podmanv2 save image

add ability to save an image for podman v2

Signed-off-by: Brent Baude <bbaude@redhat.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/cmd/podmanV2/images/save.go b/cmd/podmanV2/images/save.go
new file mode 100644
index 000000000..ae39b7bce
--- /dev/null
+++ b/cmd/podmanV2/images/save.go
@@ -0,0 +1,87 @@
+package images
+
+import (
+	"context"
+	"os"
+	"strings"
+
+	"github.com/containers/libpod/libpod/define"
+
+	"github.com/containers/libpod/cmd/podmanV2/parse"
+	"github.com/containers/libpod/cmd/podmanV2/registry"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/pkg/util"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+var validFormats = []string{define.OCIManifestDir, define.OCIArchive, define.V2s2ManifestDir, define.V2s2Archive}
+
+var (
+	saveDescription = `Save an image to docker-archive or oci-archive on the local machine. Default is docker-archive.`
+
+	saveCommand = &cobra.Command{
+		Use:               "save [flags] IMAGE",
+		Short:             "Save image to an archive",
+		Long:              saveDescription,
+		PersistentPreRunE: preRunE,
+		RunE:              save,
+		Args: func(cmd *cobra.Command, args []string) error {
+			if len(args) == 0 {
+				return errors.Errorf("need at least 1 argument")
+			}
+			format, err := cmd.Flags().GetString("format")
+			if err != nil {
+				return err
+			}
+			if !util.StringInSlice(format, validFormats) {
+				return errors.Errorf("format value must be one of %s", strings.Join(validFormats, " "))
+			}
+			return nil
+		},
+		Example: `podman save --quiet -o myimage.tar imageID
+  podman save --format docker-dir -o ubuntu-dir ubuntu
+  podman save > alpine-all.tar alpine:latest`,
+	}
+)
+
+var (
+	saveOpts entities.ImageSaveOptions
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: saveCommand,
+	})
+	flags := saveCommand.Flags()
+	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)")
+	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)")
+	flags.StringVarP(&saveOpts.Output, "output", "o", "", "Write to a specified file (default: stdout, which must be redirected)")
+	flags.BoolVarP(&saveOpts.Quiet, "quiet", "q", false, "Suppress the output")
+
+}
+
+func save(cmd *cobra.Command, args []string) error {
+	var (
+		tags []string
+	)
+	if cmd.Flag("compress").Changed && (saveOpts.Format != define.OCIManifestDir && saveOpts.Format != define.V2s2ManifestDir && saveOpts.Format == "") {
+		return errors.Errorf("--compress can only be set when --format is either 'oci-dir' or 'docker-dir'")
+	}
+	if len(saveOpts.Output) == 0 {
+		fi := os.Stdout
+		if terminal.IsTerminal(int(fi.Fd())) {
+			return errors.Errorf("refusing to save to terminal. Use -o flag or redirect")
+		}
+		saveOpts.Output = "/dev/stdout"
+	}
+	if err := parse.ValidateFileName(saveOpts.Output); err != nil {
+		return err
+	}
+	if len(args) > 1 {
+		tags = args[1:]
+	}
+	return registry.ImageEngine().Save(context.Background(), args[0], tags, saveOpts)
+}