repository: remove unused DownloadAndHash

internal/repository/repository.go

@@ -17,13 +17,10 @@ import (
 	"github.com/restic/restic/internal/crypto"
 	"github.com/restic/restic/internal/debug"
 	"github.com/restic/restic/internal/errors"
-	"github.com/restic/restic/internal/fs"
-	"github.com/restic/restic/internal/hashing"
 	"github.com/restic/restic/internal/pack"
 	"github.com/restic/restic/internal/restic"
 	"github.com/restic/restic/internal/ui/progress"
 
-	"github.com/minio/sha256-simd"
 	"golang.org/x/sync/errgroup"
 )
 
@@ -746,47 +743,6 @@ type Loader interface {
 	Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error
 }
 
-// DownloadAndHash is all-in-one helper to download content of the file at h to a temporary filesystem location
-// and calculate ID of the contents. Returned (temporary) file is positioned at the beginning of the file;
-// it is the reponsibility of the caller to close and delete the file.
-func DownloadAndHash(ctx context.Context, be Loader, h restic.Handle) (tmpfile *os.File, hash restic.ID, size int64, err error) {
-	tmpfile, err = fs.TempFile("", "restic-temp-")
-	if err != nil {
-		return nil, restic.ID{}, -1, errors.Wrap(err, "TempFile")
-	}
-
-	err = be.Load(ctx, h, 0, 0, func(rd io.Reader) (ierr error) {
-		_, ierr = tmpfile.Seek(0, io.SeekStart)
-		if ierr == nil {
-			ierr = tmpfile.Truncate(0)
-		}
-		if ierr != nil {
-			return ierr
-		}
-		hrd := hashing.NewReader(rd, sha256.New())
-		size, ierr = io.Copy(tmpfile, hrd)
-		hash = restic.IDFromHash(hrd.Sum(nil))
-		return ierr
-	})
-
-	if err != nil {
-		// ignore subsequent errors
-		_ = tmpfile.Close()
-		_ = os.Remove(tmpfile.Name())
-		return nil, restic.ID{}, -1, errors.Wrap(err, "Load")
-	}
-
-	_, err = tmpfile.Seek(0, io.SeekStart)
-	if err != nil {
-		// ignore subsequent errors
-		_ = tmpfile.Close()
-		_ = os.Remove(tmpfile.Name())
-		return nil, restic.ID{}, -1, errors.Wrap(err, "Seek")
-	}
-
-	return tmpfile, hash, size, err
-}
-
 type BackendLoadFn func(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error
 
 func StreamPack(ctx context.Context, beLoad BackendLoadFn, key *crypto.Key, packID restic.ID, blobs []restic.Blob, handleBlobFn func(blob restic.BlobHandle, buf []byte, err error) error) error {