From e6e1011e478f529eadbfacac19977a7199eef247 Mon Sep 17 00:00:00 2001
From: Lukas Neubert <lukas.neubert3@gmail.com>
Date: Wed, 19 Aug 2020 14:38:45 +0200
Subject: [PATCH] examples: cli: more readable and informative program output
 (#6168)

---
 examples/cli.v | 70 ++++++++++++++++++++++++++++----------------------
 1 file changed, 39 insertions(+), 31 deletions(-)

diff --git a/examples/cli.v b/examples/cli.v
index 1d61c9df9a..f69cf0c0b8 100644
--- a/examples/cli.v
+++ b/examples/cli.v
@@ -5,57 +5,65 @@ import os
 
 fn main() {
 	mut cmd := cli.Command{
-		name: 'cli',
-		description: 'An example of the cli library',
-		version: '1.0.0',
+		name: 'cli'
+		description: 'An example of the cli library.'
+		version: '1.0.0'
 	}
-
 	mut greet_cmd := cli.Command{
-		name: 'greet',
-		description: 'Prints greeting in different languages',
-		pre_execute: greet_pre_func,
-		execute: greet_func,
-		post_execute: greet_post_func,
+		name: 'greet'
+		description: 'Prints greeting in different languages.'
+		pre_execute: greet_pre_func
+		execute: greet_func
+		post_execute: greet_post_func
 	}
 	greet_cmd.add_flag(cli.Flag{
-		flag: .string,
-		required: true,
-		name: 'language',
-		abbrev: 'l',
-		description: 'Language of the message'
+		flag: .string
+		required: true
+		name: 'language'
+		abbrev: 'l'
+		description: 'Language of the message.'
 	})
 	greet_cmd.add_flag(cli.Flag{
-		flag: .int,
-		name: 'times',
-		value: '3',
-		description: 'Number of times the message gets printed'
+		flag: .int
+		name: 'times'
+		value: '3'
+		description: 'Number of times the message gets printed.'
 	})
-
 	cmd.add_command(greet_cmd)
 	cmd.parse(os.args)
 }
 
 fn greet_func(cmd cli.Command) {
-	language := cmd.flags.get_string('language') or { panic('failed to get \'language\' flag: $err') }
-	times := cmd.flags.get_int('times') or { panic('failed to get \'times\' flag: $err') }
-
-	for _ in 0..times {
+	language := cmd.flags.get_string('language') or {
+		panic("Failed to get \'language\' flag: $err")
+	}
+	times := cmd.flags.get_int('times') or {
+		panic("Failed to get \'times\' flag: $err")
+	}
+	for _ in 0 .. times {
 		match language {
-			'english' { println('Hello World') }
-			'german' { println('Hallo Welt') }
-			'dutch' { println('Hallo Wereld') }
-			else { 
-				println('unsupported language')
-				break 
+			'english' {
+				println('Hello World')
+			}
+			'german' {
+				println('Hallo Welt')
+			}
+			'dutch' {
+				println('Hallo Wereld')
+			}
+			else {
+				println('Unsupported language')
+				println('Supported are `englisch`, `german` and `dutch`.')
+				break
 			}
 		}
 	}
 }
 
 fn greet_pre_func(cmd cli.Command) {
-	println('This is a function running before the main function')
+	println('This is a function running before the main function.\n')
 }
 
 fn greet_post_func(cmd cli.Command) {
-	println('This is a function running after the main function')
+	println('\nThis is a function running after the main function.')
 }