55 lines
1.8 KiB
Go
55 lines
1.8 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package deploy
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/pulumi/pulumi/sdk/v3/go/common/tokens"
|
|
"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
|
|
"github.com/pulumi/pulumi/sdk/v3/go/common/util/result"
|
|
)
|
|
|
|
// NullSource is a singleton source that never returns any resources. This may be used in scenarios where the "new"
|
|
// version of the world is meant to be empty, either for testing purposes, or removal of an existing stack.
|
|
var NullSource Source = &nullSource{}
|
|
|
|
// A nullSource never returns any resources.
|
|
type nullSource struct {
|
|
}
|
|
|
|
func (src *nullSource) Close() error { return nil }
|
|
func (src *nullSource) Project() tokens.PackageName { return "" }
|
|
func (src *nullSource) Info() interface{} { return nil }
|
|
|
|
func (src *nullSource) Iterate(
|
|
ctx context.Context, opts Options, providers ProviderSource) (SourceIterator, result.Result) {
|
|
|
|
contract.Ignore(ctx)
|
|
return &nullSourceIterator{}, nil
|
|
}
|
|
|
|
// nullSourceIterator always returns nil, nil in response to Next, indicating that it is done.
|
|
type nullSourceIterator struct {
|
|
}
|
|
|
|
func (iter *nullSourceIterator) Close() error {
|
|
return nil // nothing to do.
|
|
}
|
|
|
|
func (iter *nullSourceIterator) Next() (SourceEvent, result.Result) {
|
|
return nil, nil // means "done"
|
|
}
|