step011: run command

internal/cmd/init.go

@@ -0,0 +1,6 @@
+package cmd
+
+func init() {
+	initRootCommand()
+	initRunCommand()
+}

internal/cmd/root.go

@@ -0,0 +1,16 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var (
+	rootCommand = &cobra.Command{
+		Use:   "upod",
+		Short: "upod is a simple container runtime implementation",
+	}
+)
+
+func initRootCommand() {
+
+}

internal/cmd/run.go

@@ -0,0 +1,44 @@
+package cmd
+
+import (
+	"errors"
+	"os"
+	"upod/internal/container"
+	"upod/internal/log"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	runCommand = &cobra.Command{
+		Use:   "run",
+		Short: "upod run [OPTIONS] IMAGE [COMMAND] [ARG...]",
+		RunE: func(ctx *cobra.Command, args []string) error {
+			var (
+				err error
+			)
+
+			log.Debug("runCommand: args=%v", args)
+
+			if len(args) == 0 {
+				return errors.New("upod run requires at least 1 argument")
+			}
+
+			cmd := container.NewParentProcess(true, args[0])
+
+			if err = cmd.Start(); err != nil {
+				return err
+			}
+
+			cmd.Wait()
+
+			os.Exit(0)
+
+			return nil
+		},
+	}
+)
+
+func initRunCommand() {
+	rootCommand.AddCommand(runCommand)
+}

internal/cmd/start.go

@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"context"
+	"os"
+	"upod/internal/container"
+	"upod/internal/log"
+)
+
+func Start(ctx context.Context) error {
+
+	if len(os.Args) >= 3 && os.Args[1] == "init" {
+		log.Debug("cmd.Start: init args=%v", os.Args)
+
+		container.RunContainerInitProcess(os.Args[2], os.Args[2:])
+	}
+
+	return rootCommand.ExecuteContext(ctx)
+}