package main

import (
	"fmt"
	"os"

	"github.com/spf13/cobra"
)

var rootCmd = &cobra.Command{
	Use:   "tarpoon",
	Short: "Build Docker images",
	Long:  "`docker build && docker push` without the `docker`. Push a tarball to a registry for distribution",
	Run:   rootRun,
}

var (
	baseImage string
	workDir   string
	exec      []string
)

func init() {
	rootCmd.PersistentFlags().StringVarP(&baseImage, "base-image", "b", "scratch", "Base image to append the tar to")
	rootCmd.PersistentFlags().StringVarP(&workDir, "workdir", "w", "/", "Working directory of the new container")
	rootCmd.PersistentFlags().StringSliceVarP(&exec, "exec", "e", []string{"/bin/sh", "-c"}, "What to exec in the newly built container")
}

func main() {
	if err := rootCmd.Execute(); err != nil {
		fmt.Println(err)
		os.Exit(-1)
	}
}

func rootRun(cmd *cobra.Command, args []string) {
	if len(args) < 2 {
		fmt.Println("tarpoon TARFILE DOCKER_PATH")
		os.Exit(1)
	}
	fmt.Printf("** Creating build dir\n")
	dir, err := NewBuildDir()
	defer dir.Close()
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	fmt.Printf("** Build dir is %s\n", dir.dir)
	fmt.Printf("** Loading base image %s\n", baseImage)
	err = dir.LoadBase(baseImage)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	fmt.Printf("** Applying tarball %s\n", args[0])
	err = dir.AddTarLayer(args[0])
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	fmt.Printf("** Preparing image\n")
	err = dir.DumpImageConfig()
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	err = dir.WriteManifest()
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	fmt.Printf("** Pushing image\n")
	err = dir.Push(args[1])
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

}