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author | OpenShift Merge Robot <openshift-merge-robot@users.noreply.github.com> | 2020-03-31 21:12:49 +0200 |
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committer | GitHub <noreply@github.com> | 2020-03-31 21:12:49 +0200 |
commit | 6e8f6cab602b43d05c97c167faa56b3f46f1f73a (patch) | |
tree | c4b4f2ab7e91e4f49d2fe5a9b9d89be455bdd219 /cmd/podmanV2/images/pull.go | |
parent | 56ab9e4cc8a33bb8a791a799753a11c33809dedf (diff) | |
parent | 3bdad6fa2af41be7e783256f3c8a213dc42ca8f6 (diff) | |
download | podman-6e8f6cab602b43d05c97c167faa56b3f46f1f73a.tar.gz podman-6e8f6cab602b43d05c97c167faa56b3f46f1f73a.tar.bz2 podman-6e8f6cab602b43d05c97c167faa56b3f46f1f73a.zip |
Merge pull request #5675 from vrothberg/v2-pull
podmanV2: implement pull
Diffstat (limited to 'cmd/podmanV2/images/pull.go')
-rw-r--r-- | cmd/podmanV2/images/pull.go | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/cmd/podmanV2/images/pull.go b/cmd/podmanV2/images/pull.go new file mode 100644 index 000000000..c7e325409 --- /dev/null +++ b/cmd/podmanV2/images/pull.go @@ -0,0 +1,140 @@ +package images + +import ( + "fmt" + + buildahcli "github.com/containers/buildah/pkg/cli" + "github.com/containers/image/v5/types" + "github.com/containers/libpod/cmd/podmanV2/registry" + "github.com/containers/libpod/pkg/domain/entities" + "github.com/opentracing/opentracing-go" + "github.com/pkg/errors" + "github.com/spf13/cobra" + "github.com/spf13/pflag" +) + +// pullOptionsWrapper wraps entities.ImagePullOptions and prevents leaking +// CLI-only fields into the API types. +type pullOptionsWrapper struct { + entities.ImagePullOptions + TLSVerifyCLI bool // CLI only +} + +var ( + pullOptions = pullOptionsWrapper{} + pullDescription = `Pulls an image from a registry and stores it locally. + + An image can be pulled by tag or digest. If a tag is not specified, the image with the 'latest' tag is pulled.` + + // Command: podman pull + pullCmd = &cobra.Command{ + Use: "pull [flags] IMAGE", + Short: "Pull an image from a registry", + Long: pullDescription, + PreRunE: preRunE, + RunE: imagePull, + Example: `podman pull imageName + podman pull fedora:latest`, + } + + // Command: podman image pull + // It's basically a clone of `pullCmd` with the exception of being a + // child of the images command. + imagesPullCmd = &cobra.Command{ + Use: pullCmd.Use, + Short: pullCmd.Short, + Long: pullCmd.Long, + PreRunE: pullCmd.PreRunE, + RunE: pullCmd.RunE, + Example: `podman image pull imageName + podman image pull fedora:latest`, + } +) + +func init() { + // pull + registry.Commands = append(registry.Commands, registry.CliCommand{ + Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode}, + Command: pullCmd, + }) + + pullCmd.SetHelpTemplate(registry.HelpTemplate()) + pullCmd.SetUsageTemplate(registry.UsageTemplate()) + + flags := pullCmd.Flags() + pullFlags(flags) + + // images pull + registry.Commands = append(registry.Commands, registry.CliCommand{ + Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode}, + Command: imagesPullCmd, + Parent: imageCmd, + }) + + imagesPullCmd.SetHelpTemplate(registry.HelpTemplate()) + imagesPullCmd.SetUsageTemplate(registry.UsageTemplate()) + imagesPullFlags := imagesPullCmd.Flags() + pullFlags(imagesPullFlags) +} + +// pullFlags set the flags for the pull command. +func pullFlags(flags *pflag.FlagSet) { + flags.BoolVar(&pullOptions.AllTags, "all-tags", false, "All tagged images in the repository will be pulled") + flags.StringVar(&pullOptions.Authfile, "authfile", buildahcli.GetDefaultAuthFile(), "Path of the authentication file. Use REGISTRY_AUTH_FILE environment variable to override") + flags.StringVar(&pullOptions.CertDir, "cert-dir", "", "`Pathname` of a directory containing TLS certificates and keys") + flags.StringVar(&pullOptions.Credentials, "creds", "", "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry") + flags.StringVar(&pullOptions.OverrideArch, "override-arch", "", "Use `ARCH` instead of the architecture of the machine for choosing images") + flags.StringVar(&pullOptions.OverrideOS, "override-os", "", "Use `OS` instead of the running OS for choosing images") + flags.BoolVarP(&pullOptions.Quiet, "quiet", "q", false, "Suppress output information when pulling images") + flags.StringVar(&pullOptions.SignaturePolicy, "signature-policy", "", "`Pathname` of signature policy file (not usually used)") + flags.BoolVar(&pullOptions.TLSVerifyCLI, "tls-verify", true, "Require HTTPS and verify certificates when contacting registries") + + if registry.IsRemote() { + _ = flags.MarkHidden("authfile") + _ = flags.MarkHidden("cert-dir") + _ = flags.MarkHidden("signature-policy") + _ = flags.MarkHidden("tls-verify") + } +} + +// imagePull is implement the command for pulling images. +func imagePull(cmd *cobra.Command, args []string) error { + // Sanity check input. + 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") + } + + // Start tracing if requested. + if cmd.Flags().Changed("trace") { + span, _ := opentracing.StartSpanFromContext(registry.GetContext(), "pullCmd") + defer span.Finish() + } + + pullOptsAPI := pullOptions.ImagePullOptions + // TLS verification in c/image is controlled via a `types.OptionalBool` + // which allows for distinguishing among set-true, set-false, unspecified + // which is important to implement a sane way of dealing with defaults of + // boolean CLI flags. + if cmd.Flags().Changed("tls-verify") { + pullOptsAPI.TLSVerify = types.NewOptionalBool(pullOptions.TLSVerifyCLI) + } + + // Let's do all the remaining Yoga in the API to prevent us from + // scattering logic across (too) many parts of the code. + pullReport, err := registry.ImageEngine().Pull(registry.GetContext(), args[0], pullOptsAPI) + if err != nil { + return err + } + + if len(pullReport.Images) > 1 { + fmt.Println("Pulled Images:") + } + for _, img := range pullReport.Images { + fmt.Println(img) + } + + return nil +} |