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authorBrent Baude <bbaude@redhat.com>2020-03-30 12:59:05 -0500
committerBrent Baude <bbaude@redhat.com>2020-04-03 13:07:35 -0500
commit837aad724ff1f7f4cc3b125b8b3419af29cd4982 (patch)
tree25ad8d10028a7d742e9fd61d1c96d87fbc342090 /cmd/podmanV2/images/save.go
parenta89d62ac3a445a5d76bd72d4b8e1bb9262ba74c6 (diff)
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podmanv2 save image
add ability to save an image for podman v2 Signed-off-by: Brent Baude <bbaude@redhat.com>
Diffstat (limited to 'cmd/podmanV2/images/save.go')
-rw-r--r--cmd/podmanV2/images/save.go87
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)
+}