chore: rename SignIndexAttestations to just Sign

README.md

@@ -42,9 +42,9 @@ library to create, verify, and evaluate policy for attestations on container ima
 
 1. sign attestations
     ```go
-    signedImageIndex, err := attest.SignIndexAttestations(ctx, att, signer, opts)
+    signedImageIndex, err := attest.Sign(ctx, att, signer, opts)
     ```
-    `attest.SignedIndexAttestations()` iterates over all attestation manifests in the image index and signs all intoto statements (optionally generates a VSA), returning a mutated ImageIndex with all intoto statements signed as attestations.
+    `attest.Sign()` iterates over attestation manifests in the image index and signs all intoto statements (optionally generates a VSA), returning a mutated ImageIndex with all intoto statements signed as attestations.
 
 1. save output (optional)
     * push to oci registry

pkg/attest/sign.go

@@ -17,7 +17,7 @@ import (
 	"github.com/secure-systems-lab/go-securesystemslib/dsse"
 )
 
-func SignIndexAttestations(ctx context.Context, idx v1.ImageIndex, signer dsse.SignerVerifier, opts *SigningOptions) (v1.ImageIndex, error) {
+func Sign(ctx context.Context, idx v1.ImageIndex, signer dsse.SignerVerifier, opts *SigningOptions) (v1.ImageIndex, error) {
 	// extract attestation manifests from index
 	attestationManifests, err := attestation.GetAttestationManifestsFromIndex(idx)
 	if err != nil {

pkg/attest/sign_test.go

@@ -61,7 +61,7 @@ func TestSignVerifyOCILayout(t *testing.T) {
 			}
 			attIdx, err := oci.AttestationIndexFromPath(tc.TestImage)
 			assert.NoError(t, err)
-			signedIndex, err := SignIndexAttestations(ctx, attIdx.Index, signer, opts)
+			signedIndex, err := Sign(ctx, attIdx.Index, signer, opts)
 			assert.NoError(t, err)
 
 			// output signed attestations