chore: reformat with gofumpt (#109)

* Reformat with gofumpt

* Suppress issue about laxer perms than 0600

---------

Co-authored-by: Joel Kamp <joel.kamp@docker.com>

pkg/oci/layout.go

@@ -55,10 +55,9 @@ func (r *OCILayoutResolver) Attestations(ctx context.Context, predicateType stri
 		if mts != dsseMediaType {
 			continue
 		}
-		var env = new(att.Envelope)
+		env := new(att.Envelope)
 		// parse layer blob as json
 		r, err := attestationLayer.Layer.Uncompressed()
-
 		if err != nil {
 			return nil, fmt.Errorf("failed to get layer contents: %w", err)
 		}

pkg/oci/oci.go

@@ -63,7 +63,7 @@ func ExtractEnvelopes(manifest *attestation.AttestationManifest, predicateType s
 				return nil, fmt.Errorf("failed to get layer contents: %w", err)
 			}
 			defer reader.Close()
-			var env = new(att.Envelope)
+			env := new(att.Envelope)
 			err = json.NewDecoder(reader).Decode(&env)
 			if err != nil {
 				return nil, fmt.Errorf("failed to decode envelope: %w", err)

pkg/oci/oci_test.go

@@ -54,9 +54,7 @@ func TestRefToPurl(t *testing.T) {
 	assert.True(t, canonical)
 }
 
-var (
-	UnsignedTestImage = filepath.Join("..", "..", "test", "testdata", "unsigned-test-image")
-)
+var UnsignedTestImage = filepath.Join("..", "..", "test", "testdata", "unsigned-test-image")
 
 // Test fix for https://github.com/docker/secure-artifacts-team-issues/issues/202
 func TestImageDigestForPlatform(t *testing.T) {

pkg/oci/referrers.go

@@ -35,8 +35,7 @@ func WithReferrersRepo(repo string) func(*ReferrersResolver) error {
 	}
 }
 
-func (r *ReferrersResolver) resolveAttestations(ctx context.Context, predicateType string) ([]*attestation.AttestationManifest,
-	error) {
+func (r *ReferrersResolver) resolveAttestations(ctx context.Context, predicateType string) ([]*attestation.AttestationManifest, error) {
 	dsseMediaType, err := attestation.DSSEMediaType(predicateType)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get DSSE media type for predicate '%s': %w", predicateType, err)

pkg/oci/types.go

@@ -18,11 +18,13 @@ const (
 	Docker             SourceType = "Docker"
 )
 
-type SourceType string
-type NamedIndex struct {
-	Index v1.ImageIndex
-	Name  string
-}
+type (
+	SourceType string
+	NamedIndex struct {
+		Index v1.ImageIndex
+		Name  string
+	}
+)
 
 type AttestationOptions struct {
 	NoReferrers   bool