010000.00 {} \;
+        echo "Creating $mpkname with deterministic file order..."
+        find . -type f | sort | TZ=CET zip -X "$mpkname" -@
+        cp res/mipmap-mdpi/icon_64x64.png "$thisappdir"/icons/"$appdir"_"$version"_64x64.png
+        popd
+    done
 done
 
 # remove the last , to have valid json: