exporter: allow configuring inline attestations for image exporters

Signed-off-by: Justin Chadwell <me@jedevc.com>
(cherry picked from commit 3eaf157)

exporter/containerimage/opts.go

@@ -12,13 +12,14 @@ import (
 )
 
 const (
-	keyImageName        = "name"
-	keyLayerCompression = "compression"
-	keyCompressionLevel = "compression-level"
-	keyForceCompression = "force-compression"
-	keyOCITypes         = "oci-mediatypes"
-	keyBuildInfo        = "buildinfo"
-	keyBuildInfoAttrs   = "buildinfo-attrs"
+	keyImageName               = "name"
+	keyLayerCompression        = "compression"
+	keyCompressionLevel        = "compression-level"
+	keyForceCompression        = "force-compression"
+	keyOCITypes                = "oci-mediatypes"
+	keyBuildInfo               = "buildinfo"
+	keyBuildInfoAttrs          = "buildinfo-attrs"
+	keyForceInlineAttestations = "attestation-inline"
 
 	// preferNondistLayersKey is an exporter option which can be used to mark a layer as non-distributable if the layer reference was
 	// already found to use a non-distributable media type.
@@ -75,6 +76,8 @@ func (c *ImageCommitOpts) Load(opt map[string]string) (map[string]string, error)
 			err = parseBoolWithDefault(&c.BuildInfo, k, v, true)
 		case keyBuildInfoAttrs:
 			err = parseBoolWithDefault(&c.BuildInfoAttrs, k, v, false)
+		case keyForceInlineAttestations:
+			err = parseBool(&c.ForceInlineAttestations, k, v)
 		case keyPreferNondistLayers:
 			err = parseBool(&c.RefCfg.PreferNonDistributable, k, v)
 		default: