73f4f2c464
Replace the Source-based implementation of refresh with a phase that runs as the first part of plan execution and rewrites the snapshot in-memory. In order to fit neatly within the existing framework for resource operations, these changes introduce a new kind of step, RefreshStep, to represent refreshes. RefreshSteps operate similar to ReadSteps but do not imply that the resource being read is not managed by Pulumi. In addition to the refresh reimplementation, these changes incorporate those from #1394 to run refresh in the integration test framework. Fixes #1598. Fixes pulumi/pulumi-terraform#165. Contributes to #1449.
52 lines
1.7 KiB
Go
52 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 deploy
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import (
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"context"
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"github.com/pulumi/pulumi/pkg/tokens"
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"github.com/pulumi/pulumi/pkg/util/contract"
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)
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// NullSource is a singleton source that never returns any resources. This may be used in scenarios where the "new"
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// version of the world is meant to be empty, either for testing purposes, or removal of an existing stack.
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var NullSource Source = &nullSource{}
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// A nullSource never returns any resources.
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type nullSource struct {
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}
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func (src *nullSource) Close() error { return nil }
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func (src *nullSource) Project() tokens.PackageName { return "" }
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func (src *nullSource) Info() interface{} { return nil }
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func (src *nullSource) Iterate(ctx context.Context, opts Options, providers ProviderSource) (SourceIterator, error) {
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contract.Ignore(ctx)
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return &nullSourceIterator{}, nil
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}
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// nullSourceIterator always returns nil, nil in response to Next, indicating that it is done.
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type nullSourceIterator struct {
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}
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func (iter *nullSourceIterator) Close() error {
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return nil // nothing to do.
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}
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func (iter *nullSourceIterator) Next() (SourceEvent, error) {
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return nil, nil // means "done"
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}
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