| // Copyright 2015 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 common |
| |
| import ( |
| "github.com/google/blueprint" |
| "github.com/google/blueprint/proptools" |
| ) |
| |
| type defaultsProperties struct { |
| Defaults []string |
| } |
| |
| type DefaultableModule struct { |
| defaultsProperties defaultsProperties |
| defaultableProperties []interface{} |
| } |
| |
| func (d *DefaultableModule) defaults() *defaultsProperties { |
| return &d.defaultsProperties |
| } |
| |
| func (d *DefaultableModule) setProperties(props []interface{}) { |
| d.defaultableProperties = props |
| } |
| |
| type Defaultable interface { |
| defaults() *defaultsProperties |
| setProperties([]interface{}) |
| applyDefaults(AndroidTopDownMutatorContext, Defaults) |
| } |
| |
| var _ Defaultable = (*DefaultableModule)(nil) |
| |
| func InitDefaultableModule(module AndroidModule, d Defaultable, |
| props ...interface{}) (blueprint.Module, []interface{}) { |
| |
| d.setProperties(props) |
| |
| props = append(props, d.defaults()) |
| |
| return module, props |
| } |
| |
| type DefaultsModule struct { |
| defaultProperties []interface{} |
| } |
| |
| type Defaults interface { |
| isDefaults() bool |
| setProperties([]interface{}) |
| properties() []interface{} |
| } |
| |
| func (d *DefaultsModule) isDefaults() bool { |
| return true |
| } |
| |
| func (d *DefaultsModule) properties() []interface{} { |
| return d.defaultProperties |
| } |
| |
| func (d *DefaultsModule) setProperties(props []interface{}) { |
| d.defaultProperties = props |
| } |
| |
| func InitDefaultsModule(module AndroidModule, d Defaults, props ...interface{}) (blueprint.Module, []interface{}) { |
| d.setProperties(props) |
| |
| return module, props |
| } |
| |
| var _ Defaults = (*DefaultsModule)(nil) |
| |
| func (defaultable *DefaultableModule) applyDefaults(ctx AndroidTopDownMutatorContext, |
| defaults Defaults) { |
| |
| for _, prop := range defaultable.defaultableProperties { |
| for _, def := range defaults.properties() { |
| if proptools.TypeEqual(prop, def) { |
| err := proptools.PrependProperties(prop, def, nil) |
| if err != nil { |
| if propertyErr, ok := err.(*proptools.ExtendPropertyError); ok { |
| ctx.PropertyErrorf(propertyErr.Property, "%s", propertyErr.Err.Error()) |
| } else { |
| panic(err) |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| func defaultsDepsMutator(ctx AndroidBottomUpMutatorContext) { |
| if defaultable, ok := ctx.Module().(Defaultable); ok { |
| ctx.AddDependency(ctx.Module(), defaultable.defaults().Defaults...) |
| } |
| } |
| |
| func defaultsMutator(ctx AndroidTopDownMutatorContext) { |
| if defaultable, ok := ctx.Module().(Defaultable); ok { |
| for _, defaultsDep := range defaultable.defaults().Defaults { |
| ctx.VisitDirectDeps(func(m blueprint.Module) { |
| if ctx.OtherModuleName(m) == defaultsDep { |
| if defaultsModule, ok := m.(Defaults); ok { |
| defaultable.applyDefaults(ctx, defaultsModule) |
| } else { |
| ctx.PropertyErrorf("defaults", "module %s is not an defaults module", |
| ctx.OtherModuleName(m)) |
| } |
| } |
| }) |
| } |
| } |
| } |