mirror of https://github.com/pulumi/pulumi.git
49 lines
1.7 KiB
Go
49 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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"github.com/pulumi/pulumi/pkg/tokens"
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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) IsRefresh() bool { return false }
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func (src *nullSource) Iterate(opts Options) (SourceIterator, error) {
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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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