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// 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))
}
}
})
}
}
}
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