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