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repository: remove unused DownloadAndHash
This commit is contained in:
Michael Eischer
parent
f1e58e7c7f
commit
becebf5d88
@ -17,13 +17,10 @@ import (
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"github.com/restic/restic/internal/crypto"
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"github.com/restic/restic/internal/debug"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/fs"
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"github.com/restic/restic/internal/hashing"
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"github.com/restic/restic/internal/pack"
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"github.com/restic/restic/internal/restic"
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"github.com/restic/restic/internal/ui/progress"
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"github.com/minio/sha256-simd"
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"golang.org/x/sync/errgroup"
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)
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@ -746,47 +743,6 @@ type Loader interface {
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Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error
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}
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// DownloadAndHash is all-in-one helper to download content of the file at h to a temporary filesystem location
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// and calculate ID of the contents. Returned (temporary) file is positioned at the beginning of the file;
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// it is the reponsibility of the caller to close and delete the file.
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func DownloadAndHash(ctx context.Context, be Loader, h restic.Handle) (tmpfile *os.File, hash restic.ID, size int64, err error) {
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tmpfile, err = fs.TempFile("", "restic-temp-")
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if err != nil {
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return nil, restic.ID{}, -1, errors.Wrap(err, "TempFile")
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}
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err = be.Load(ctx, h, 0, 0, func(rd io.Reader) (ierr error) {
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_, ierr = tmpfile.Seek(0, io.SeekStart)
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if ierr == nil {
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ierr = tmpfile.Truncate(0)
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}
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if ierr != nil {
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return ierr
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}
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hrd := hashing.NewReader(rd, sha256.New())
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size, ierr = io.Copy(tmpfile, hrd)
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hash = restic.IDFromHash(hrd.Sum(nil))
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return ierr
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})
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if err != nil {
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// ignore subsequent errors
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_ = tmpfile.Close()
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_ = os.Remove(tmpfile.Name())
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return nil, restic.ID{}, -1, errors.Wrap(err, "Load")
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}
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_, err = tmpfile.Seek(0, io.SeekStart)
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if err != nil {
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// ignore subsequent errors
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_ = tmpfile.Close()
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_ = os.Remove(tmpfile.Name())
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return nil, restic.ID{}, -1, errors.Wrap(err, "Seek")
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}
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return tmpfile, hash, size, err
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}
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type BackendLoadFn func(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error
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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 {
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@ -13,8 +13,6 @@ import (
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"time"
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"github.com/restic/restic/internal/archiver"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/fs"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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rtest "github.com/restic/restic/internal/test"
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@ -411,107 +409,3 @@ func TestRepositoryIncrementalIndex(t *testing.T) {
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}
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}
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}
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type backend struct {
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rd io.Reader
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}
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func (be backend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
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return fn(be.rd)
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}
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type retryBackend struct {
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buf []byte
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}
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func (be retryBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
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err := fn(bytes.NewReader(be.buf[:len(be.buf)/2]))
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if err != nil {
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return err
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}
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return fn(bytes.NewReader(be.buf))
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}
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func TestDownloadAndHash(t *testing.T) {
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buf := make([]byte, 5*1024*1024+881)
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_, err := io.ReadFull(rnd, buf)
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if err != nil {
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t.Fatal(err)
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}
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var tests = []struct {
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be repository.Loader
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want []byte
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}{
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{
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be: backend{rd: bytes.NewReader(buf)},
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want: buf,
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},
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{
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be: retryBackend{buf: buf},
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want: buf,
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},
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}
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for _, test := range tests {
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t.Run("", func(t *testing.T) {
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f, id, size, err := repository.DownloadAndHash(context.TODO(), test.be, restic.Handle{})
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if err != nil {
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t.Error(err)
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}
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want := restic.Hash(test.want)
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if !want.Equal(id) {
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t.Errorf("wrong hash returned, want %v, got %v", want.Str(), id.Str())
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}
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if size != int64(len(test.want)) {
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t.Errorf("wrong size returned, want %v, got %v", test.want, size)
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}
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err = f.Close()
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if err != nil {
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t.Error(err)
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}
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err = fs.RemoveIfExists(f.Name())
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if err != nil {
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t.Fatal(err)
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}
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})
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}
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}
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type errorReader struct {
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err error
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}
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func (er errorReader) Read(p []byte) (n int, err error) {
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return 0, er.err
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}
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func TestDownloadAndHashErrors(t *testing.T) {
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var tests = []struct {
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be repository.Loader
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err string
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}{
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{
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be: backend{rd: errorReader{errors.New("test error 1")}},
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err: "test error 1",
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},
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}
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for _, test := range tests {
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t.Run("", func(t *testing.T) {
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_, _, _, err := repository.DownloadAndHash(context.TODO(), test.be, restic.Handle{})
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if err == nil {
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t.Fatalf("wanted error %q, got nil", test.err)
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}
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if errors.Cause(err).Error() != test.err {
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t.Fatalf("wanted error %q, got %q", test.err, err)
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}
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})
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}
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}
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