Add Emscripten support in Conan package: handle JS/WASM assets and set threading option

Author: saumyaj3

conanfile.py

@@ -121,6 +121,8 @@ def build_requirements(self):
     def config_options(self):
         if self.settings.os == "Windows":
             del self.options.fPIC
+        if self.settings.os == "Emscripten":
+            self.options.threading = "std" # Default to a supported option
 
     def configure(self):
         if self.options.shared:
@@ -164,14 +166,17 @@ def deploy(self):
         copy(self, "*", src=os.path.join(self.package_folder, "bin"), dst=self.install_folder)
 
     def package(self):
-        copy(self, pattern="libnest2d_js*", src=os.path.join(self.build_folder, "libnest2d_js"),
-             dst=os.path.join(self.package_folder, "bin"))
-        copy(self, f"*.d.ts", src=self.build_folder, dst=os.path.join(self.package_folder, "bin"), keep_path = False)
-        copy(self, f"*.js", src=self.build_folder, dst=os.path.join(self.package_folder, "bin"), keep_path = False)
-        copy(self, f"*.wasm", src=self.build_folder, dst=os.path.join(self.package_folder, "bin"), keep_path = False)
         packager = AutoPackager(self)
         packager.run()
 
+        # Specifically handle the Emscripten assets
+        if self.settings.os == "Emscripten":
+            bin_dir = os.path.join(self.package_folder, "bin")
+            build_dir = self.build_folder
+            copy(self, "libnest2d_js.js", build_dir, bin_dir)
+            copy(self, "libnest2d_js.wasm", build_dir, bin_dir)
+            copy(self, "*.d.ts", build_dir, bin_dir, keep_path=False)
+
         # Remove the header files from options not used in this package
         if self.options.geometries != "clipper":
             files.rmdir(self, os.path.join(self.package_folder, "include", "libnest2d", "backends", "clipper"))
@@ -192,3 +197,6 @@ def package_info(self):
         # npm package json for Emscripten builds
         if self.settings.os == "Emscripten" or self.options.get_safe("with_js_bindings", False):
             self.python_requires["npmpackage"].module.conf_package_json(self)
+            # Expose the path to the JS/WASM assets for consumers
+            js_asset_path = os.path.join(self.package_folder, "bin")
+            self.conf_info.define("user.nest2d:js_path", js_asset_path)