Use tar instead of npm for packaging. (apple#52)

Author: AdamSzApple

scripts/python/upi_unity_native_plugin_manager.py

@@ -1,7 +1,7 @@
 #! /usr/bin/env python3
 # Requirements: python3
 
-import os, shutil
+import os, shutil, json
 
 import scripts.python.upi_utility as utility
 import scripts.python.upi_toolchain as toolchain
@@ -392,9 +392,9 @@ def ValidateProjectVersions(self):
                 else:
                     CTX.printer.ErrorMessage("No Unity installations are being tracked. Please check your Unity installation root path or install the Unity Editor.")
 
-    # Packs plug-ins with npm and moves the resulting package to the currently configured build output folder.
+    # Packs plug-ins with tar and moves the resulting package to the currently configured build output folder.
     def GeneratePlugInPackages(self) -> None:
-        # Cache to return; npm should be invoked from the folder containing the associated package.json
+        # Cache to return; tar should be invoked from the folder containing the associated package.json
         working_dir = os.getcwd()
         for  plugin_id, native_plugin in self.native_unity_plugin_table.items():
             CTX.printer.StatusMessageWithContext("Packing plug-in: ", f"{plugin_id}", "\n")
@@ -424,8 +424,15 @@ def GeneratePlugInPackages(self) -> None:
                 utility.RunCommand(["mv", curr_demo_path, dest_demo_path])
                 utility.RunCommand(["mv", curr_demo_meta_path, dest_demo_meta_path])
 
-            pack_command = ["npm", "pack", f"{target_package_json_path.parent}", "--pack-destination", f"{CTX.build_output_path}"]
-            
+            # get the package name and version
+            package_json_file = open(target_package_json_path)
+            package_json_data = json.load(package_json_file)
+            tgz_filename = f"{package_json_data['name']}" "-" f"{package_json_data['version']}" ".tgz"
+            package_json_file.close()
+
+            # using tar:
+            pack_command = ["tar", "--auto-compress", "--create", "--file", f"{CTX.build_output_path.joinpath(tgz_filename)}", "--directory", f"{target_package_json_path.parent}", "-s", "/./package/", "." ]
+
             CTX.printer.MessageWithContext("Project package.json path: ", f"{target_package_json_path}", CTX.printer.Indent(1))
             CTX.printer.MessageWithContext("Pack command: ", f"{(' '.join(pack_command))}", CTX.printer.Indent(1))