all: more chdir/chmod fixes

vlib/builtin/linux_bare/old/syscallwrapper_test.v

@@ -12,7 +12,7 @@ fn test_syscallwrappers() {
 				dot_checks := vdir + '/.checks'
 				assert os.is_dir(dot_checks)
 
-				os.chdir(dot_checks)
+				os.chdir(dot_checks) or {}
 				checks_v := 'checks.v'
 				assert os.exists(checks_v)
 				rc := os.execute_or_exit('v run $checks_v')

vlib/os/os.c.v

@@ -886,7 +886,7 @@ pub fn flush() {
 
 // chmod change file access attributes of `path` to `mode`.
 // Octals like `0o600` can be used.
-pub fn chmod(path string, mode int)? {
+pub fn chmod(path string, mode int) ? {
 	if C.chmod(&char(path.str), mode) != 0 {
 		return error_with_code('chmod failed: ' + posix_get_error_msg(C.errno), C.errno)
 	}

vlib/v/compiler_errors_test.v

@@ -9,7 +9,7 @@ import runtime
 import benchmark
 
 const skip_files = [
-	'non_existing.vv' /* minimize commit diff churn, do not remove */,
+	'non_existing.vv', // minimize commit diff churn, do not remove
 ]
 
 const skip_on_ubuntu_musl = [
@@ -51,7 +51,7 @@ mut:
 fn test_all() {
 	vexe := os.getenv('VEXE')
 	vroot := os.dir(vexe)
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	checker_dir := 'vlib/v/checker/tests'
 	parser_dir := 'vlib/v/parser/tests'
 	scanner_dir := 'vlib/v/scanner/tests'

vlib/v/doc/doc_private_fn_test.v

@@ -3,7 +3,7 @@ module doc
 import os
 
 fn testsuite_begin() {
-	os.chdir(@VMODROOT)
+	os.chdir(@VMODROOT) or {}
 	eprintln('>> @VMODROOT: ' + @VMODROOT)
 }
 

vlib/v/fmt/fmt_keep_test.v

@@ -29,7 +29,7 @@ fn test_fmt() {
 		exit(error_missing_vexe)
 	}
 	vroot := os.dir(vexe)
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	basepath := os.join_path(vroot, '')
 	tmpfolder := os.temp_dir()
 	diff_cmd := diff.find_working_diff_command() or { '' }

vlib/v/fmt/fmt_vlib_test.v

@@ -33,7 +33,7 @@ fn test_vlib_fmt() {
 	tmpfolder := os.temp_dir()
 	diff_cmd := diff.find_working_diff_command() or { '' }
 	mut fmt_bench := benchmark.new_benchmark()
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	input_files := os.walk_ext('vlib/v/', '.v').filter(!it.contains('/tests/'))
 	fmt_bench.set_total_expected_steps(input_files.len)
 	for istep, ipath in input_files {

vlib/v/gen/js/jsgen_test.v

@@ -17,7 +17,7 @@ const there_is_grep_available = is_grep_working()
 
 fn test_example_compilation() {
 	vexe := os.getenv('VEXE')
-	os.chdir(os.dir(vexe))
+	os.chdir(os.dir(vexe)) or {}
 	os.mkdir_all(output_dir) or { panic(err) }
 	files := find_test_files()
 	for file in files {

vlib/v/gen/js/program_test.v

@@ -37,7 +37,7 @@ fn test_node_exists() {
 
 fn test_running_programs_compiled_with_the_js_backend() ? {
 	os.setenv('VCOLORS', 'never', true)
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	test_dir := 'vlib/v/gen/js/tests/testdata'
 	main_files := get_main_files_in_dir(test_dir)
 	fails := check_path(test_dir, main_files) ?

vlib/v/gen/native/tests/native_test.v

@@ -22,7 +22,7 @@ fn test_native() {
 	//
 	wrkdir := os.join_path(os.temp_dir(), 'vtests', 'native')
 	os.mkdir_all(wrkdir) or { panic(err) }
-	os.chdir(wrkdir)
+	os.chdir(wrkdir) or {}
 	tests := files.filter(it.ends_with('.vv'))
 	if tests.len == 0 {
 		println('no native tests found')

vlib/v/tests/multiple_paths_in_vmodules/vmodules_overrides_test.v

@@ -16,7 +16,7 @@ fn test_vexe_is_set() {
 }
 
 fn test_compiling_without_vmodules_fails() {
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	os.setenv('VMODULES', '', true)
 	res := os.execute('"$vexe" run "$mainvv"')
 	assert res.exit_code == 1
@@ -24,7 +24,7 @@ fn test_compiling_without_vmodules_fails() {
 }
 
 fn test_compiling_with_vmodules_works() {
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	vmpaths := ['path1', 'path2', 'path3'].map(os.join_path(basepath, it))
 	os.setenv('VMODULES', vmpaths.join(os.path_delimiter), true)
 	res := os.execute('"$vexe" run "$mainvv"')

vlib/v/tests/run_project_folders_test.v

@@ -11,7 +11,7 @@ fn test_vexe_exists() {
 }
 
 fn test_v_profile_works() ? {
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	folders_root := os.join_path(vroot, 'vlib/v/tests/run_project_folders')
 	folder_names := os.ls(folders_root) ?
 	mut folder_paths := []string{}

vlib/v/tests/valgrind/valgrind_test.v

@@ -57,7 +57,7 @@ fn test_all() {
 	//
 	wrkdir := os.join_path(os.temp_dir(), 'vtests', 'valgrind')
 	os.mkdir_all(wrkdir) or { panic(err) }
-	os.chdir(wrkdir)
+	os.chdir(wrkdir) or {}
 	//
 	only_ordinary_v_files := files.filter(it.ends_with('.v') && !it.ends_with('_test.v'))
 	tests := vtest.filter_vtest_only(only_ordinary_v_files, basepath: valgrind_test_path)