storagedriver/s3: Reverting a few changes from previous WalkFiles impl that was left in.

registry/storage/blobstore.go

@@ -94,6 +94,11 @@ func (bs *blobStore) Enumerate(ctx context.Context, ingester func(dgst digest.Di
 	}
 
 	return bs.driver.Walk(ctx, specPath, func(fileInfo driver.FileInfo) error {
+		// skip directories
+		if fileInfo.IsDir() {
+			return nil
+		}
+
 		currentPath := fileInfo.Path()
 		// we only want to parse paths that end with /data
 		_, fileName := path.Split(currentPath)

registry/storage/driver/azure/azure.go

@@ -360,7 +360,7 @@ func (d *driver) URLFor(ctx context.Context, path string, options map[string]int
 }
 
 // Walk traverses a filesystem defined within driver, starting
-// from the given path, calling f on each file and directory
+// from the given path, calling f on each file
 func (d *driver) Walk(ctx context.Context, path string, f storagedriver.WalkFn) error {
 	return storagedriver.WalkFallback(ctx, d, path, f)
 }

registry/storage/driver/filesystem/driver.go

@@ -290,7 +290,7 @@ func (d *driver) URLFor(ctx context.Context, path string, options map[string]int
 }
 
 // Walk traverses a filesystem defined within driver, starting
-// from the given path, calling f on each file and directory
+// from the given path, calling f on each file
 func (d *driver) Walk(ctx context.Context, path string, f storagedriver.WalkFn) error {
 	return storagedriver.WalkFallback(ctx, d, path, f)
 }

registry/storage/driver/inmemory/driver.go

@@ -245,7 +245,7 @@ func (d *driver) URLFor(ctx context.Context, path string, options map[string]int
 }
 
 // Walk traverses a filesystem defined within driver, starting
-// from the given path, calling f on each file and directory
+// from the given path, calling f on each file
 func (d *driver) Walk(ctx context.Context, path string, f storagedriver.WalkFn) error {
 	return storagedriver.WalkFallback(ctx, d, path, f)
 }

registry/storage/driver/swift/swift.go

@@ -658,7 +658,7 @@ func (d *driver) URLFor(ctx context.Context, path string, options map[string]int
 }
 
 // Walk traverses a filesystem defined within driver, starting
-// from the given path, calling f on each file and directory
+// from the given path, calling f on each file
 func (d *driver) Walk(ctx context.Context, path string, f storagedriver.WalkFn) error {
 	return storagedriver.WalkFallback(ctx, d, path, f)
 }

registry/storage/linkedblobstore.go

@@ -248,6 +248,10 @@ func (lbs *linkedBlobStore) Enumerate(ctx context.Context, ingestor func(digest.
 		return err
 	}
 	return lbs.driver.Walk(ctx, rootPath, func(fileInfo driver.FileInfo) error {
+		// exit early if directory...
+		if fileInfo.IsDir() {
+			return nil
+		}
 		filePath := fileInfo.Path()
 
 		// check if it's a link