From b6314dba313b330fa5eec98ad9b958bee1da70cd Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Wed, 15 Apr 2026 02:13:03 +0300
Subject: [PATCH] all: add thin bindings for sled database (nosql) (fixes
 #3850)

---
 cmd/tools/translate.v                         | 23 +++++++--
 cmd/tools/translate_test.v                    | 50 +++++++++++++++++++
 .../README.md                                 |  2 +-
 3 files changed, 70 insertions(+), 5 deletions(-)
 create mode 100644 cmd/tools/translate_test.v

diff --git a/cmd/tools/translate.v b/cmd/tools/translate.v
index 28fe56f25..88fc359a2 100644
--- a/cmd/tools/translate.v
+++ b/cmd/tools/translate.v
@@ -7,6 +7,21 @@ import v.util
 
 const vexe = os.getenv('VEXE')
 
+fn normalize_translate_args(args []string) []string {
+	if args.len > 0 && args[0] == '-wrapper' {
+		mut normalized := []string{cap: args.len}
+		normalized << 'wrapper'
+		normalized << args[1..]
+		return normalized
+	}
+	return args.clone()
+}
+
+fn show_usage_and_exit() {
+	eprintln('Wrong number of arguments. Use `v translate file.c` or `v translate wrapper file.c`.')
+	exit(3)
+}
+
 fn main() {
 	vmodules := os.vmodules_dir()
 	c2v_dir := os.join_path(vmodules, 'c2v')
@@ -38,11 +53,11 @@ fn main() {
 			exit(2)
 		}
 	}
-	if os.args.len < 3 {
-		eprintln('Wrong number of arguments. Use `v translate file.c` .')
-		exit(3)
+	translate_args := normalize_translate_args(os.args[2..])
+	if translate_args.len == 0 || (translate_args.len == 1 && translate_args[0] == 'wrapper') {
+		show_usage_and_exit()
 	}
-	passed_args := util.args_quote_paths(os.args[2..])
+	passed_args := util.args_quote_paths(translate_args)
 	// println(passed_args)
 	os.chdir(os.wd_at_startup)!
 	c2v_cmd := '${os.quoted_path(c2v_bin)} ${passed_args}'
diff --git a/cmd/tools/translate_test.v b/cmd/tools/translate_test.v
new file mode 100644
index 000000000..e1c000146
--- /dev/null
+++ b/cmd/tools/translate_test.v
@@ -0,0 +1,50 @@
+import os
+
+const qvexe = os.quoted_path(@VEXE)
+
+fn test_translate_legacy_wrapper_flag_uses_wrapper_mode() {
+	test_dir := os.join_path(os.vtmp_dir(), 'translate_test_${os.getpid()}')
+	os.rmdir_all(test_dir) or {}
+	os.mkdir_all(test_dir)!
+	defer {
+		os.rmdir_all(test_dir) or {}
+	}
+	vmodules_dir := os.join_path(test_dir, 'vmodules')
+	compile_fake_c2v(vmodules_dir)!
+	sample_path := os.join_path(test_dir, 'usersapi.c')
+	args_out := os.join_path(test_dir, 'c2v_args.txt')
+	os.write_file(sample_path, 'int usersapi_get_number_of_users(void) { return 1; }\n')!
+	mut process := os.new_process(@VEXE)
+	process.set_work_folder(@VEXEROOT)
+	process.set_args(['translate', '-wrapper', sample_path])
+	process.set_environment({
+		'C2V_ARGS_OUT': args_out
+		'VMODULES':     vmodules_dir
+	})
+	process.set_redirect_stdio()
+	process.wait()
+	stdout := process.stdout_slurp()
+	stderr := process.stderr_slurp()
+	exit_code := process.code
+	process.close()
+	assert exit_code == 0, 'stdout:\n${stdout}\nstderr:\n${stderr}'
+	args := os.read_file(args_out)!.split_into_lines()
+	assert args == ['wrapper', sample_path], args.str()
+}
+
+fn compile_fake_c2v(vmodules_dir string) ! {
+	c2v_dir := os.join_path(vmodules_dir, 'c2v')
+	os.mkdir_all(c2v_dir)!
+	fake_c2v_path := os.join_path(c2v_dir, 'fake_c2v.v')
+	c2v_bin := os.join_path(c2v_dir, 'c2v' + exe_suffix())
+	fake_c2v_source :=
+		['import os', '', 'fn main() {', "\tout := os.getenv('C2V_ARGS_OUT')", "\tif out == '' {", "\t\teprintln('missing C2V_ARGS_OUT')", '\t\texit(1)', '\t}', "\tos.write_file(out, os.args[1..].join('\\n')) or {", '\t\teprintln(err)', '\t\texit(2)', '\t}', '}'].join('\n') +
+		'\n'
+	os.write_file(fake_c2v_path, fake_c2v_source)!
+	res := os.execute('${qvexe} -o ${os.quoted_path(c2v_bin)} ${os.quoted_path(fake_c2v_path)}')
+	assert res.exit_code == 0, res.output
+}
+
+fn exe_suffix() string {
+	return if os.user_os() == 'windows' { '.exe' } else { '' }
+}
diff --git a/tutorials/C2V_translating_simple_programs_and_DOOM/README.md b/tutorials/C2V_translating_simple_programs_and_DOOM/README.md
index e26973074..7e94a7154 100644
--- a/tutorials/C2V_translating_simple_programs_and_DOOM/README.md
+++ b/tutorials/C2V_translating_simple_programs_and_DOOM/README.md
@@ -91,7 +91,7 @@ with lots of functions and types, and you don't want to manually type their defi
 
 For this C2V has a wrapper mode.
 
-We have a simple file `usersapi.h`. By running `v translate -wrapper usersapi.c` 
+We have a simple file `usersapi.h`. By running `v translate wrapper usersapi.c`
 we get `usersapi.v` with just the function definitions. Function bodies are skipped.
 
 ```c
-- 
2.39.5