feat: Retag referenced images when they are relocated

During relocation of referenced images, the images will no longer loose
their tag and name.

Signed-off-by: Kim Christensen <kimworking@gmail.com>

cmd/porter/bundle.go

@@ -99,6 +99,7 @@ The docker driver builds the bundle image using the local Docker host. To use a
 		"Define an individual key-value pair for the custom section in the form of NAME=VALUE. Use dot notation to specify a nested custom field. May be specified multiple times. Max length is 5,000 characters when used as a build argument.")
 	f.BoolVar(&opts.InsecureRegistry, "insecure-registry", false,
 		"Don't require TLS when pulling referenced images")
+	f.BoolVar(&opts.PreserveTags, "preserve-tags", false, "Preserve the original tag name on referenced images")
 
 	// Allow configuring the --driver flag with build-driver, to avoid conflicts with other commands
 	cmd.Flag("driver").Annotations = map[string][]string{
@@ -178,6 +179,7 @@ Note: if overrides for registry/tag/reference are provided, this command only re
 	}
 	f.BoolVar(&opts.AutoBuildDisabled, "autobuild-disabled", false, "Do not automatically build the bundle from source when the last build is out-of-date.")
 	f.BoolVar(&opts.SignBundle, "sign-bundle", false, "Sign the bundle using the configured signing plugin")
+	f.BoolVar(&opts.PreserveTags, "preserve-tags", false, "Preserve the original tag name on referenced images")
 
 	return &cmd
 }

docs/content/docs/references/cli/build.md

@@ -46,6 +46,7 @@ porter build [flags]
       --name string             Override the bundle name
       --no-cache                Do not use the Docker cache when building the bundle image.
       --no-lint                 Do not run the linter
+      --preserve-tags           Preserve the original tag name on referenced images
       --secret stringArray      Secret file to expose to the build (format: id=mysecret,src=/local/secret). Custom values are accessible as build arguments in the template Dockerfile and in the manifest using template variables. May be specified multiple times.
       --ssh stringArray         SSH agent socket or keys to expose to the build (format: default|<id>[=<socket>|<key>[,<key>]]). May be specified multiple times.
       --version string          Override the bundle version

docs/content/docs/references/cli/bundles_build.md

@@ -46,6 +46,7 @@ porter bundles build [flags]
       --name string             Override the bundle name
       --no-cache                Do not use the Docker cache when building the bundle image.
       --no-lint                 Do not run the linter
+      --preserve-tags           Preserve the original tag name on referenced images
       --secret stringArray      Secret file to expose to the build (format: id=mysecret,src=/local/secret). Custom values are accessible as build arguments in the template Dockerfile and in the manifest using template variables. May be specified multiple times.
       --ssh stringArray         SSH agent socket or keys to expose to the build (format: default|<id>[=<socket>|<key>[,<key>]]). May be specified multiple times.
       --version string          Override the bundle version

docs/content/docs/references/cli/publish.md

@@ -40,6 +40,7 @@ porter publish [flags]
       --force                Force push the bundle to overwrite the previously published bundle
   -h, --help                 help for publish
       --insecure-registry    Don't require TLS for the registry
+      --preserve-tags        Preserve the original tag name on referenced images
   -r, --reference string     Use a bundle in an OCI registry specified by the given reference.
       --registry string      Override the registry portion of the bundle reference, e.g. docker.io, myregistry.com/myorg
       --sign-bundle          Sign the bundle using the configured signing plugin

pkg/cnab/cnab-to-oci/provider.go

@@ -54,3 +54,13 @@ func (o RegistryOptions) toCraneOptions() []crane.Option {
 	}
 	return result
 }
+
+type PushBundleOptions struct {
+	RegistryOptions
+}
+
+func WithRegistryOptions(registryOpts RegistryOptions) func(*PushBundleOptions) {
+	return func(opts *PushBundleOptions) {
+		opts.RegistryOptions = registryOpts
+	}
+}

pkg/cnab/cnab-to-oci/registry.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 
 	"get.porter.sh/porter/pkg/cnab"
+	configadapter "get.porter.sh/porter/pkg/cnab/config-adapter"
 	"get.porter.sh/porter/pkg/portercontext"
 	"get.porter.sh/porter/pkg/tracing"
 	"github.com/cnabio/cnab-go/driver/docker"
@@ -95,6 +96,7 @@ func (r *Registry) PullBundle(ctx context.Context, ref cnab.OCIReference, opts R
 	return bundleRef, nil
 }
 
