// applyPatch reads the latest version of the object, writes it to version, then attempts to merge
// the changes onto it without conflict. If a conflict occurs jsonmerge.IsConflicting(err) is
// true. The info object is mutated
func applyPatch(delta *jsonmerge.Delta, info *resource.Info, version string) error {
if err := info.Get(); err != nil {
return patchError{err}
}
obj, err := resource.AsVersionedObject([]*resource.Info{info}, false, version)
if err != nil {
return patchError{err}
}
data, err := info.Mapping.Codec.Encode(obj)
if err != nil {
return patchError{err}
}
merged, err := delta.Apply(data)
if err != nil {
return patchError{err}
}
mergedObj, err := info.Mapping.Codec.Decode(merged)
if err != nil {
return patchError{err}
}
updated, err := resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, mergedObj)
if err != nil {
return err
}
info.Refresh(updated, true)
return nil
}
// waitForObjectDeletion refreshes the object, waiting until it is deleted, a timeout is reached, or
// an error is encountered. It checks once a second.
func waitForObjectDeletion(info *resource.Info, timeout time.Duration) error {
copied := *info
info = &copied
// TODO: refactor Reaper so that we can pass the "wait" option into it, and then check for UID change.
return wait.PollImmediate(objectDeletionWaitInterval, timeout, func() (bool, error) {
switch err := info.Get(); {
case err == nil:
return false, nil
case errors.IsNotFound(err):
return true, nil
default:
return false, err
}
})
}
// DefaultRetriable adds retry information to the provided error, and will refresh the
// info if the client info is stale. If the refresh fails the error is made fatal.
// All other errors are left in their natural state - they will not be retried unless
// they define a Temporary() method that returns true.
func DefaultRetriable(info *resource.Info, err error) error {
if err == nil {
return nil
}
switch {
case errors.IsMethodNotSupported(err):
return ErrNotRetriable{err}
case errors.IsConflict(err):
if refreshErr := info.Get(); refreshErr != nil {
return ErrNotRetriable{err}
}
return ErrRetriable{err}
case errors.IsServerTimeout(err):
return ErrRetriable{err}
}
return err
}
