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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 android
import (
"github.com/google/blueprint"
"github.com/google/blueprint/proptools"
)
type defaultsDependencyTag struct {
blueprint.BaseDependencyTag
}
var DefaultsDepTag defaultsDependencyTag
type defaultsProperties struct {
Defaults []string
}
type DefaultableModuleBase struct {
defaultsProperties defaultsProperties
defaultableProperties []interface{}
}
func (d *DefaultableModuleBase) defaults() *defaultsProperties {
return &d.defaultsProperties
}
func (d *DefaultableModuleBase) setProperties(props []interface{}) {
d.defaultableProperties = props
}
type Defaultable interface {
defaults() *defaultsProperties
setProperties([]interface{})
applyDefaults(TopDownMutatorContext, []Defaults)
}
type DefaultableModule interface {
Module
Defaultable
}
var _ Defaultable = (*DefaultableModuleBase)(nil)
func InitDefaultableModule(module DefaultableModule) {
module.(Defaultable).setProperties(module.(Module).GetProperties())
module.AddProperties(module.defaults())
}
type DefaultsModuleBase struct {
DefaultableModuleBase
defaultProperties []interface{}
}
type Defaults interface {
Defaultable
isDefaults() bool
properties() []interface{}
}
func (d *DefaultsModuleBase) isDefaults() bool {
return true
}
func (d *DefaultsModuleBase) properties() []interface{} {
return d.defaultableProperties
}
func InitDefaultsModule(module DefaultableModule) {
module.AddProperties(
&hostAndDeviceProperties{},
&commonProperties{},
&variableProperties{})
InitArchModule(module)
InitDefaultableModule(module)
module.AddProperties(&module.base().nameProperties)
module.base().module = module
}
var _ Defaults = (*DefaultsModuleBase)(nil)
func (defaultable *DefaultableModuleBase) applyDefaults(ctx TopDownMutatorContext,
defaultsList []Defaults) {
for _, defaults := range defaultsList {
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 RegisterDefaultsPreArchMutators(ctx RegisterMutatorsContext) {
ctx.BottomUp("defaults_deps", defaultsDepsMutator).Parallel()
ctx.TopDown("defaults", defaultsMutator).Parallel()
}
func defaultsDepsMutator(ctx BottomUpMutatorContext) {
if defaultable, ok := ctx.Module().(Defaultable); ok {
ctx.AddDependency(ctx.Module(), DefaultsDepTag, defaultable.defaults().Defaults...)
}
}
func defaultsMutator(ctx TopDownMutatorContext) {
if defaultable, ok := ctx.Module().(Defaultable); ok && len(defaultable.defaults().Defaults) > 0 {
var defaultsList []Defaults
seen := make(map[Defaults]bool)
ctx.WalkDeps(func(module, parent Module) bool {
if ctx.OtherModuleDependencyTag(module) == DefaultsDepTag {
if defaults, ok := module.(Defaults); ok {
if !seen[defaults] {
seen[defaults] = true
defaultsList = append(defaultsList, defaults)
return len(defaults.defaults().Defaults) > 0
}
} else {
ctx.PropertyErrorf("defaults", "module %s is not an defaults module",
ctx.OtherModuleName(module))
}
}
return false
})
defaultable.applyDefaults(ctx, defaultsList)
}
}
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