SCons: Remove run_in_subprocess dependency

platform_methods.py

@@ -8,75 +8,6 @@ import subprocess
 
 # NOTE: The multiprocessing module is not compatible with SCons due to conflict on cPickle
 
-JSON_SERIALIZABLE_TYPES = (bool, int, float, str)
-
-
-def run_in_subprocess(builder_function):
-    @functools.wraps(builder_function)
-    def wrapper(target, source, env):
-        # Convert SCons Node instances to absolute paths
-        target = [node.srcnode().abspath for node in target]
-        source = [node.srcnode().abspath for node in source]
-
-        # Short circuit on non-Windows platforms, no need to run in subprocess
-        if sys.platform not in ("win32", "cygwin"):
-            return builder_function(target, source, env)
-
-        # Identify module
-        module_name = builder_function.__module__
-        function_name = builder_function.__name__
-        module_path = sys.modules[module_name].__file__
-        if module_path.endswith(".pyc") or module_path.endswith(".pyo"):
-            module_path = module_path[:-1]
-
-        # Subprocess environment
-        subprocess_env = os.environ.copy()
-        subprocess_env["PYTHONPATH"] = os.pathsep.join([os.getcwd()] + sys.path)
-
-        # Keep only JSON serializable environment items
-        filtered_env = dict((key, value) for key, value in env.items() if isinstance(value, JSON_SERIALIZABLE_TYPES))
-
-        # Save parameters
-        args = (target, source, filtered_env)
-        data = dict(fn=function_name, args=args)
-        json_path = os.path.join(os.environ["TMP"], uuid.uuid4().hex + ".json")
-        with open(json_path, "wt", encoding="utf-8", newline="\n") as json_file:
-            json.dump(data, json_file, indent=2)
-        json_file_size = os.stat(json_path).st_size
-
-        if env["verbose"]:
-            print(
-                "Executing builder function in subprocess: "
-                "module_path=%r, parameter_file=%r, parameter_file_size=%r, target=%r, source=%r"
-                % (module_path, json_path, json_file_size, target, source)
-            )
-        try:
-            exit_code = subprocess.call([sys.executable, module_path, json_path], env=subprocess_env)
-        finally:
-            try:
-                os.remove(json_path)
-            except OSError as e:
-                # Do not fail the entire build if it cannot delete a temporary file
-                print(
-                    "WARNING: Could not delete temporary file: path=%r; [%s] %s" % (json_path, e.__class__.__name__, e)
-                )
-
-        # Must succeed
-        if exit_code:
-            raise RuntimeError(
-                "Failed to run builder function in subprocess: module_path=%r; data=%r" % (module_path, data)
-            )
-
-    return wrapper
-
-
-def subprocess_main(namespace):
-    with open(sys.argv[1]) as json_file:
-        data = json.load(json_file)
-
-    fn = namespace[data["fn"]]
-    fn(*data["args"])
-
 
 # CPU architecture options.
 architectures = ["x86_32", "x86_64", "arm32", "arm64", "rv64", "ppc32", "ppc64", "wasm32"]