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// Copyright (C) 2019 The Android Open Source Project
//
// 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 sdk
import (
"fmt"
"android/soong/android"
)
type bpPropertySet struct {
properties map[string]interface{}
tags map[string]android.BpPropertyTag
order []string
}
var _ android.BpPropertySet = (*bpPropertySet)(nil)
func (s *bpPropertySet) init() {
s.properties = make(map[string]interface{})
s.tags = make(map[string]android.BpPropertyTag)
}
func (s *bpPropertySet) AddProperty(name string, value interface{}) {
if s.properties[name] != nil {
panic("Property %q already exists in property set")
}
s.properties[name] = value
s.order = append(s.order, name)
}
func (s *bpPropertySet) AddPropertyWithTag(name string, value interface{}, tag android.BpPropertyTag) {
s.AddProperty(name, value)
s.tags[name] = tag
}
func (s *bpPropertySet) AddPropertySet(name string) android.BpPropertySet {
set := &bpPropertySet{}
set.init()
s.AddProperty(name, set)
return set
}
func (s *bpPropertySet) getValue(name string) interface{} {
return s.properties[name]
}
func (s *bpPropertySet) getTag(name string) interface{} {
return s.tags[name]
}
func (s *bpPropertySet) transform(transformer bpPropertyTransformer) {
var newOrder []string
for _, name := range s.order {
value := s.properties[name]
tag := s.tags[name]
var newValue interface{}
var newTag android.BpPropertyTag
if propertySet, ok := value.(*bpPropertySet); ok {
newValue, newTag = transformer.transformPropertySet(name, propertySet, tag)
} else {
newValue, newTag = transformer.transformProperty(name, value, tag)
}
if newValue == nil {
// Delete the property from the map and exclude it from the new order.
delete(s.properties, name)
} else {
// Update the property in the map and add the name to the new order list.
s.properties[name] = newValue
s.tags[name] = newTag
newOrder = append(newOrder, name)
}
}
s.order = newOrder
}
func (s *bpPropertySet) setProperty(name string, value interface{}) {
if s.properties[name] == nil {
s.AddProperty(name, value)
} else {
s.properties[name] = value
s.tags[name] = nil
}
}
func (s *bpPropertySet) insertAfter(position string, name string, value interface{}) {
if s.properties[name] != nil {
panic("Property %q already exists in property set")
}
// Add the name to the end of the order, to ensure it has necessary capacity
// and to handle the case when the position does not exist.
s.order = append(s.order, name)
// Search through the order for the item that matches supplied position. If
// found then insert the name of the new property after it.
for i, v := range s.order {
if v == position {
// Copy the items after the one where the new property should be inserted.
copy(s.order[i+2:], s.order[i+1:])
// Insert the item in the list.
s.order[i+1] = name
}
}
s.properties[name] = value
}
type bpModule struct {
*bpPropertySet
moduleType string
}
var _ android.BpModule = (*bpModule)(nil)
type bpPropertyTransformer interface {
// Transform the property set, returning the new property set/tag to insert back into the
// parent property set (or module if this is the top level property set).
//
// This will be called before transforming the properties in the supplied set.
//
// The name will be "" for the top level property set.
//
// Returning (nil, ...) will cause the property set to be removed.
transformPropertySet(name string, propertySet *bpPropertySet, tag android.BpPropertyTag) (*bpPropertySet, android.BpPropertyTag)
// Transform a property, return the new value/tag to insert back into the property set.
//
// Returning (nil, ...) will cause the property to be removed.
transformProperty(name string, value interface{}, tag android.BpPropertyTag) (interface{}, android.BpPropertyTag)
}
// Interface for transforming bpModule objects.
type bpTransformer interface {
// Transform the module, returning the result.
//
// The method can either create a new module and return that, or modify the supplied module
// in place and return that.
//
// After this returns the transformer is applied to the contents of the returned module.
transformModule(module *bpModule) *bpModule
bpPropertyTransformer
}
type identityTransformation struct{}
var _ bpTransformer = (*identityTransformation)(nil)
func (t identityTransformation) transformModule(module *bpModule) *bpModule {
return module
}
func (t identityTransformation) transformPropertySet(name string, propertySet *bpPropertySet, tag android.BpPropertyTag) (*bpPropertySet, android.BpPropertyTag) {
return propertySet, tag
}
func (t identityTransformation) transformProperty(name string, value interface{}, tag android.BpPropertyTag) (interface{}, android.BpPropertyTag) {
return value, tag
}
func (m *bpModule) deepCopy() *bpModule {
return m.transform(deepCopyTransformer)
}
func (m *bpModule) transform(transformer bpTransformer) *bpModule {
transformedModule := transformer.transformModule(m)
// Copy the contents of the returned property set into the module and then transform that.
transformedModule.bpPropertySet, _ = transformer.transformPropertySet("", transformedModule.bpPropertySet, nil)
transformedModule.bpPropertySet.transform(transformer)
return transformedModule
}
type deepCopyTransformation struct{}
func (t deepCopyTransformation) transformModule(module *bpModule) *bpModule {
// Take a shallow copy of the module. Any mutable property values will be copied by the
// transformer.
moduleCopy := *module
return &moduleCopy
}
func (t deepCopyTransformation) transformPropertySet(name string, propertySet *bpPropertySet, tag android.BpPropertyTag) (*bpPropertySet, android.BpPropertyTag) {
// Create a shallow copy of the properties map. Any mutable property values will be copied by the
// transformer.
propertiesCopy := make(map[string]interface{})
for propertyName, value := range propertySet.properties {
propertiesCopy[propertyName] = value
}
// Ditto for tags map.
tagsCopy := make(map[string]android.BpPropertyTag)
for propertyName, propertyTag := range propertySet.tags {
tagsCopy[propertyName] = propertyTag
}
// Create a new property set.
return &bpPropertySet{
properties: propertiesCopy,
tags: tagsCopy,
order: append([]string(nil), propertySet.order...),
}, tag
}
func (t deepCopyTransformation) transformProperty(name string, value interface{}, tag android.BpPropertyTag) (interface{}, android.BpPropertyTag) {
// Copy string slice, otherwise return value.
if values, ok := value.([]string); ok {
valuesCopy := make([]string, len(values))
copy(valuesCopy, values)
return valuesCopy, tag
}
return value, tag
}
var deepCopyTransformer bpTransformer = deepCopyTransformation{}
// A .bp file
type bpFile struct {
modules map[string]*bpModule
order []*bpModule
}
// Add a module.
//
// The module must have had its "name" property set to a string value that
// is unique within this file.
func (f *bpFile) AddModule(module android.BpModule) {
m := module.(*bpModule)
if name, ok := m.getValue("name").(string); ok {
if f.modules[name] != nil {
panic(fmt.Sprintf("Module %q already exists in bp file", name))
}
f.modules[name] = m
f.order = append(f.order, m)
} else {
panic("Module does not have a name property, or it is not a string")
}
}
func (f *bpFile) newModule(moduleType string) *bpModule {
module := &bpModule{
moduleType: moduleType,
bpPropertySet: &bpPropertySet{},
}
module.bpPropertySet.init()
return module
}