146 lines
3.7 KiB
Go
146 lines
3.7 KiB
Go
// Copyright 2015 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 (
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"github.com/google/blueprint"
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"github.com/google/blueprint/proptools"
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)
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type defaultsDependencyTag struct {
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blueprint.BaseDependencyTag
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}
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var DefaultsDepTag defaultsDependencyTag
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type defaultsProperties struct {
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Defaults []string
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}
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type DefaultableModule struct {
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defaultsProperties defaultsProperties
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defaultableProperties []interface{}
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}
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func (d *DefaultableModule) defaults() *defaultsProperties {
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return &d.defaultsProperties
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}
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func (d *DefaultableModule) setProperties(props []interface{}) {
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d.defaultableProperties = props
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}
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type Defaultable interface {
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defaults() *defaultsProperties
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setProperties([]interface{})
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applyDefaults(TopDownMutatorContext, []Defaults)
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}
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var _ Defaultable = (*DefaultableModule)(nil)
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func InitDefaultableModule(module Module, d Defaultable,
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props ...interface{}) (blueprint.Module, []interface{}) {
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d.setProperties(props)
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props = append(props, d.defaults())
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return module, props
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}
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type DefaultsModule struct {
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DefaultableModule
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defaultProperties []interface{}
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}
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type Defaults interface {
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Defaultable
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isDefaults() bool
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properties() []interface{}
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}
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func (d *DefaultsModule) isDefaults() bool {
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return true
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}
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func (d *DefaultsModule) properties() []interface{} {
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return d.defaultableProperties
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}
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func InitDefaultsModule(module Module, d Defaults, props ...interface{}) (blueprint.Module, []interface{}) {
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props = append(props,
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&hostAndDeviceProperties{},
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&commonProperties{},
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&variableProperties{})
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_, props = InitArchModule(module, props...)
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_, props = InitDefaultableModule(module, d, props...)
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props = append(props, &module.base().nameProperties)
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module.base().module = module
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return module, props
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}
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var _ Defaults = (*DefaultsModule)(nil)
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func (defaultable *DefaultableModule) applyDefaults(ctx TopDownMutatorContext,
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defaultsList []Defaults) {
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for _, defaults := range defaultsList {
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for _, prop := range defaultable.defaultableProperties {
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for _, def := range defaults.properties() {
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if proptools.TypeEqual(prop, def) {
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err := proptools.PrependProperties(prop, def, nil)
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if err != nil {
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if propertyErr, ok := err.(*proptools.ExtendPropertyError); ok {
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ctx.PropertyErrorf(propertyErr.Property, "%s", propertyErr.Err.Error())
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} else {
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panic(err)
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}
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}
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}
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}
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}
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}
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}
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func defaultsDepsMutator(ctx BottomUpMutatorContext) {
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if defaultable, ok := ctx.Module().(Defaultable); ok {
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ctx.AddDependency(ctx.Module(), DefaultsDepTag, defaultable.defaults().Defaults...)
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}
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}
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func defaultsMutator(ctx TopDownMutatorContext) {
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if defaultable, ok := ctx.Module().(Defaultable); ok && len(defaultable.defaults().Defaults) > 0 {
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var defaultsList []Defaults
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ctx.WalkDeps(func(module, parent blueprint.Module) bool {
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if ctx.OtherModuleDependencyTag(module) == DefaultsDepTag {
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if defaults, ok := module.(Defaults); ok {
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defaultsList = append(defaultsList, defaults)
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return len(defaults.defaults().Defaults) > 0
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} else {
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ctx.PropertyErrorf("defaults", "module %s is not an defaults module",
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ctx.OtherModuleName(module))
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}
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}
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return false
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})
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defaultable.applyDefaults(ctx, defaultsList)
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}
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}
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