Create Command Line Tools

使用elixir创建命令行工具，是 http://www.elixirdose.com/post/create_command_line_tools 这个链接的正确完整版
使用mix命令行工具创建新的项目

[root@study elixir]# mix new awesome_cli[root@study elixir]# cd awesome_cli/

修改lib/awesome_cli.ex，内容如下

[root@study awesome_cli]# cat lib/awesome_cli.ex   defmodule AwesomeCli do    def main(args) do        IO.puts "Hello, mirahs!"    endend

修改mix.exs，增加escript定义，内容如下

[root@study awesome_cli]# cat mix.exs | grep -v "^.*#"defmodule AwesomeCli.Mixfile do  use Mix.Project  def project do    [app: :awesome_cli,     version: "0.0.1",     elixir: "~> 1.1-rc",     build_embedded: Mix.env == :prod,     start_permanent: Mix.env == :prod,     escript: escript,     deps: deps]  end  def escript do    [main_module: AwesomeCli]  end  def application do    [applications: [:logger]]  end  defp deps do    []  endend

编译后会在当前目录生成awesome_cli可执行文件，运行

[root@study awesome_cli]# mix escript.build[root@study awesome_cli]# ./awesome_cli Hello, mirahs!

下面是完整版本

[root@study awesome_cli]# cat lib/awesome_cli.ex defmodule AwesomeCli do    def main(args) do       args |> parse_args |> do_process    end    def parse_args(args) do        options = OptionParser.parse(args)        case options do            {[name: name], _, _} -> [name]            {[help: true], _, _} -> :help            _ -> :help        end    end    def do_process([name]) do        IO.puts "Hello, #{name}! You're awesome!!"    end    def do_process(:help) do        IO.puts """            Usage:            ./awesome_clie --name [your name]            Options:            --help Show this help message.            Description:            Prints out an awesome message.        """    endend

重新编译并运行

[root@study awesome_cli]# mix escript.build[root@study awesome_cli]# ./awesome_cli --name mirahsHello, mirahs! You're awesome!![root@study awesome_cli]# ./awesome_cli --help    Usage:    ./awesome_clie --name [your name]    Options:    --help Show this help message.    Description:    Prints out an awesome message.

项目完整文件

[root@study awesome_cli]# cd ..[root@study elixir]# tree awesome_cli/awesome_cli/├── awesome_cli├── _build│   └── dev│       └── lib│           └── awesome_cli│               └── ebin│                   ├── awesome_cli.app│                   └── Elixir.AwesomeCli.beam├── config│   └── config.exs├── lib│   └── awesome_cli.ex├── mix.exs├── README.md└── test    ├── awesome_cli_test.exs    └── test_helper.exs8 directories, 9 files