vup: support -v

cmd/tools/vup.v

@@ -4,43 +4,51 @@ import os
 import v.pref
 import v.util
 
-fn main() {
+struct App {
+	is_verbose bool
+	vexe       string
+	vroot      string
+}
+
+fn new_app() App {
 	vexe := pref.vexe_path()
-	vroot := os.dir(vexe)
-	os.chdir(vroot)
+	return App{
+		is_verbose: '-v' in os.args
+		vexe: vexe
+		vroot: os.dir(vexe)
+	}
+}
 
+fn main() {
+	app := new_app()
+	os.chdir(app.vroot)
 	println('Updating V...')
-
 	if !os.exists('.git') {
 		// initialize as if it had been cloned
-		git_command('init')
-		git_command('remote add origin https://github.com/vlang/v')
-		git_command('fetch')
-		git_command('reset --hard origin/master')
-		git_command('clean --quiet -xdf --exclude v.exe --exclude cmd/tools/vup.exe')
+		app.git_command('init')
+		app.git_command('remote add origin https://github.com/vlang/v')
+		app.git_command('fetch')
+		app.git_command('reset --hard origin/master')
+		app.git_command('clean --quiet -xdf --exclude v.exe --exclude cmd/tools/vup.exe')
 	} else {
 		// pull latest
-		git_command('pull origin master')
+		app.git_command('pull origin master')
 	}
-
 	v_hash := util.githash(false)
 	current_hash := util.githash(true)
 	// println(v_hash)
 	// println(current_hash)
 	if v_hash == current_hash {
-		show_current_v_version(vexe)
+		app.show_current_v_version()
 		return
 	}
-
 	$if windows {
-		backup('v.exe')
-
+		app.backup('v.exe')
 		make_result := os.exec('make.bat') or {
 			panic(err)
 		}
 		println(make_result.output)
-
-		backup('cmd/tools/vup.exe')
+		app.backup('cmd/tools/vup.exe')
 	} $else {
 		self_result := os.exec('./v self') or {
 			panic(err)
@@ -55,19 +63,18 @@ fn main() {
 			println(make_result.output)
 		}
 	}
-
 	os.exec('v cmd/tools/vup.v') or {
 		panic(err)
 	}
-	show_current_v_version(vexe)
+	app.show_current_v_version()
 }
 
-fn show_current_v_version(vexe string){
+fn (app App) show_current_v_version() {
 	println('Current V version:')
-	os.system('$vexe version')
+	os.system('$app.vexe version')
 }
 
-fn backup(file string) {
+fn (app App) backup(file string) {
 	backup_file := '${file}_old.exe'
 	if os.exists(backup_file) {
 		os.rm(backup_file)
@@ -75,20 +82,20 @@ fn backup(file string) {
 	os.mv(file, backup_file)
 }
 
-fn git_command(command string) {
-	vexe := pref.vexe_path()
-	vroot := os.dir(vexe)
-
+fn (app App) git_command(command string) {
 	git_result := os.exec('git $command') or {
 		panic(err)
 	}
-
 	if git_result.exit_code != 0 {
 		if git_result.output.contains('Permission denied') {
-			eprintln('have no access `$vroot`: Permission denied')
+			eprintln('have no access `$app.vroot`: Permission denied')
 		} else {
 			eprintln(git_result.output)
 		}
 		exit(1)
+	} else {
+		if app.is_verbose {
+			println(git_result.output)
+		}
 	}
 }