46 lines
1.8 KiB
Go
46 lines
1.8 KiB
Go
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// Copyright 2020 Google Inc. All rights reserved.
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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 android
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import "github.com/google/blueprint"
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// Dependency tags can implement this interface and return true from InstallDepNeeded to annotate
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// that the installed files of the parent should depend on the installed files of the child.
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type InstallNeededDependencyTag interface {
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// If InstallDepNeeded returns true then the installed files of the parent will depend on the
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// installed files of the child.
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InstallDepNeeded() bool
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}
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// Dependency tags can embed this struct to annotate that the installed files of the parent should
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// depend on the installed files of the child.
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type InstallAlwaysNeededDependencyTag struct{}
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func (i InstallAlwaysNeededDependencyTag) InstallDepNeeded() bool {
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return true
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}
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var _ InstallNeededDependencyTag = InstallAlwaysNeededDependencyTag{}
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// IsInstallDepNeeded returns true if the dependency tag implements the InstallNeededDependencyTag
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// interface and the InstallDepNeeded returns true, meaning that the installed files of the parent
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// should depend on the installed files of the child.
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func IsInstallDepNeeded(tag blueprint.DependencyTag) bool {
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if i, ok := tag.(InstallNeededDependencyTag); ok {
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return i.InstallDepNeeded()
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}
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return false
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}
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