77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
package client
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import (
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"errors"
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"fmt"
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"net/url"
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"github.com/docker/distribution/reference"
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Cli "github.com/docker/docker/cli"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/registry"
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tagpkg "github.com/docker/docker/tag"
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)
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var errTagCantBeUsed = errors.New("tag can't be used with --all-tags/-a")
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// CmdPull pulls an image or a repository from the registry.
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//
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// Usage: docker pull [OPTIONS] IMAGENAME[:TAG|@DIGEST]
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func (cli *DockerCli) CmdPull(args ...string) error {
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cmd := Cli.Subcmd("pull", []string{"NAME[:TAG|@DIGEST]"}, Cli.DockerCommands["pull"].Description, true)
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allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository")
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addTrustedFlags(cmd, true)
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cmd.Require(flag.Exact, 1)
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cmd.ParseFlags(args, true)
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remote := cmd.Arg(0)
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distributionRef, err := reference.ParseNamed(remote)
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if err != nil {
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return err
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}
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var tag string
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switch x := distributionRef.(type) {
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case reference.Digested:
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if *allTags {
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return errTagCantBeUsed
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}
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tag = x.Digest().String()
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case reference.Tagged:
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if *allTags {
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return errTagCantBeUsed
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}
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tag = x.Tag()
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default:
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if !*allTags {
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tag = tagpkg.DefaultTag
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distributionRef, err = reference.WithTag(distributionRef, tag)
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if err != nil {
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return err
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}
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fmt.Fprintf(cli.out, "Using default tag: %s\n", tag)
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}
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}
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ref := registry.ParseReference(tag)
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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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if isTrusted() && !ref.HasDigest() {
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// Check if tag is digest
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authConfig := registry.ResolveAuthConfig(cli.configFile, repoInfo.Index)
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return cli.trustedPull(repoInfo, ref, authConfig)
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}
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v := url.Values{}
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v.Set("fromImage", distributionRef.String())
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_, _, err = cli.clientRequestAttemptLogin("POST", "/images/create?"+v.Encode(), nil, cli.out, repoInfo.Index, "pull")
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return err
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}
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