all: update chmod/chdir usages

cmd/tools/fast/fast.v

@@ -16,7 +16,7 @@ const vdir = @VEXEROOT
 fn main() {
 	dump(fast_dir)
 	dump(vdir)
-	os.chdir(fast_dir)
+	os.chdir(fast_dir) ?
 	if !os.exists('$vdir/v') && !os.is_dir('$vdir/vlib') {
 		println('fast.html generator needs to be located in `v/cmd/tools/fast`')
 	}
@@ -49,7 +49,7 @@ fn main() {
 	// println('Checking out ${commit}...')
 	// exec('git checkout $commit')
 	println('  Building vprod...')
-	os.chdir(vdir)
+	os.chdir(vdir) ?
 	if os.args.contains('-noprod') {
 		exec('./v -o vprod cmd/v') // for faster debugging
 	} else {
@@ -82,7 +82,7 @@ fn main() {
 	commit_date := exec('git log -n1 --pretty="format:%at" $commit')
 	date := time.unix(commit_date.int())
 	//
-	os.chdir(fast_dir)
+	os.chdir(fast_dir) ?
 	mut out := os.create('table.html') ?
 	// Place the new row on top
 	html_message := message.replace_each(['<', '&lt;', '>', '&gt;'])
@@ -120,7 +120,7 @@ fn main() {
 	// Upload the result to github pages
 	if os.args.contains('-upload') {
 		println('uploading...')
-		os.chdir('website')
+		os.chdir('website') ?
 		os.execute_or_exit('git checkout gh-pages')
 		os.cp('../index.html', 'index.html') ?
 		os.rm('../index.html') ?

cmd/tools/vdoctor.v

@@ -102,7 +102,7 @@ fn (mut a App) collect_info() {
 	vmodules := os.vmodules_dir()
 	vexe := os.getenv('VEXE')
 	vroot := os.dir(vexe)
-	os.chdir(vroot)
+	os.chdir(vroot) or {}
 	a.line('getwd', getwd)
 	a.line('vmodules', vmodules)
 	a.line('vroot', vroot)

vlib/io/util/util_test.v

@@ -13,12 +13,12 @@ fn testsuite_begin() {
 	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	os.mkdir_all(tfolder) or { panic(err) }
-	os.chdir(tfolder)
+	os.chdir(tfolder) or {}
 	assert os.is_dir(tfolder)
 }
 
 fn testsuite_end() {
-	os.chdir(os.wd_at_startup)
+	os.chdir(os.wd_at_startup) or {}
 	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	// eprintln('testsuite_end  , tfolder = $tfolder removed.')

vlib/os/file_test.v

@@ -49,12 +49,12 @@ fn testsuite_begin() ? {
 	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	os.mkdir_all(tfolder) ?
-	os.chdir(tfolder)
+	os.chdir(tfolder) ?
 	assert os.is_dir(tfolder)
 }
 
 fn testsuite_end() ? {
-	os.chdir(os.wd_at_startup)
+	os.chdir(os.wd_at_startup) ?
 	os.rmdir_all(tfolder) ?
 	assert !os.is_dir(tfolder)
 }

vlib/os/glob_test.v

@@ -1,7 +1,7 @@
 import os
 
 fn deep_glob() ? {
-	os.chdir(@VMODROOT)
+	os.chdir(@VMODROOT) ?
 	matches := os.glob('vlib/v/*/*.v') or { panic(err) }
 	assert matches.len > 10
 	assert 'vlib/v/ast/ast.v' in matches
@@ -16,7 +16,7 @@ fn deep_glob() ? {
 }
 
 fn redeep_glob() ? {
-	os.chdir(@VMODROOT)
+	os.chdir(@VMODROOT) ?
 	matches := os.glob('vlib/v/**/*.v') or { panic(err) }
 	assert matches.len > 10
 	assert 'vlib/v/ast/ast.v' in matches
@@ -39,7 +39,7 @@ fn test_glob_can_find_v_files_3_levels_deep() ? {
 }
 
 fn test_glob_can_find_files_in_current_folder() ? {
-	os.chdir(@VMODROOT)
+	os.chdir(@VMODROOT) ?
 	matches := os.glob('*') ?
 	assert '.gitignore' in matches
 	assert 'make.bat' in matches
@@ -53,7 +53,7 @@ fn test_glob_can_find_files_in_current_folder() ? {
 }
 
 fn test_glob_can_be_used_with_multiple_patterns() ? {
-	os.chdir(@VMODROOT)
+	os.chdir(@VMODROOT) ?
 	matches := os.glob('*', 'cmd/tools/*') ?
 	assert 'README.md' in matches
 	assert 'Makefile' in matches
@@ -66,7 +66,7 @@ fn test_glob_can_be_used_with_multiple_patterns() ? {
 }
 
 fn test_glob_star() ? {
-	os.chdir(@VMODROOT)
+	os.chdir(@VMODROOT) ?
 	matches := os.glob('*ake*') ?
 	assert 'Makefile' in matches
 	assert 'make.bat' in matches

vlib/os/inode_test.v

@@ -12,12 +12,12 @@ fn testsuite_begin() {
 	rmdir_all(os.tfolder) or {}
 	assert !is_dir(os.tfolder)
 	mkdir_all(os.tfolder) or { panic(err) }
-	chdir(os.tfolder)
+	chdir(os.tfolder) or {}
 	assert is_dir(os.tfolder)
 }
 
 fn testsuite_end() {
-	chdir(wd_at_startup)
+	chdir(wd_at_startup) or {}
 	rmdir_all(os.tfolder) or { panic(err) }
 	assert !is_dir(os.tfolder)
 }

vlib/os/os_test.v

@@ -478,11 +478,11 @@ fn test_is_executable_writable_readable() {
 	}
 	f.close()
 	$if !windows {
-		os.chmod(file_name, 0o600) // mark as readable && writable, but NOT executable
+		os.chmod(file_name, 0o600) or {} // mark as readable && writable, but NOT executable
 		assert os.is_writable(file_name)
 		assert os.is_readable(file_name)
 		assert !os.is_executable(file_name)
-		os.chmod(file_name, 0o700) // mark as executable too
+		os.chmod(file_name, 0o700) or {} // mark as executable too
 		assert os.is_executable(file_name)
 	} $else {
 		assert os.is_writable(file_name)
@@ -640,7 +640,7 @@ fn test_posix_set_bit() {
 	} $else {
 		fpath := '/tmp/permtest'
 		os.create(fpath) or { panic("Couldn't create file") }
-		os.chmod(fpath, 0o0777)
+		os.chmod(fpath, 0o0777) or { panic(err) }
 		c_fpath := &char(fpath.str)
 		mut s := C.stat{}
 		unsafe {