github.com/thajeztah/cli@v0.0.0-20240223162942-dc6bfac81a8b/cli/command/image/load.go (about) 1 package image 2 3 import ( 4 "context" 5 "io" 6 7 "github.com/docker/cli/cli" 8 "github.com/docker/cli/cli/command" 9 "github.com/docker/cli/cli/command/completion" 10 "github.com/docker/docker/pkg/jsonmessage" 11 "github.com/moby/sys/sequential" 12 "github.com/pkg/errors" 13 "github.com/spf13/cobra" 14 ) 15 16 type loadOptions struct { 17 input string 18 quiet bool 19 } 20 21 // NewLoadCommand creates a new `docker load` command 22 func NewLoadCommand(dockerCli command.Cli) *cobra.Command { 23 var opts loadOptions 24 25 cmd := &cobra.Command{ 26 Use: "load [OPTIONS]", 27 Short: "Load an image from a tar archive or STDIN", 28 Args: cli.NoArgs, 29 RunE: func(cmd *cobra.Command, args []string) error { 30 return runLoad(cmd.Context(), dockerCli, opts) 31 }, 32 Annotations: map[string]string{ 33 "aliases": "docker image load, docker load", 34 }, 35 ValidArgsFunction: completion.NoComplete, 36 } 37 38 flags := cmd.Flags() 39 40 flags.StringVarP(&opts.input, "input", "i", "", "Read from tar archive file, instead of STDIN") 41 flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Suppress the load output") 42 43 return cmd 44 } 45 46 func runLoad(ctx context.Context, dockerCli command.Cli, opts loadOptions) error { 47 var input io.Reader = dockerCli.In() 48 if opts.input != "" { 49 // We use sequential.Open to use sequential file access on Windows, avoiding 50 // depleting the standby list un-necessarily. On Linux, this equates to a regular os.Open. 51 file, err := sequential.Open(opts.input) 52 if err != nil { 53 return err 54 } 55 defer file.Close() 56 input = file 57 } 58 59 // To avoid getting stuck, verify that a tar file is given either in 60 // the input flag or through stdin and if not display an error message and exit. 61 if opts.input == "" && dockerCli.In().IsTerminal() { 62 return errors.Errorf("requested load from stdin, but stdin is empty") 63 } 64 65 if !dockerCli.Out().IsTerminal() { 66 opts.quiet = true 67 } 68 response, err := dockerCli.Client().ImageLoad(ctx, input, opts.quiet) 69 if err != nil { 70 return err 71 } 72 defer response.Body.Close() 73 74 if response.Body != nil && response.JSON { 75 return jsonmessage.DisplayJSONMessagesToStream(response.Body, dockerCli.Out(), nil) 76 } 77 78 _, err = io.Copy(dockerCli.Out(), response.Body) 79 return err 80 }