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local: fix "file not found" errors on post transfer Hash calculation

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Before this change the local backend was returning file not found
errors for post transfer hashes for files which were moved. This was
caused by the routine which checks for the object being changed.

After this change we ignore file not found errors while checking to
see if the object has changed. If the hash has to be computed then a
file not found error will be thrown when it is opened, otherwise the
cached hash will be returned.
This commit is contained in:
Nick Craig-Wood 2020-05-04 12:17:46 +01:00
parent 69888bf966
commit 14cab0fff0
1 changed files with 11 additions and 2 deletions
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13
backend/local/local.go
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@ -768,8 +768,17 @@ func (o *Object) Hash(ctx context.Context, r hash.Type) (string, error) {
oldtime := o.modTime
oldsize := o.size
err := o.lstat()
var changed bool
if err != nil {
return "", errors.Wrap(err, "hash: failed to stat")
if os.IsNotExist(errors.Cause(err)) {
// If file not found then we assume any accumulated
// hashes are OK - this will error on Open
changed = true
} else {
return "", errors.Wrap(err, "hash: failed to stat")
}
} else {
changed = !o.modTime.Equal(oldtime) || oldsize != o.size
}
o.fs.objectHashesMu.Lock()
@ -777,7 +786,7 @@ func (o *Object) Hash(ctx context.Context, r hash.Type) (string, error) {
hashValue, hashFound := o.hashes[r]
o.fs.objectHashesMu.Unlock()
if !o.modTime.Equal(oldtime) || oldsize != o.size || hashes == nil || !hashFound {
if changed || hashes == nil || !hashFound {
var in io.ReadCloser
if !o.translatedLink {