86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
package image
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import (
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"fmt"
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"strings"
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"github.com/docker/distribution/reference"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/registry"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"golang.org/x/net/context"
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)
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type pullOptions struct {
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remote string
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all bool
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}
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// NewPullCommand creates a new `docker pull` command
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func NewPullCommand(dockerCli *command.DockerCli) *cobra.Command {
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var opts pullOptions
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cmd := &cobra.Command{
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Use: "pull [OPTIONS] NAME[:TAG|@DIGEST]",
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Short: "Pull an image or a repository from a registry",
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Args: cli.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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opts.remote = args[0]
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return runPull(dockerCli, opts)
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},
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}
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flags := cmd.Flags()
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flags.BoolVarP(&opts.all, "all-tags", "a", false, "Download all tagged images in the repository")
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command.AddTrustVerificationFlags(flags)
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return cmd
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}
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func runPull(dockerCli *command.DockerCli, opts pullOptions) error {
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distributionRef, err := reference.ParseNormalizedNamed(opts.remote)
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if err != nil {
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return err
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}
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if opts.all && !reference.IsNameOnly(distributionRef) {
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return errors.New("tag can't be used with --all-tags/-a")
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}
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if !opts.all && reference.IsNameOnly(distributionRef) {
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distributionRef = reference.TagNameOnly(distributionRef)
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if tagged, ok := distributionRef.(reference.Tagged); ok {
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fmt.Fprintf(dockerCli.Out(), "Using default tag: %s\n", tagged.Tag())
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}
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}
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// Resolve the Repository name from fqn to RepositoryInfo
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repoInfo, err := registry.ParseRepositoryInfo(distributionRef)
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if err != nil {
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return err
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}
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ctx := context.Background()
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authConfig := command.ResolveAuthConfig(ctx, dockerCli, repoInfo.Index)
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requestPrivilege := command.RegistryAuthenticationPrivilegedFunc(dockerCli, repoInfo.Index, "pull")
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// Check if reference has a digest
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_, isCanonical := distributionRef.(reference.Canonical)
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if command.IsTrusted() && !isCanonical {
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err = trustedPull(ctx, dockerCli, repoInfo, distributionRef, authConfig, requestPrivilege)
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} else {
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err = imagePullPrivileged(ctx, dockerCli, authConfig, reference.FamiliarString(distributionRef), requestPrivilege, opts.all)
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}
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if err != nil {
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if strings.Contains(err.Error(), "when fetching 'plugin'") {
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return errors.New(err.Error() + " - Use `docker plugin install`")
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}
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return err
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}
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return nil
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}
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