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3163a98bdd
Add a "push" command, which pulls an image's layers from local storage, recomputes the image's digest and manifest, and uses the image library to write the result to the specified location. Signed-off-by: Nalin Dahyabhai <nalin@redhat.com> Closes: #141 Approved by: rhatdan
85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
package main
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import (
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"os"
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"github.com/containers/image/transports/alltransports"
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"github.com/containers/storage/pkg/archive"
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"github.com/pkg/errors"
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"github.com/projectatomic/buildah"
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"github.com/urfave/cli"
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)
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var (
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pushFlags = []cli.Flag{
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cli.BoolFlag{
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Name: "disable-compression, D",
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Usage: "don't compress layers",
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},
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cli.StringFlag{
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Name: "signature-policy",
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Usage: "`pathname` of signature policy file (not usually used)",
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},
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cli.BoolFlag{
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Name: "quiet, q",
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Usage: "don't output progress information when pushing images",
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},
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}
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pushDescription = "Pushes an image to a specified location."
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pushCommand = cli.Command{
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Name: "push",
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Usage: "Push an image to a specified location",
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Description: pushDescription,
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Flags: pushFlags,
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Action: pushCmd,
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ArgsUsage: "IMAGE [TRANSPORT:]IMAGE",
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}
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)
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func pushCmd(c *cli.Context) error {
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args := c.Args()
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if len(args) < 2 {
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return errors.New("source and destination image IDs must be specified")
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}
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src := args[0]
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destSpec := args[1]
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signaturePolicy := ""
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if c.IsSet("signature-policy") {
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signaturePolicy = c.String("signature-policy")
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}
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compress := archive.Uncompressed
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if !c.IsSet("disable-compression") || !c.Bool("disable-compression") {
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compress = archive.Gzip
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}
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quiet := false
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if c.IsSet("quiet") {
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quiet = c.Bool("quiet")
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}
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store, err := getStore(c)
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if err != nil {
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return err
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}
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dest, err := alltransports.ParseImageName(destSpec)
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if err != nil {
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return err
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}
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options := buildah.PushOptions{
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Compression: compress,
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SignaturePolicyPath: signaturePolicy,
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Store: store,
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}
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if !quiet {
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options.ReportWriter = os.Stderr
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}
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err = buildah.Push(src, dest, options)
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if err != nil {
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return errors.Wrapf(err, "error pushing image %q to %q", src, destSpec)
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}
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return nil
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}
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