+// PushBundle pushes a bundle to an OCI registry.
 func (r *Registry) PushBundle(ctx context.Context, bundleRef cnab.BundleReference, opts RegistryOptions) (cnab.BundleReference, error) {
 	ctx, log := tracing.StartSpan(ctx)
 	defer log.EndSpan()
@@ -154,6 +156,17 @@ func (r *Registry) PushBundle(ctx context.Context, bundleRef cnab.BundleReferenc
 	}
 	bundleRef.Digest = d.Digest
 
+	stamp, err := configadapter.LoadStamp(bundleRef.Definition)
+	if err != nil {
+		return cnab.BundleReference{}, log.Errorf("error loading stamp from bundle: %w", err)
+	}
+	if stamp.PreserveTags {
+		err = preserveRelocatedImageTags(ctx, bundleRef, opts)
+		if err != nil {
+			return cnab.BundleReference{}, log.Error(fmt.Errorf("error preserving tags on relocated images: %w", err))
+		}
+	}
+
 	log.Infof("Bundle %s pushed successfully, with digest %q\n", bundleRef.Reference, d.Digest)
 	return bundleRef, nil
 }
@@ -461,3 +474,44 @@ func GetInsecureRegistryTransport() *http.Transport {
 	skipTLS.TLSClientConfig.InsecureSkipVerify = true
 	return skipTLS
 }
+
+func preserveRelocatedImageTags(ctx context.Context, bundleRef cnab.BundleReference, opts RegistryOptions) error {
+	_, log := tracing.StartSpan(ctx)
+	defer log.EndSpan()
+
+	if len(bundleRef.Definition.Images) <= 0 {
+		log.Debugf("No images to preserve tags on")
+		return nil
+	}
+
+	log.Infof("Tagging relocated images...")
+	for _, image := range bundleRef.Definition.Images {
+		imageRef, err := cnab.ParseOCIReference(image.Image)
+		if err != nil {
+			return log.Errorf("error parsing image reference %s: %w", image.Image, err)
+		}
+
+		if !imageRef.HasTag() {
+			log.Debugf("Image %s has no tag, skipping", imageRef)
+			continue
+		}
+
+		if relocImage, ok := bundleRef.RelocationMap[image.Image]; ok {
+			relocRef, err := cnab.ParseOCIReference(relocImage)
+			if err != nil {
+				return log.Errorf("error parsing image reference %s: %w", relocImage, err)
+			}
+
+			dstRef := fmt.Sprintf("%s/%s:%s", relocRef.Registry(), imageRef.Repository(), imageRef.Tag())
+			log.Debugf("Copying image %s to %s", relocRef, dstRef)
+			err = crane.Copy(relocRef.String(), dstRef, opts.toCraneOptions()...)
+			if err != nil {
+				return log.Errorf("error copying image %s to %s: %w", relocRef, dstRef, err)
+			}
+		} else {
+			log.Debugf("No relocation for image %s", imageRef)
+		}
+	}
+
+	return nil
+}

pkg/cnab/config-adapter/adapter.go

@@ -25,27 +25,30 @@ type ManifestConverter struct {
 	Manifest        *manifest.Manifest
 	ImageDigests    map[string]string
 	InstalledMixins []mixin.Metadata
+	PreserveTags    bool
 }
 
 func NewManifestConverter(
 	config *config.Config,
 	manifest *manifest.Manifest,
 	imageDigests map[string]string,
 	mixins []mixin.Metadata,
+	preserveTags bool,
 ) *ManifestConverter {
 	return &ManifestConverter{
 		config:          config,
 		Manifest:        manifest,
 		ImageDigests:    imageDigests,
 		InstalledMixins: mixins,
+		PreserveTags:    preserveTags,
 	}
 }
 
 func (c *ManifestConverter) ToBundle(ctx context.Context) (cnab.ExtendedBundle, error) {
 	ctx, span := tracing.StartSpan(ctx)
 	defer span.EndSpan()
 
-	stamp, err := c.GenerateStamp(ctx)
+	stamp, err := c.GenerateStamp(ctx, c.PreserveTags)
 	if err != nil {
 		return cnab.ExtendedBundle{}, span.Error(err)
 	}