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package images
import (
"context"
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"github.com/containers/common/pkg/completion"
"github.com/containers/common/pkg/download"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/cmd/podman/validate"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/util"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/crypto/ssh/terminal"
)
var (
loadDescription = "Loads an image from a locally stored archive (tar file) into container storage."
loadCommand = &cobra.Command{
Use: "load [options]",
Short: "Load image(s) from a tar archive",
Long: loadDescription,
RunE: load,
Args: validate.NoArgs,
ValidArgsFunction: completion.AutocompleteNone,
}
imageLoadCommand = &cobra.Command{
Args: loadCommand.Args,
Use: loadCommand.Use,
Short: loadCommand.Short,
Long: loadCommand.Long,
ValidArgsFunction: loadCommand.ValidArgsFunction,
RunE: loadCommand.RunE,
}
)
var (
loadOpts entities.ImageLoadOptions
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: loadCommand,
})
loadFlags(loadCommand)
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: imageLoadCommand,
Parent: imageCmd,
})
loadFlags(imageLoadCommand)
}
func loadFlags(cmd *cobra.Command) {
flags := cmd.Flags()
inputFlagName := "input"
flags.StringVarP(&loadOpts.Input, inputFlagName, "i", "", "Read from specified archive file (default: stdin)")
_ = cmd.RegisterFlagCompletionFunc(inputFlagName, completion.AutocompleteDefault)
flags.BoolVarP(&loadOpts.Quiet, "quiet", "q", false, "Suppress the output")
flags.StringVar(&loadOpts.SignaturePolicy, "signature-policy", "", "Pathname of signature policy file")
_ = flags.MarkHidden("signature-policy")
}
func load(cmd *cobra.Command, args []string) error {
if len(loadOpts.Input) > 0 {
// Download the input file if needed.
if strings.HasPrefix(loadOpts.Input, "https://") || strings.HasPrefix(loadOpts.Input, "http://") {
tmpdir, err := util.DefaultContainerConfig().ImageCopyTmpDir()
if err != nil {
return err
}
tmpfile, err := download.FromURL(tmpdir, loadOpts.Input)
if err != nil {
return err
}
defer os.Remove(tmpfile)
loadOpts.Input = tmpfile
}
if _, err := os.Stat(loadOpts.Input); err != nil {
return err
}
} else {
if terminal.IsTerminal(int(os.Stdin.Fd())) {
return errors.Errorf("cannot read from terminal. Use command-line redirection or the --input flag.")
}
outFile, err := ioutil.TempFile(util.Tmpdir(), "podman")
if err != nil {
return errors.Errorf("error creating file %v", err)
}
defer os.Remove(outFile.Name())
defer outFile.Close()
_, err = io.Copy(outFile, os.Stdin)
if err != nil {
return errors.Errorf("error copying file %v", err)
}
loadOpts.Input = outFile.Name()
}
response, err := registry.ImageEngine().Load(context.Background(), loadOpts)
if err != nil {
return err
}
fmt.Println("Loaded image(s): " + strings.Join(response.Names, ","))
return nil
}
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