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https://github.com/moby/moby.git
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77 lines
2 KiB
Go
77 lines
2 KiB
Go
package image
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import (
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"fmt"
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"io"
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"golang.org/x/net/context"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/pkg/jsonmessage"
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"github.com/docker/docker/pkg/system"
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"github.com/spf13/cobra"
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)
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type loadOptions struct {
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input string
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quiet bool
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}
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// NewLoadCommand creates a new `docker load` command
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func NewLoadCommand(dockerCli *command.DockerCli) *cobra.Command {
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var opts loadOptions
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cmd := &cobra.Command{
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Use: "load [OPTIONS]",
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Short: "Load an image from a tar archive or STDIN",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runLoad(dockerCli, opts)
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},
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}
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flags := cmd.Flags()
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flags.StringVarP(&opts.input, "input", "i", "", "Read from tar archive file, instead of STDIN")
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flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Suppress the load output")
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return cmd
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}
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func runLoad(dockerCli *command.DockerCli, opts loadOptions) error {
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var input io.Reader = dockerCli.In()
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if opts.input != "" {
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// We use system.OpenSequential to use sequential file access on Windows, avoiding
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// depleting the standby list un-necessarily. On Linux, this equates to a regular os.Open.
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file, err := system.OpenSequential(opts.input)
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if err != nil {
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return err
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}
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defer file.Close()
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input = file
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}
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// To avoid getting stuck, verify that a tar file is given either in
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// the input flag or through stdin and if not display an error message and exit.
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if opts.input == "" && dockerCli.In().IsTerminal() {
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return fmt.Errorf("requested load from stdin, but stdin is empty")
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}
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if !dockerCli.Out().IsTerminal() {
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opts.quiet = true
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}
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response, err := dockerCli.Client().ImageLoad(context.Background(), input, opts.quiet)
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if err != nil {
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return err
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}
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defer response.Body.Close()
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if response.Body != nil && response.JSON {
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return jsonmessage.DisplayJSONMessagesToStream(response.Body, dockerCli.Out(), nil)
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}
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_, err = io.Copy(dockerCli.Out(), response.Body)
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return err
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}
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