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Remove tarsum support for digest package

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tarsum is not actually used by the registry. Remove support for it.

Convert numerous uses in unit tests to SHA256.

Update docs to remove mentions of tarsums (which were often inaccurate).

Remove tarsum dependency.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2015-12-15 17:18:13 -08:00
parent 200cbe8b8e
commit 4c850e7165
47 changed files with 90 additions and 2358 deletions
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27
testutil/tarfile.go
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@ -6,17 +6,16 @@ import (
"crypto/rand"
"fmt"
"io"
"io/ioutil"
mrand "math/rand"
"time"
"github.com/docker/docker/pkg/tarsum"
"github.com/docker/distribution/digest"
)
// CreateRandomTarFile creates a random tarfile, returning it as an
// io.ReadSeeker along with its tarsum. An error is returned if there is a
// io.ReadSeeker along with its digest. An error is returned if there is a
// problem generating valid content.
func CreateRandomTarFile() (rs io.ReadSeeker, tarSum string, err error) {
func CreateRandomTarFile() (rs io.ReadSeeker, dgst digest.Digest, err error) {
nFiles := mrand.Intn(10) + 10
target := &bytes.Buffer{}
wr := tar.NewWriter(target)
@ -73,23 +72,7 @@ func CreateRandomTarFile() (rs io.ReadSeeker, tarSum string, err error) {
return nil, "", err
}
reader := bytes.NewReader(target.Bytes())
dgst = digest.FromBytes(target.Bytes())
// A tar builder that supports tarsum inline calculation would be awesome
// here.
ts, err := tarsum.NewTarSum(reader, true, tarsum.Version1)
if err != nil {
return nil, "", err
}
nn, err := io.Copy(ioutil.Discard, ts)
if nn != int64(len(target.Bytes())) {
return nil, "", fmt.Errorf("short copy when getting tarsum of random layer: %v != %v", nn, len(target.Bytes()))
}
if err != nil {
return nil, "", err
}
return bytes.NewReader(target.Bytes()), ts.Sum(nil), nil
return bytes.NewReader(target.Bytes()), dgst, nil
}