Generate default.db-options file if it not exist, nervosnetwork#4671

ckb-bin/src/subcommand/run.rs

@@ -6,12 +6,27 @@ use ckb_async_runtime::{new_global_runtime, Handle};
 use ckb_build_info::Version;
 use ckb_launcher::Launcher;
 use ckb_logger::info;
+use ckb_resource::{Resource, TemplateContext};
 
 use ckb_stop_handler::{broadcast_exit_signals, wait_all_ckb_services_exit};
 
 use ckb_types::core::cell::setup_system_cell_cache;
 
 pub fn run(args: RunArgs, version: Version, async_handle: Handle) -> Result<(), ExitCode> {
+    {
+        // check is there a default.db-options file exist in args.config.root_dir, if not, create one.
+        let db_options_path = args.config.root_dir.join("default.db-options");
+
+        // Check if the default.db-options file exists, if not, create one.
+        if !db_options_path.exists() {
+            // context_for_db_options is used to generate a default default.db-options file.
+            let context_for_db_options = TemplateContext::new("", Default::default());
+
+            // Attempt to export the bundled DB options to the specified path.
+            Resource::bundled_db_options()
+                .export(&context_for_db_options, &args.config.root_dir)?;
+        }
+    }
     deadlock_detection();
 
     let rpc_threads_num = calc_rpc_threads_num(&args);