v/cmd/tools/vcreate.v

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module main
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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
//
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// This module follows a similar convention to Rust: `init` makes the
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// structure of the program in the _current_ directory, while `new`
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// makes the program structure in a _sub_ directory. Besides that, the
// functionality is essentially the same.
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import os
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struct Create {
mut:
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name string
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description string
}
fn cerror(e string) {
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eprintln('\nerror: $e')
}
fn vmod_content(name string, desc string) string {
return [
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'Module {',
" name: '$name'",
" description: '$desc'",
" version: '0.0.0'",
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' dependencies: []',
'}',
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].join('\n')
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}
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fn main_content() string {
return [
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'module main\n',
'fn main() {',
" println('Hello World!')",
'}',
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].join('\n')
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}
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fn gen_gitignore(name string) string {
return [
'# Binaries for programs and plugins',
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'main',
'$name',
'*.exe',
'*.exe~',
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'*.so',
'*.dylib',
'*.dll',
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].join('\n')
}
fn (c &Create) write_vmod(new bool) {
vmod_path := if new { '$c.name/v.mod' } else { 'v.mod' }
mut vmod := os.create(vmod_path) or {
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cerror(err)
exit(1)
}
vmod.write_str(vmod_content(c.name, c.description))
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vmod.close()
}
fn (c &Create) write_main(new bool) {
if !new && (os.exists('${c.name}.v') || os.exists('src/${c.name}.v')) {
return
}
main_path := if new { '$c.name/${c.name}.v' } else { '${c.name}.v' }
mut main := os.create(main_path) or {
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cerror(err)
exit(2)
}
main.write_str(main_content())
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main.close()
}
fn (c &Create) create_git_repo(dir string) {
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// Create Git Repo and .gitignore file
if !os.is_dir('$dir/.git') {
os.exec('git init $dir') or {
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cerror('Unable to create git repo')
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exit(4)
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}
if !os.exists('$dir/.gitignore') {
mut fl := os.create('$dir/.gitignore') or {
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// We don't really need a .gitignore, it's just a nice-to-have
return
}
fl.write_str(gen_gitignore(c.name))
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fl.close()
}
}
}
fn create() {
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mut c := Create{}
c.name = os.input('Input your project name: ')
if c.name == '' {
cerror('project name cannot be empty')
exit(1)
}
if c.name.contains('-') {
cerror('"$c.name" should not contain hyphens')
exit(1)
}
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if os.is_dir(c.name) {
cerror('$c.name folder already exists')
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exit(3)
}
c.description = os.input('Input your project description: ')
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println('Initialising ...')
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os.mkdir(c.name) or {
panic(err)
}
c.write_vmod(true)
c.write_main(true)
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c.create_git_repo(c.name)
}
fn init_project() {
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if os.exists('v.mod') {
cerror('`v init` cannot be run on existing v modules')
exit(3)
}
mut c := Create{}
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c.name = os.file_name(os.getwd())
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c.description = ''
c.write_vmod(false)
c.write_main(false)
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c.create_git_repo('')
println("Change your module's description in `v.mod`")
}
fn main() {
if os.args[1] == 'new' {
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create()
} else if os.args[1] == 'init' {
init_project()
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} else {
cerror('Unknown command: ${os.args[1]}')
exit(1)
}
println('Complete!')
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}