mirror of https://github.com/containers/podman.git
95 lines
3.1 KiB
Go
95 lines
3.1 KiB
Go
package main
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import (
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"os"
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"strings"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/cmd/podman/shared/parse"
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"github.com/containers/libpod/pkg/adapter"
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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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const (
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ociManifestDir = "oci-dir"
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ociArchive = "oci-archive"
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v2s2ManifestDir = "docker-dir"
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v2s2Archive = "docker-archive"
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)
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var validFormats = []string{ociManifestDir, ociArchive, v2s2ManifestDir, v2s2Archive}
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var (
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saveCommand cliconfig.SaveValues
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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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RunE: func(cmd *cobra.Command, args []string) error {
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saveCommand.InputArgs = args
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saveCommand.GlobalFlags = MainGlobalOpts
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saveCommand.Remote = remoteclient
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return saveCmd(&saveCommand)
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},
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Args: func(cmd *cobra.Command, args []string) error {
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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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func init() {
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saveCommand.Command = _saveCommand
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saveCommand.SetHelpTemplate(HelpTemplate())
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saveCommand.SetUsageTemplate(UsageTemplate())
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flags := saveCommand.Flags()
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flags.BoolVar(&saveCommand.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(&saveCommand.Format, "format", 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(&saveCommand.Output, "output", "o", "", "Write to a specified file (default: stdout, which must be redirected)")
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flags.BoolVarP(&saveCommand.Quiet, "quiet", "q", false, "Suppress the output")
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}
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// saveCmd saves the image to either docker-archive or oci
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func saveCmd(c *cliconfig.SaveValues) error {
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args := c.InputArgs
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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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runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
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if err != nil {
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return errors.Wrapf(err, "could not create runtime")
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}
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defer runtime.DeferredShutdown(false)
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if c.Flag("compress").Changed && (c.Format != ociManifestDir && c.Format != v2s2ManifestDir && c.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(c.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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c.Output = "/dev/stdout"
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}
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if err := parse.ValidateFileName(c.Output); err != nil {
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return err
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}
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return runtime.SaveImage(getContext(), c)
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}
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