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Content store writer checks expected

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Fixes #1004

Signed-off-by: Derek McGowan <derek@mcgstyle.net>
This commit is contained in:
Derek McGowan 2017-06-14 14:54:13 -07:00
parent 6bbed2c125
commit 38c3cc71de
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1 changed files with 7 additions and 1 deletions
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8
content/store.go
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@ -227,8 +227,14 @@ func (s *store) total(ingestPath string) int64 {
//
// The argument `ref` is used to uniquely identify a long-lived writer transaction.
func (s *store) Writer(ctx context.Context, ref string, total int64, expected digest.Digest) (Writer, error) {
// TODO(stevvooe): Need to actually store and handle expected here. We have
// TODO(stevvooe): Need to actually store expected here. We have
// code in the service that shouldn't be dealing with this.
if expected != "" {
p := s.blobPath(expected)
if _, err := os.Stat(p); err == nil {
return nil, ErrExists
}
}
path, refp, data := s.ingestPaths(ref)