go cobra build 命令行工具为统一编译前后端命令

获取 npm 命令，我们使用 Golang 标准库自带的 exec.LookPath 来查找。如果查找到了，就接着使用 exec.Command 来运行 npm run build，并且将输出 cmd.CombinedOutput，输出到控制台中；如果查找不到，就打印出错误信息。

package main
import "gobrief/cmd"
func main() {
    cmd.Execute()
}

package cmd
import (
    "fmt"
    "github.com/spf13/cobra"
    "os"
)
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
    Use:   "go-brief",
    Short: "go-brief [command]",
    Long:  "Please go-brief run",
    // Uncomment the following line if your bare application
    // has an action associated with it:
    //    Run: func(cmd *cobra.Command, args []string) { },
    Run: func(cmd *cobra.Command, args []string) {
        fmt.Println("this is test run function")
        if len(args) == 0 {
            _ = cmd.Help()
            return
        }
    },
}
// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
    if err := rootCmd.Execute(); err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
}

// 打印前端的命令
var buildFrontendCommand = &cobra.Command{
 Use:   "frontend",
 Short: "使用npm编译前端",
 RunE: func(c *cobra.Command, args []string) error {
  // 获取path路径下的npm命令
  path, err := exec.LookPath("npm")
  if err != nil {
   log.Fatalln("请安装npm在你的PATH路径下")
  }
  // 执行npm run build
  cmd := exec.Command(path, "run", "build")
  // 将输出保存在out中
  out, err := cmd.CombinedOutput()
  if err != nil {
   fmt.Println("=============  前端编译失败 ============")
   fmt.Println(string(out))
   fmt.Println("=============  前端编译失败 ============")
   return err
  }
  // 打印输出
  fmt.Print(string(out))
  fmt.Println("=============  前端编译成功 ============")
  return nil
 },
}

package console
import (
    "github.com/gohade/hade/app/console/command/demo"
    "github.com/gohade/hade/framework"
    "github.com/gohade/hade/framework/cobra"
    "github.com/gohade/hade/framework/command"
)
// RunCommand  初始化根Command并运行
func RunCommand(container framework.Container) error {
    // 根Command
    var rootCmd = &cobra.Command{
        // 定义根命令的关键字
        Use: "hade",
        // 简短介绍
        Short: "hade 命令",
        // 根命令的详细介绍
        Long: "hade 框架提供的命令行工具，使用这个命令行工具能很方便执行框架自带命令，也能很方便编写业务命令",
        // 根命令的执行函数
        RunE: func(cmd *cobra.Command, args []string) error {
            cmd.InitDefaultHelpFlag()
            return cmd.Help()
        },
        // 不需要出现cobra默认的completion子命令
        CompletionOptions: cobra.CompletionOptions{DisableDefaultCmd: true},
    }
    // 为根Command设置服务容器
    rootCmd.SetContainer(container)
    // 绑定框架的命令
    command.AddKernelCommands(rootCmd)
    // 绑定业务的命令
    AddAppCommand(rootCmd)
    // 执行RootCommand
    return rootCmd.Execute()
}
// 绑定业务的命令
func AddAppCommand(rootCmd *cobra.Command) {
    rootCmd.AddCommand(demo.FooCommand)
    // 每秒调用一次Foo命令
    //rootCmd.AddCronCommand("* * * * * *", demo.FooCommand)
    // 启动一个分布式任务调度，调度的服务名称为init_func_for_test，每个节点每5s调用一次Foo命令，抢占到了调度任务的节点将抢占锁持续挂载2s才释放
    //rootCmd.AddDistributedCronCommand("foo_func_for_test", "*/5 * * * * *", demo.FooCommand, 2*time.Second)
}