mirror of
https://github.com/containers/podman.git
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837aad724f
add ability to save an image for podman v2 Signed-off-by: Brent Baude <bbaude@redhat.com>
88 lines
2.9 KiB
Go
88 lines
2.9 KiB
Go
package images
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import (
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"context"
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"os"
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"strings"
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"github.com/containers/libpod/libpod/define"
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"github.com/containers/libpod/cmd/podmanV2/parse"
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"github.com/containers/libpod/cmd/podmanV2/registry"
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"github.com/containers/libpod/pkg/domain/entities"
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"github.com/containers/libpod/pkg/util"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"golang.org/x/crypto/ssh/terminal"
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)
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var validFormats = []string{define.OCIManifestDir, define.OCIArchive, define.V2s2ManifestDir, define.V2s2Archive}
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var (
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saveDescription = `Save an image to docker-archive or oci-archive on the local machine. Default is docker-archive.`
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saveCommand = &cobra.Command{
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Use: "save [flags] IMAGE",
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Short: "Save image to an archive",
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Long: saveDescription,
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PersistentPreRunE: preRunE,
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RunE: save,
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Args: func(cmd *cobra.Command, args []string) error {
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if len(args) == 0 {
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return errors.Errorf("need at least 1 argument")
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}
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format, err := cmd.Flags().GetString("format")
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if err != nil {
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return err
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}
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if !util.StringInSlice(format, validFormats) {
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return errors.Errorf("format value must be one of %s", strings.Join(validFormats, " "))
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}
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return nil
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},
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Example: `podman save --quiet -o myimage.tar imageID
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podman save --format docker-dir -o ubuntu-dir ubuntu
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podman save > alpine-all.tar alpine:latest`,
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}
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)
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var (
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saveOpts entities.ImageSaveOptions
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
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Command: saveCommand,
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})
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flags := saveCommand.Flags()
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flags.BoolVar(&saveOpts.Compress, "compress", false, "Compress tarball image layers when saving to a directory using the 'dir' transport. (default is same compression type as source)")
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flags.StringVar(&saveOpts.Format, "format", define.V2s2Archive, "Save image to oci-archive, oci-dir (directory with oci manifest type), docker-archive, docker-dir (directory with v2s2 manifest type)")
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flags.StringVarP(&saveOpts.Output, "output", "o", "", "Write to a specified file (default: stdout, which must be redirected)")
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flags.BoolVarP(&saveOpts.Quiet, "quiet", "q", false, "Suppress the output")
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}
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func save(cmd *cobra.Command, args []string) error {
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var (
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tags []string
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)
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if cmd.Flag("compress").Changed && (saveOpts.Format != define.OCIManifestDir && saveOpts.Format != define.V2s2ManifestDir && saveOpts.Format == "") {
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return errors.Errorf("--compress can only be set when --format is either 'oci-dir' or 'docker-dir'")
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}
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if len(saveOpts.Output) == 0 {
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fi := os.Stdout
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if terminal.IsTerminal(int(fi.Fd())) {
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return errors.Errorf("refusing to save to terminal. Use -o flag or redirect")
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}
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saveOpts.Output = "/dev/stdout"
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}
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if err := parse.ValidateFileName(saveOpts.Output); err != nil {
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return err
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}
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if len(args) > 1 {
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tags = args[1:]
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}
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return registry.ImageEngine().Save(context.Background(), args[0], tags, saveOpts)
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}
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