ci: fix `v build-examples` and `v build-tools`

cmd/tools/check_os_api_parity.v

@@ -42,7 +42,7 @@ fn main() {
 	vexe := pref.vexe_path()
 	vroot := os.dir(vexe)
 	util.set_vroot_folder(vroot)
-	os.chdir(vroot)
+	os.chdir(vroot) ?
 	cmd := diff.find_working_diff_command() or { '' }
 	mut app := App{
 		diff_cmd: cmd

cmd/tools/gen_vc.v

@@ -215,7 +215,7 @@ fn (mut gen_vc GenVC) generate() {
 		}
 	}
 	// cd to gen_vc dir
-	os.chdir(gen_vc.options.work_dir)
+	os.chdir(gen_vc.options.work_dir) or {}
 	// if we are not running with the --serve flag (webhook server)
 	// rather than deleting and re-downloading the repo each time
 	// first check to see if the local v repo is behind master

cmd/tools/modules/scripting/scripting.v

@@ -85,7 +85,10 @@ fn modfn(mname string, fname string) string {
 
 pub fn chdir(path string) {
 	verbose_trace_strong(modfn(@MOD, @FN), 'cd $path')
-	os.chdir(path)
+	os.chdir(path) or {
+		verbose_trace(modfn(@MOD, @FN), '## failed.')
+		return
+	}
 }
 
 pub fn mkdir(path string) ? {

cmd/tools/vbug.v

@@ -22,12 +22,12 @@ fn get_v_build_output(is_verbose bool, is_yes bool, file_path string) string {
 	mut vexe := os.getenv('VEXE')
 	// prepare a V compiler with -g to have better backtraces if possible
 	wd := os.getwd()
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	verbose_flag := if is_verbose { '-v' } else { '' }
 	vdbg_path := $if windows { '$vroot/vdbg.exe' } $else { '$vroot/vdbg' }
 	vdbg_compilation_cmd := '"$vexe" $verbose_flag -g -o "$vdbg_path" cmd/v'
 	vdbg_result := os.execute(vdbg_compilation_cmd)
-	os.chdir(wd)
+	os.chdir(wd) or {}
 	if vdbg_result.exit_code == 0 {
 		vexe = vdbg_path
 	} else {

cmd/tools/vbuild-tools.v

@@ -23,7 +23,7 @@ fn main() {
 	args_string := os.args[1..].join(' ')
 	vexe := os.getenv('VEXE')
 	vroot := os.dir(vexe)
-	os.chdir(vroot)
+	os.chdir(vroot) ?
 	folder := os.join_path('cmd', 'tools')
 	tfolder := os.join_path(vroot, 'cmd', 'tools')
 	main_label := 'Building $folder ...'

cmd/tools/vcreate_test.v

@@ -45,7 +45,7 @@ fn test_v_init() ? {
 	defer {
 		os.rmdir_all(dir) or {}
 	}
-	os.chdir(dir)
+	os.chdir(dir) ?
 
 	init_and_check() ?
 }
@@ -57,7 +57,7 @@ fn test_v_init_in_git_dir() ? {
 	defer {
 		os.rmdir_all(dir) or {}
 	}
-	os.chdir(dir)
+	os.chdir(dir) ?
 	os.execute_or_exit('git init .')
 	init_and_check() ?
 }
@@ -70,7 +70,7 @@ fn test_v_init_no_overwrite_gitignore() ? {
 	defer {
 		os.rmdir_all(dir) or {}
 	}
-	os.chdir(dir)
+	os.chdir(dir) ?
 
 	vexe := @VEXE
 	os.execute_or_exit('$vexe init')

cmd/tools/vpm.v

@@ -333,7 +333,7 @@ fn vpm_update(m []string) {
 	mut errors := 0
 	for name in module_names {
 		final_module_path := valid_final_path_of_existing_module(name) or { continue }
-		os.chdir(final_module_path)
+		os.chdir(final_module_path) or {}
 		println('Updating module "$name"...')
 		verbose_println('  work folder: $final_module_path')
 		vcs := vcs_used_in_dir(final_module_path) or { continue }
@@ -361,7 +361,7 @@ fn get_outdated() ?[]string {
 	mut outdated := []string{}
 	for name in module_names {
 		final_module_path := valid_final_path_of_existing_module(name) or { continue }
-		os.chdir(final_module_path)
+		os.chdir(final_module_path) or {}
 		vcs := vcs_used_in_dir(final_module_path) or { continue }
 		vcs_cmd_steps := supported_vcs_outdated_steps[vcs[0]]
 		mut outputs := []string{}

cmd/tools/vself.v

@@ -11,7 +11,7 @@ fn main() {
 	vexe := pref.vexe_path()
 	vroot := os.dir(vexe)
 	recompilation.must_be_enabled(vroot, 'Please install V from source, to use `v self` .')
-	os.chdir(vroot)
+	os.chdir(vroot) ?
 	os.setenv('VCOLORS', 'always', true)
 	args := os.args[1..].filter(it != 'self')
 	jargs := args.join(' ')

cmd/tools/vtest-all.v

@@ -156,7 +156,7 @@ fn get_all_commands() []Command {
 fn (mut cmd Command) run() {
 	// Changing the current directory is needed for some of the compiler tests,
 	// vlib/v/tests/local_test.v and vlib/v/tests/repl/repl_test.v
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	if cmd.label != '' {
 		println(term.header_left(cmd.label, '*'))
 	}

cmd/tools/vtest-cleancode.v

@@ -64,7 +64,7 @@ fn main() {
 }
 
 fn tsession(vargs string, tool_source string, tool_cmd string, tool_args string, flist []string, slist []string) testing.TestSession {
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	title_message := 'running $tool_cmd over most .v files'
 	testing.eheader(title_message)
 	mut test_session := testing.new_test_session('$vargs $tool_args', false)

cmd/tools/vtracev.v

@@ -6,7 +6,7 @@ import v.pref
 fn main() {
 	vexe := pref.vexe_path()
 	vroot := os.dir(vexe)
-	os.chdir(vroot)
+	os.chdir(vroot) ?
 	os.setenv('VCOLORS', 'always', true)
 	self_idx := os.args.index('tracev')
 	args := os.args[1..self_idx]

examples/dynamic_library_loading/use_test.v

@@ -21,14 +21,14 @@ fn test_vexe() {
 }
 
 fn test_can_compile_library() {
-	os.chdir(cfolder)
+	os.chdir(cfolder) or {}
 	os.rm(library_file_name) or {}
 	v_compile('-d no_backtrace -o library -shared modules/library/library.v')
 	assert os.is_file(library_file_name)
 }
 
 fn test_can_compile_main_program() {
-	os.chdir(cfolder)
+	os.chdir(cfolder) or {}
 	assert os.is_file(library_file_name)
 	result := v_compile('run use.v')
 	// dump(result)
@@ -37,7 +37,7 @@ fn test_can_compile_main_program() {
 }
 
 fn test_can_compile_and_use_library_with_skip_unused() {
-	os.chdir(cfolder)
+	os.chdir(cfolder) or {}
 	os.rm(library_file_name) or {}
 	v_compile('-skip-unused -d no_backtrace -o library -shared modules/library/library.v')
 	assert os.is_file(library_file_name)