Cleanup local transfer interface

Signed-off-by: Derek McGowan <derek@mcg.dev>

core/transfer/local/pull.go

@@ -56,7 +56,7 @@ func (ts *localTransferService) pull(ctx context.Context, ir transfer.ImageFetch
 	}
 
 	// Verify image before pulling.
-	for vfName, vf := range ts.verifiers {
+	for vfName, vf := range ts.config.Verifiers {
 		log := log.G(ctx).WithFields(logrus.Fields{
 			"name":     name,
 			"digest":   desc.Digest.String(),

core/transfer/local/transfer.go

@@ -36,10 +36,8 @@ import (
 )
 
 type localTransferService struct {
-	leases    leases.Manager
-	content   content.Store
-	images    images.Store
-	verifiers map[string]imageverifier.ImageVerifier
+	content content.Store
+	images  images.Store
 	// limiter for upload
 	limiterU *semaphore.Weighted
 	// limiter for download operation
@@ -47,13 +45,11 @@ type localTransferService struct {
 	config   TransferConfig
 }
 
-func NewTransferService(lm leases.Manager, cs content.Store, is images.Store, vfs map[string]imageverifier.ImageVerifier, tc *TransferConfig) transfer.Transferrer {
+func NewTransferService(cs content.Store, is images.Store, tc TransferConfig) transfer.Transferrer {
 	ts := &localTransferService{
-		leases:    lm,
-		content:   cs,
-		images:    is,
-		verifiers: vfs,
-		config:    *tc,
+		content: cs,
+		images:  is,
+		config:  tc,
 	}
 	if tc.MaxConcurrentUploadedLayers > 0 {
 		ts.limiterU = semaphore.NewWeighted(int64(tc.MaxConcurrentUploadedLayers))
@@ -142,7 +138,10 @@ func (ts *localTransferService) withLease(ctx context.Context, opts ...leases.Op
 		return ctx, nop, nil
 	}
 
-	ls := ts.leases
+	ls := ts.config.Leases
+	if ls == nil {
+		return ctx, nop, nil
+	}
 
 	if len(opts) == 0 {
 		// Use default lease configuration if no options provided
@@ -164,6 +163,9 @@ func (ts *localTransferService) withLease(ctx context.Context, opts ...leases.Op
 }
 
 type TransferConfig struct {
+	// Leases manager is used to create leases during operations if none, exists
+	Leases leases.Manager
+
 	// MaxConcurrentDownloads is the max concurrent content downloads for pull.
 	MaxConcurrentDownloads int
 	// MaxConcurrentUploadedLayers is the max concurrent uploads for push
@@ -182,6 +184,9 @@ type TransferConfig struct {
 	// UnpackPlatforms are used to specify supported combination of platforms and snapshotters
 	UnpackPlatforms []unpack.Platform
 
+	// ImageVerifiers verify the image before saving into the image store.
+	Verifiers map[string]imageverifier.ImageVerifier
+
 	// RegistryConfigPath is a path to the root directory containing registry-specific configurations
 	RegistryConfigPath string
 }

plugins/transfer/plugin.go

@@ -57,23 +57,27 @@ func init() {
 				return nil, err
 			}
 			ms := m.(*metadata.DB)
+
+			var lc local.TransferConfig
+
 			l, err := ic.GetSingle(plugins.LeasePlugin)
 			if err != nil {
 				return nil, err
 			}
+			lc.Leases = l.(leases.Manager)
 
-			vfs := make(map[string]imageverifier.ImageVerifier)
 			vps, err := ic.GetByType(plugins.ImageVerifierPlugin)
 			if err != nil {
 				return nil, err
 			}
-
-			for name, vp := range vps {
-				vfs[name] = vp.(imageverifier.ImageVerifier)
+			if len(vps) > 0 {
+				lc.Verifiers = make(map[string]imageverifier.ImageVerifier)
+				for name, vp := range vps {
+					lc.Verifiers[name] = vp.(imageverifier.ImageVerifier)
+				}
 			}
 
 			// Set configuration based on default or user input
-			var lc local.TransferConfig
 			lc.MaxConcurrentDownloads = config.MaxConcurrentDownloads
 			lc.MaxConcurrentUploadedLayers = config.MaxConcurrentUploadedLayers
 
@@ -140,7 +144,7 @@ func init() {
 			}
 			lc.RegistryConfigPath = config.RegistryConfigPath
 
-			return local.NewTransferService(l.(leases.Manager), ms.ContentStore(), metadata.NewImageStore(ms), vfs, &lc), nil
+			return local.NewTransferService(ms.ContentStore(), metadata.NewImageStore(ms), lc), nil
 		},
 	})
 }