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TarSum: versioning

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This introduces Versions for TarSum checksums.
Fixes: https://github.com/docker/docker/issues/7526

It preserves current functionality and abstracts the interface for
future flexibility of hashing algorithms. As a POC, the VersionDev
Tarsum does not include the mtime in the checksum calculation, and would
solve https://github.com/docker/docker/issues/7387 though this is not a
settled Version is subject to change until a version number is assigned.

Signed-off-by: Vincent Batts <vbatts@redhat.com>
This commit is contained in:
Vincent Batts 2014-08-21 16:12:52 -04:00
parent 8440052689
commit 898bcf0f5d
1 changed files with 4 additions and 1 deletions
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5
docs/session.go
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@ -407,7 +407,10 @@ func (r *Session) PushImageLayerRegistry(imgID string, layer io.Reader, registry
log.Debugf("[registry] Calling PUT %s", registry+"images/"+imgID+"/layer")
tarsumLayer := &tarsum.TarSum{Reader: layer}
tarsumLayer, err := tarsum.NewTarSum(layer, false, tarsum.Version0)
if err != nil {
return "", "", err
}
h := sha256.New()
h.Write(jsonRaw)
h.Write([]byte{'\n'})