Plumb through Dart entrypoint arguments on the Linux embedder (flutter-team-archive#21933)

Author: George Wright

shell/platform/linux/fl_dart_project.cc

@@ -19,6 +19,7 @@ struct _FlDartProject {
   gchar* aot_library_path;
   gchar* assets_path;
   gchar* icu_data_path;
+  gchar** dart_entrypoint_args;
 };
 
 G_DEFINE_TYPE(FlDartProject, fl_dart_project, G_TYPE_OBJECT)
@@ -42,6 +43,7 @@ static void fl_dart_project_dispose(GObject* object) {
   g_clear_pointer(&self->aot_library_path, g_free);
   g_clear_pointer(&self->assets_path, g_free);
   g_clear_pointer(&self->icu_data_path, g_free);
+  g_clear_pointer(&self->dart_entrypoint_args, g_strfreev);
 
   G_OBJECT_CLASS(fl_dart_project_parent_class)->dispose(object);
 }
@@ -98,6 +100,20 @@ G_MODULE_EXPORT const gchar* fl_dart_project_get_icu_data_path(
   return self->icu_data_path;
 }
 
+G_MODULE_EXPORT gchar** fl_dart_project_get_dart_entrypoint_arguments(
+    FlDartProject* self) {
+  g_return_val_if_fail(FL_IS_DART_PROJECT(self), nullptr);
+  return self->dart_entrypoint_args;
+}
+
+G_MODULE_EXPORT void fl_dart_project_set_dart_entrypoint_arguments(
+    FlDartProject* self,
+    char** argv) {
+  g_return_if_fail(FL_IS_DART_PROJECT(self));
+  g_clear_pointer(&self->dart_entrypoint_args, g_strfreev);
+  self->dart_entrypoint_args = g_strdupv(argv);
+}
+
 GPtrArray* fl_dart_project_get_switches(FlDartProject* self) {
   GPtrArray* switches = g_ptr_array_new_with_free_func(g_free);
   std::vector<std::string> env_switches = flutter::GetSwitchesFromEnvironment();

shell/platform/linux/fl_engine.cc

@@ -381,6 +381,9 @@ gboolean fl_engine_start(FlEngine* self, GError** error) {
   // so that all switches are used.
   g_ptr_array_insert(command_line_args, 0, g_strdup("flutter"));
 
+  gchar** dart_entrypoint_args =
+      fl_dart_project_get_dart_entrypoint_arguments(self->project);
+
   FlutterProjectArgs args = {};
   args.struct_size = sizeof(FlutterProjectArgs);
   args.assets_path = fl_dart_project_get_assets_path(self->project);
@@ -391,6 +394,9 @@ gboolean fl_engine_start(FlEngine* self, GError** error) {
   args.platform_message_callback = fl_engine_platform_message_cb;
   args.custom_task_runners = &custom_task_runners;
   args.shutdown_dart_vm_when_done = true;
+  args.dart_entrypoint_argc = g_strv_length(dart_entrypoint_args);
+  args.dart_entrypoint_argv =
+      reinterpret_cast<const char* const*>(dart_entrypoint_args);
 
   if (FlutterEngineRunsAOTCompiledDartCode()) {
     FlutterEngineAOTDataSource source = {};

shell/platform/linux/public/flutter_linux/fl_dart_project.h

@@ -96,6 +96,30 @@ const gchar* fl_dart_project_get_assets_path(FlDartProject* project);
  */
 const gchar* fl_dart_project_get_icu_data_path(FlDartProject* project);
 
+/**
+ * fl_dart_project_set_dart_entrypoint_arguments:
+ * @project: an #FlDartProject.
+ * @argv: a pointer to a NULL-terminated array of C strings containing the
+ * command line arguments.
+ *
+ * Sets the command line arguments to be passed through to the Dart
+ * entrypoint function.
+ */
+void fl_dart_project_set_dart_entrypoint_arguments(FlDartProject* project,
+                                                   char** argv);
+
+/**
+ * fl_dart_project_get_dart_entrypoint_arguments:
+ * @project: an #FlDartProject.
+ *
+ * Gets the command line arguments to be passed through to the Dart entrypoint
+ * function.
+ *
+ * Returns: a NULL-terminated array of strings containing the command line
+ * arguments to be passed to the Dart entrypoint.
+ */
+gchar** fl_dart_project_get_dart_entrypoint_arguments(FlDartProject* project);
+
 G_END_DECLS
 
 #endif  // FLUTTER_SHELL_PLATFORM_LINUX_FL_DART_PROJECT_H_