107 lines
3.1 KiB
Go
107 lines
3.1 KiB
Go
package ocipull
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/containers/buildah/pkg/parse"
|
|
"github.com/containers/image/v5/copy"
|
|
"github.com/containers/image/v5/oci/layout"
|
|
"github.com/containers/image/v5/pkg/shortnames"
|
|
"github.com/containers/image/v5/signature"
|
|
"github.com/containers/image/v5/transports/alltransports"
|
|
"github.com/containers/image/v5/types"
|
|
"github.com/containers/podman/v5/pkg/machine/define"
|
|
specV1 "github.com/opencontainers/image-spec/specs-go/v1"
|
|
)
|
|
|
|
// PullOptions includes data to alter certain knobs when pulling a source
|
|
// image.
|
|
type PullOptions struct {
|
|
// Require HTTPS and verify certificates when accessing the registry.
|
|
TLSVerify bool
|
|
// [username[:password] to use when connecting to the registry.
|
|
Credentials string
|
|
// Quiet the progress bars when pushing.
|
|
Quiet bool
|
|
}
|
|
|
|
// Pull `imageInput` from a container registry to `sourcePath`.
|
|
func Pull(ctx context.Context, imageInput types.ImageReference, localDestPath *define.VMFile, options *PullOptions) error {
|
|
if _, err := os.Stat(localDestPath.GetPath()); err == nil {
|
|
return fmt.Errorf("%q already exists", localDestPath.GetPath())
|
|
}
|
|
|
|
destRef, err := layout.ParseReference(localDestPath.GetPath())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
sysCtx := &types.SystemContext{
|
|
DockerInsecureSkipTLSVerify: types.NewOptionalBool(!options.TLSVerify),
|
|
}
|
|
if options.Credentials != "" {
|
|
authConf, err := parse.AuthConfig(options.Credentials)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sysCtx.DockerAuthConfig = authConf
|
|
}
|
|
|
|
if err := validateSourceImageReference(ctx, imageInput, sysCtx); err != nil {
|
|
return err
|
|
}
|
|
|
|
policy, err := signature.DefaultPolicy(sysCtx)
|
|
if err != nil {
|
|
return fmt.Errorf("obtaining default signature policy: %w", err)
|
|
}
|
|
policyContext, err := signature.NewPolicyContext(policy)
|
|
if err != nil {
|
|
return fmt.Errorf("creating new signature policy context: %w", err)
|
|
}
|
|
|
|
copyOpts := copy.Options{
|
|
SourceCtx: sysCtx,
|
|
}
|
|
if !options.Quiet {
|
|
copyOpts.ReportWriter = os.Stderr
|
|
}
|
|
if _, err := copy.Image(ctx, policyContext, destRef, imageInput, ©Opts); err != nil {
|
|
return fmt.Errorf("pulling source image: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func stringToImageReference(imageInput string) (types.ImageReference, error) { //nolint:unused
|
|
if shortnames.IsShortName(imageInput) {
|
|
return nil, fmt.Errorf("pulling source images by short name (%q) is not supported, please use a fully-qualified name", imageInput)
|
|
}
|
|
|
|
ref, err := alltransports.ParseImageName("docker://" + imageInput)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("parsing image name: %w", err)
|
|
}
|
|
|
|
return ref, nil
|
|
}
|
|
|
|
func validateSourceImageReference(ctx context.Context, ref types.ImageReference, sysCtx *types.SystemContext) error {
|
|
src, err := ref.NewImageSource(ctx, sysCtx)
|
|
if err != nil {
|
|
return fmt.Errorf("creating image source from reference: %w", err)
|
|
}
|
|
defer src.Close()
|
|
|
|
ociManifest, _, _, err := readManifestFromImageSource(ctx, src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if ociManifest.Config.MediaType != specV1.MediaTypeImageConfig {
|
|
return fmt.Errorf("invalid media type of image config %q (expected: %q)", ociManifest.Config.MediaType, specV1.MediaTypeImageConfig)
|
|
}
|
|
return nil
|
|
}
|