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googlecloudstorage: add --gcs-no-check-bucket to minimise transactions and perms

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Adds a configuration option to the GCS backend to allow skipping the
check if a bucket exists before copying an object to it, much like
f406dbb added for S3.
This commit is contained in:
Nick Gooding 2022-04-12 20:16:05 +01:00 committed by Nick Craig-Wood
parent 240561850b
commit 25146b4306
1 changed files with 20 additions and 2 deletions
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22
backend/googlecloudstorage/googlecloudstorage.go
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@ -295,6 +295,15 @@ Docs: https://cloud.google.com/storage/docs/bucket-policy-only
Value: "DURABLE_REDUCED_AVAILABILITY",
Help: "Durable reduced availability storage class",
}},
}, {
Name: "no_check_bucket",
Help: `If set, don't attempt to check the bucket exists or create it.
This can be useful when trying to minimise the number of transactions
rclone does if you know the bucket exists already.
`,
Default: false,
Advanced: true,
}, {
Name: config.ConfigEncoding,
Help: config.ConfigEncodingHelp,
@ -317,6 +326,7 @@ type Options struct {
BucketPolicyOnly bool `config:"bucket_policy_only"`
Location string `config:"location"`
StorageClass string `config:"storage_class"`
NoCheckBucket bool `config:"no_check_bucket"`
Enc encoder.MultiEncoder `config:"encoding"`
}
@ -840,6 +850,14 @@ func (f *Fs) makeBucket(ctx context.Context, bucket string) (err error) {
}, nil)
}
// checkBucket creates the bucket if it doesn't exist unless NoCheckBucket is true
func (f *Fs) checkBucket(ctx context.Context, bucket string) error {
if f.opt.NoCheckBucket {
return nil
}
return f.makeBucket(ctx, bucket)
}
// Rmdir deletes the bucket if the fs is at the root
//
// Returns an error if it isn't empty: Error 409: The bucket you tried
@ -873,7 +891,7 @@ func (f *Fs) Precision() time.Duration {
// If it isn't possible then return fs.ErrorCantCopy
func (f *Fs) Copy(ctx context.Context, src fs.Object, remote string) (fs.Object, error) {
dstBucket, dstPath := f.split(remote)
err := f.makeBucket(ctx, dstBucket)
err := f.checkBucket(ctx, dstBucket)
if err != nil {
return nil, err
}
@ -1123,7 +1141,7 @@ func (o *Object) Open(ctx context.Context, options ...fs.OpenOption) (in io.Read
// The new object may have been created if an error is returned
func (o *Object) Update(ctx context.Context, in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) error {
bucket, bucketPath := o.split()
err := o.fs.makeBucket(ctx, bucket)
err := o.fs.checkBucket(ctx, bucket)
if err != nil {
return err
}