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package main
import (
"fmt"
"io"
"os"
buildahcli "github.com/containers/buildah/pkg/cli"
"github.com/containers/image/v5/docker"
dockerarchive "github.com/containers/image/v5/docker/archive"
"github.com/containers/image/v5/transports/alltransports"
"github.com/containers/image/v5/types"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/adapter"
"github.com/containers/libpod/pkg/util"
"github.com/docker/distribution/reference"
"github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
pullCommand cliconfig.PullValues
pullDescription = `Pulls an image from a registry and stores it locally.
An image can be pulled using its tag or digest. If a tag is not specified, the image with the 'latest' tag (if it exists) is pulled.`
_pullCommand = &cobra.Command{
Use: "pull [flags] IMAGE-PATH",
Short: "Pull an image from a registry",
Long: pullDescription,
RunE: func(cmd *cobra.Command, args []string) error {
pullCommand.InputArgs = args
pullCommand.GlobalFlags = MainGlobalOpts
pullCommand.Remote = remoteclient
return pullCmd(&pullCommand)
},
Example: `podman pull imageName
podman pull fedora:latest`,
}
)
func init() {
if !remote {
_pullCommand.Example = fmt.Sprintf("%s\n podman pull --cert-dir image/certs --authfile temp-auths/myauths.json docker://docker.io/myrepo/finaltest", _pullCommand.Example)
}
pullCommand.Command = _pullCommand
pullCommand.SetHelpTemplate(HelpTemplate())
pullCommand.SetUsageTemplate(UsageTemplate())
flags := pullCommand.Flags()
flags.BoolVar(&pullCommand.AllTags, "all-tags", false, "All tagged images in the repository will be pulled")
flags.StringVar(&pullCommand.Creds, "creds", "", "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry")
flags.BoolVarP(&pullCommand.Quiet, "quiet", "q", false, "Suppress output information when pulling images")
flags.StringVar(&pullCommand.OverrideArch, "override-arch", "", "use `ARCH` instead of the architecture of the machine for choosing images")
flags.StringVar(&pullCommand.OverrideOS, "override-os", "", "use `OS` instead of the running OS for choosing images")
markFlagHidden(flags, "override-os")
// Disabled flags for the remote client
if !remote {
flags.StringVar(&pullCommand.Authfile, "authfile", buildahcli.GetDefaultAuthFile(), "Path of the authentication file. Use REGISTRY_AUTH_FILE environment variable to override")
flags.StringVar(&pullCommand.CertDir, "cert-dir", "", "`Pathname` of a directory containing TLS certificates and keys")
flags.StringVar(&pullCommand.SignaturePolicy, "signature-policy", "", "`Pathname` of signature policy file (not usually used)")
flags.BoolVar(&pullCommand.TlsVerify, "tls-verify", true, "Require HTTPS and verify certificates when contacting registries")
markFlagHidden(flags, "signature-policy")
}
}
// pullCmd gets the data from the command line and calls pullImage
// to copy an image from a registry to a local machine
func pullCmd(c *cliconfig.PullValues) (retError error) {
defer func() {
if retError != nil && exitCode == 0 {
exitCode = 1
}
}()
if c.Bool("trace") {
span, _ := opentracing.StartSpanFromContext(Ctx, "pullCmd")
defer span.Finish()
}
runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.DeferredShutdown(false)
args := c.InputArgs
if len(args) == 0 {
return errors.Errorf("an image name must be specified")
}
if len(args) > 1 {
return errors.Errorf("too many arguments. Requires exactly 1")
}
if c.Authfile != "" {
if _, err := os.Stat(c.Authfile); err != nil {
return errors.Wrapf(err, "error getting authfile %s", c.Authfile)
}
}
ctx := getContext()
imageName := args[0]
imageRef, err := alltransports.ParseImageName(imageName)
if err != nil {
imageRef, err = alltransports.ParseImageName(fmt.Sprintf("%s://%s", docker.Transport.Name(), imageName))
if err != nil {
return errors.Errorf("invalid image reference %q", imageName)
}
}
var writer io.Writer
if !c.Quiet {
writer = os.Stderr
}
// Special-case for docker-archive which allows multiple tags.
if imageRef.Transport().Name() == dockerarchive.Transport.Name() {
newImage, err := runtime.LoadFromArchiveReference(getContext(), imageRef, c.SignaturePolicy, writer)
if err != nil {
return errors.Wrapf(err, "error pulling image %q", imageName)
}
fmt.Println(newImage[0].ID())
return nil
}
var registryCreds *types.DockerAuthConfig
if c.Flag("creds").Changed {
creds, err := util.ParseRegistryCreds(c.Creds)
if err != nil {
return err
}
registryCreds = creds
}
dockerRegistryOptions := image.DockerRegistryOptions{
DockerRegistryCreds: registryCreds,
DockerCertPath: c.CertDir,
OSChoice: c.OverrideOS,
ArchitectureChoice: c.OverrideArch,
}
if c.IsSet("tls-verify") {
dockerRegistryOptions.DockerInsecureSkipTLSVerify = types.NewOptionalBool(!c.TlsVerify)
}
if !c.Bool("all-tags") {
newImage, err := runtime.New(getContext(), imageName, c.SignaturePolicy, c.Authfile, writer, &dockerRegistryOptions, image.SigningOptions{}, nil, util.PullImageAlways)
if err != nil {
return errors.Wrapf(err, "error pulling image %q", imageName)
}
fmt.Println(newImage.ID())
return nil
}
// --all-tags requires the docker transport
if imageRef.Transport().Name() != docker.Transport.Name() {
return errors.New("--all-tags requires docker transport")
}
// all-tags doesn't work with a tagged reference, so let's check early
namedRef, err := reference.Parse(imageName)
if err != nil {
return errors.Wrapf(err, "error parsing %q", imageName)
}
if _, isTagged := namedRef.(reference.Tagged); isTagged {
return errors.New("--all-tags requires a reference without a tag")
}
systemContext := image.GetSystemContext("", c.Authfile, false)
tags, err := docker.GetRepositoryTags(ctx, systemContext, imageRef)
if err != nil {
return errors.Wrapf(err, "error getting repository tags")
}
var foundIDs []string
for _, tag := range tags {
name := imageName + ":" + tag
newImage, err := runtime.New(getContext(), name, c.SignaturePolicy, c.Authfile, writer, &dockerRegistryOptions, image.SigningOptions{}, nil, util.PullImageAlways)
if err != nil {
logrus.Errorf("error pulling image %q", name)
continue
}
foundIDs = append(foundIDs, newImage.ID())
}
if len(tags) != len(foundIDs) {
return errors.Errorf("error pulling image %q", imageName)
}
if len(foundIDs) > 1 {
fmt.Println("Pulled Images:")
}
for _, id := range foundIDs {
fmt.Println(id)
}
return nil
}
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