cli: create project helper

.gitignore

@@ -16,6 +16,8 @@
 /tools/vup.exe
 /tools/vpm
 /tools/vpm.exe
+/tools/vcreate
+/tools/vcreate.exe
 *.exe
 *.o
 .*.c

tools/vcreate.v

@@ -0,0 +1,55 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module main
+
+import (
+	os
+)
+
+struct Create {
+mut:
+	name string
+	description string
+}
+
+fn cerror(e string){
+	eprintln('\nerror: $e')
+}
+
+fn (c Create)write_vmod() {
+	vmod := os.create('${c.name}/v.mod') or { cerror(err) exit(1) }
+	mut vmod_content := []string
+	vmod_content << '#V Project#\n'
+	vmod_content << 'Module {'
+	vmod_content << '	name: \'${c.name}\','
+	vmod_content << '	description: \'${c.description}\','
+	vmod_content << '	dependencies: []'
+	vmod_content << '}'
+	vmod.write(vmod_content.join('\n'))
+}
+
+fn (c Create)write_main() {
+	main := os.create('${c.name}/${c.name}.v') or {	cerror(err) exit(2)	}
+	mut main_content := []string
+	main_content << 'module main\n'
+	main_content << 'fn main() {'
+	main_content << '	println(\'Hello World !\')'
+	main_content << '}'
+	main.write(main_content.join('\n'))
+}
+
+fn main() {
+	mut c := Create{}
+	print('Choose your project name: ')
+	c.name = os.get_line()
+	print('Choose your project description: ')
+	c.description = os.get_line()
+	println('Initialising ...')
+	if (os.is_dir(c.name)) { cerror('folder already exists') exit(3) }
+	os.mkdir(c.name)
+	c.write_vmod()
+	c.write_main()
+	println('Complete !')
+}

v.v

@@ -55,6 +55,10 @@ fn main() {
 		compiler.create_symlink()
 		return
 	}
+	else if 'create' in commands {
+		compiler.launch_tool('vcreate')
+		return
+	}
 	// TODO quit if the v compiler is too old
 	// u := os.file_last_mod_unix('v')
 	// If there's no tmp path with current version yet, the user must be using a pre-built package

vlib/compiler/vhelp.v

@@ -71,6 +71,7 @@ Commands:
   fmt               Run vfmt to format the source code. [wip]
   doc               Run vdoc over the source code and produce documentation.
   translate         Translates C to V. [wip, will be available in V 0.3]
+  create            Create a new v project interactively. Answer the questions, and run it with `v run projectname`
 
 V package management commands:
   search  keywords  Search the https://vpm.vlang.io/ module repository for matching modules and shows their details.