package images import ( "fmt" "os" "github.com/containers/common/pkg/auth" "github.com/containers/image/v5/types" "github.com/containers/podman/v2/cmd/podman/registry" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/containers/podman/v2/pkg/util" "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 CredentialsCLI string } 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 [options] IMAGE", Args: cobra.ExactArgs(1), Short: "Pull an image from a registry", Long: pullDescription, 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, Args: pullCmd.Args, Short: pullCmd.Short, Long: pullCmd.Long, 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, }) 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, }) 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.CredentialsCLI, "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.StringVar(&pullOptions.OverrideVariant, "override-variant", "", " use VARIANT instead of the running architecture variant for choosing images") flags.Bool("disable-content-trust", false, "This is a Docker specific option and is a NOOP") 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") flags.StringVar(&pullOptions.Authfile, "authfile", auth.GetDefaultAuthFile(), "Path of the authentication file. Use REGISTRY_AUTH_FILE environment variable to override") if !registry.IsRemote() { flags.StringVar(&pullOptions.CertDir, "cert-dir", "", "`Pathname` of a directory containing TLS certificates and keys") } _ = flags.MarkHidden("signature-policy") } // imagePull is implement the command for pulling images. func imagePull(cmd *cobra.Command, args []string) error { // 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") { pullOptions.SkipTLSVerify = types.NewOptionalBool(!pullOptions.TLSVerifyCLI) } if pullOptions.Authfile != "" { if _, err := os.Stat(pullOptions.Authfile); err != nil { return err } } if pullOptions.CredentialsCLI != "" { creds, err := util.ParseRegistryCreds(pullOptions.CredentialsCLI) if err != nil { return err } pullOptions.Username = creds.Username pullOptions.Password = creds.Password } // 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], pullOptions.ImagePullOptions) if err != nil { return err } if len(pullReport.Images) > 1 { fmt.Println("Pulled Images:") } for _, img := range pullReport.Images { fmt.Println(img) } return nil }