e1a52693dc
A resource can be imported by setting the `import` property in the resource options bag when instantiating a resource. In order to successfully import a resource, its desired configuration (i.e. its inputs) must not differ from its actual configuration (i.e. its state) as calculated by the resource's provider. There are a few interesting state transitions hiding here when importing a resource: 1. No prior resource exists in the checkpoint file. In this case, the resource is simply imported. 2. An external resource exists in the checkpoint file. In this case, the resource is imported and the old external state is discarded. 3. A non-external resource exists in the checkpoint file and its ID is different from the ID to import. In this case, the new resource is imported and the old resource is deleted. 4. A non-external resource exists in the checkpoint file, but the ID is the same as the ID to import. In this case, the import ID is ignored and the resource is treated as it would be in all cases except for changes that would replace the resource. In that case, the step generator issues an error that indicates that the import ID should be removed: were we to move forward with the replace, the new state of the stack would fall under case (3), which is almost certainly not what the user intends. Fixes #1662.
44 lines
1.7 KiB
Go
44 lines
1.7 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package resource
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// OperationType is the type of operations issued by the engine.
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type OperationType string
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const (
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// OperationTypeCreating is the state of resources that are being created.
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OperationTypeCreating OperationType = "creating"
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// OperationTypeUpdating is the state of resources that are being updated.
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OperationTypeUpdating OperationType = "updating"
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// OperationTypeDeleting is the state of resources that are being deleted.
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OperationTypeDeleting OperationType = "deleting"
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// OperationTypeReading is the state of resources that are being read.
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OperationTypeReading OperationType = "reading"
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// OperationTypeImporting is the state of resources that are being imported.
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OperationTypeImporting OperationType = "importing"
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)
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// Operation represents an operation that the engine has initiated but has not yet completed. It is
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// essentially just a tuple of a resource and a string identifying the operation.
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type Operation struct {
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Resource *State
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Type OperationType
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}
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// NewOperation constructs a new Operation from a state and an operation name.
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func NewOperation(state *State, op OperationType) Operation {
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return Operation{state, op}
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}
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