Practice

  • 透過應用程式可以產生姓名，並建立屬於自己的字典，讓取名可以有自定義的方向，還可避開不喜歡的字。

使用dep

  • 使用 dep 初始化一個 CLI 專案。

  • $ brew install dep

  • 找現有程式參考。 Dapper 是個不錯且夠簡單的 CLI 專案，其 main.go 用了 [urfave/cli][] （有改名過）框架。

  • 先下載 cli 套件原始碼：
    $ go get github.com/urfave/cli

  • 建立主要檔案 main.go

1
2
3
4
5
6
7
8
9
10
11
12
package main

import (
	"os"
	"github.com/urfave/cli"
)

func main() {
	app := cli.NewApp()
	app.Name = `Namer`
	app.Run(os.Args)
}

  • 切記，須將project建立在 $HOME/go/src/myproject

  • 關於 dep 的應用

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
$ dep
dep is a tool for managing dependencies for Go projects

Usage: dep <command>

Commands:

  init     Initialize a new project with manifest and lock files
  status   Report the status of the project's dependencies
  ensure   Ensure a dependency is safely vendored in the project
  prune    Prune the vendor tree of unused packages
  version  Show the dep version information

Examples:
  dep init                               set up a new project
  dep ensure                             install the project's dependencies
  dep ensure -update                     update the locked versions of all dependencies
  dep ensure -add github.com/pkg/errors  add a dependency to the project

Use "dep help [command]" for more information about a command.

  • 需至$HOME/go/src/myproject 進行dep init
1
2
3
$ dep init
  Using ^1.20.0 as constraint for direct dep github.com/urfave/cli
  Locking in v1.20.0 (cfb3883) for direct dep github.com/urfave/cli
  • 將程式碼裡的依賴都找出，將其下載到 vendor 目錄。
  • vendor 須不須 commit ，可以參考官方文件，是隨意，同時也很負責的說明了優缺點。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
$ go run main.go
NAME:
   Namer - A new cli application

USAGE:
   main [global options] command [command options] [arguments...]

VERSION:
   0.0.0

COMMANDS:
     help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --help, -h     show help
   --version, -v  print the version