ce75d2c6a2
Support prebuilt shared libraries as an initial proof-of-concept of prebuilts. Future changes will support binaries and static libraries, and the ability to select which to use based on something besides blueprint properties. Test: TestPrebuilts run during m -j Change-Id: I6e84da667e9005ae11844bad01d25cbe4ced1ce3
121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
// Copyright 2016 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 "github.com/google/blueprint"
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// This file implements common functionality for handling modules that may exist as prebuilts,
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// source, or both.
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var prebuiltDependencyTag blueprint.BaseDependencyTag
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func SourceModuleHasPrebuilt(ctx ModuleContext) OptionalPath {
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var path Path
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ctx.VisitDirectDeps(func(m blueprint.Module) {
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if ctx.OtherModuleDependencyTag(m) == prebuiltDependencyTag {
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p := m.(PrebuiltInterface).Prebuilt()
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if p.usePrebuilt(ctx) {
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path = p.Path(ctx)
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}
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}
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})
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return OptionalPathForPath(path)
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}
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type Prebuilt struct {
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Properties struct {
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Srcs []string `android:"arch_variant"`
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// When prefer is set to true the prebuilt will be used instead of any source module with
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// a matching name.
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Prefer bool `android:"arch_variant"`
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SourceExists bool `blueprint:"mutated"`
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}
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module Module
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}
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func (p *Prebuilt) Name(name string) string {
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return "prebuilt_" + name
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}
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func (p *Prebuilt) Path(ctx ModuleContext) Path {
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if len(p.Properties.Srcs) == 0 {
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ctx.PropertyErrorf("srcs", "missing prebuilt source file")
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return nil
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}
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if len(p.Properties.Srcs) > 1 {
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ctx.PropertyErrorf("srcs", "multiple prebuilt source files")
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return nil
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}
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return PathForModuleSrc(ctx, p.Properties.Srcs[0])
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}
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type PrebuiltInterface interface {
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Module
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Prebuilt() *Prebuilt
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}
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type PrebuiltSourceInterface interface {
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SkipInstall()
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}
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// prebuiltMutator ensures that there is always a module with an undecorated name, and marks
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// prebuilt modules that have both a prebuilt and a source module.
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func prebuiltMutator(ctx BottomUpMutatorContext) {
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if m, ok := ctx.Module().(PrebuiltInterface); ok && m.Prebuilt() != nil {
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p := m.Prebuilt()
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name := m.base().BaseModuleName()
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if ctx.OtherModuleExists(name) {
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ctx.AddReverseDependency(ctx.Module(), prebuiltDependencyTag, name)
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p.Properties.SourceExists = true
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} else {
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ctx.Rename(name)
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}
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}
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}
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// PrebuiltReplaceMutator replaces dependencies on the source module with dependencies on the prebuilt
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// when both modules exist and the prebuilt should be used.
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func PrebuiltReplaceMutator(ctx BottomUpMutatorContext) {
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if m, ok := ctx.Module().(PrebuiltInterface); ok && m.Prebuilt() != nil {
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p := m.Prebuilt()
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name := m.base().BaseModuleName()
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if p.Properties.SourceExists && p.usePrebuilt(ctx) {
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ctx.ReplaceDependencies(name)
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}
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}
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}
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// PrebuiltDisableMutator disables source modules that have prebuilts that should be used instead.
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func PrebuiltDisableMutator(ctx TopDownMutatorContext) {
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if s, ok := ctx.Module().(PrebuiltSourceInterface); ok {
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ctx.VisitDirectDeps(func(m blueprint.Module) {
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if ctx.OtherModuleDependencyTag(m) == prebuiltDependencyTag {
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p := m.(PrebuiltInterface).Prebuilt()
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if p.usePrebuilt(ctx) {
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s.SkipInstall()
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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 (p *Prebuilt) usePrebuilt(ctx BaseContext) bool {
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// TODO: use p.Properties.Name and ctx.ModuleDir to override prefer
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return p.Properties.Prefer && len(p.Properties.Srcs) > 0
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}
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