Simplify package by using LoadHook instead of mutators
This was not previously possible due to LoadHooks being run after the module was registered. Bug: 155462403 Test: m nothing Change-Id: Ia8383b9d1272bb12c8a83948753a0e4b0d98a650
This commit is contained in:
Paul Duffin
parent
bd1f870df3
commit
cdfcec98bb
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@ -82,14 +82,6 @@ type RegisterMutatorFunc func(RegisterMutatorsContext)
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var preArch = []RegisterMutatorFunc{
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RegisterNamespaceMutator,
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// Rename package module types.
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//
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// The package module type does not have a name property, instead its name is determined
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// by the location of the containing .bp file relative to the root of the file structure
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// being built by Soong. Unfortunately, due to limitations in LoadHook the module has to
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// be given a synthetic temporary name which is then fixed up by these mutators.
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RegisterPackageRenamer,
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// Create an association between prebuilt modules and their corresponding source
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// modules (if any).
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RegisterPrebuiltsPreArchMutators,
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@ -15,43 +15,20 @@
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package android
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import (
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"fmt"
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"sync/atomic"
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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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func init() {
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RegisterPackageBuildComponents(InitRegistrationContext)
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}
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// Register the package module type and supporting mutators.
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//
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// This must be called in the correct order (relative to other methods that also
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// register mutators) to match the order of mutator registration in mutator.go.
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// Failing to do so will result in an unrealistic test environment.
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// Register the package module type.
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func RegisterPackageBuildComponents(ctx RegistrationContext) {
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ctx.RegisterModuleType("package", PackageFactory)
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// Register mutators that are hard coded in to mutator.go.
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ctx.HardCodedPreArchMutators(RegisterPackageRenamer)
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}
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// The information maintained about each package.
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type packageInfo struct {
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// The module from which this information was populated. If `duplicated` = true then this is the
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// module that has been renamed and must be used to report errors.
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module *packageModule
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// If true this indicates that there are two package statements in the same package which is not
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// allowed and will cause the build to fail. This flag is set by packageRenamer and checked in
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// packageErrorReporter
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duplicated bool
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}
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type packageProperties struct {
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Name string `blueprint:"mutated"`
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// Specifies the default visibility for all modules defined in this package.
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Default_visibility []string
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}
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@ -60,7 +37,6 @@ type packageModule struct {
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ModuleBase
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properties packageProperties
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packageInfo *packageInfo
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}
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func (p *packageModule) GenerateAndroidBuildActions(ModuleContext) {
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@ -76,126 +52,21 @@ func (p *packageModule) qualifiedModuleId(ctx BaseModuleContext) qualifiedModule
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return newPackageId(ctx.ModuleDir())
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}
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func (p *packageModule) Name() string {
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return p.properties.Name
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}
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func (p *packageModule) setName(name string) {
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p.properties.Name = name
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}
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// Counter to ensure package modules are created with a unique name within whatever namespace they
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// belong.
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var packageCount uint32 = 0
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func PackageFactory() Module {
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module := &packageModule{}
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// Get a unique if for the package. Has to be done atomically as the creation of the modules are
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// done in parallel.
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id := atomic.AddUint32(&packageCount, 1)
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name := fmt.Sprintf("soong_package_%d", id)
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module.properties.Name = name
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module.AddProperties(&module.properties)
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// The name is the relative path from build root to the directory containing this
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// module. Set that name at the earliest possible moment that information is available
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// which is in a LoadHook.
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AddLoadHook(module, func(ctx LoadHookContext) {
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module.nameProperties.Name = proptools.StringPtr("//" + ctx.ModuleDir())
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})
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// The default_visibility property needs to be checked and parsed by the visibility module during
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// its checking and parsing phases so make it the primary visibility property.
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setPrimaryVisibilityProperty(module, "default_visibility", &module.properties.Default_visibility)
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return module
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}
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// Registers the function that renames the packages.
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func RegisterPackageRenamer(ctx RegisterMutatorsContext) {
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ctx.BottomUp("packageRenamer", packageRenamer).Parallel()
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ctx.BottomUp("packageErrorReporter", packageErrorReporter).Parallel()
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}
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// Renames the package to match the package directory.
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//
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// This also creates a PackageInfo object for each package and uses that to detect and remember
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// duplicates for later error reporting.
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func packageRenamer(ctx BottomUpMutatorContext) {
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m, ok := ctx.Module().(*packageModule)
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if !ok {
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return
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}
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packageName := "//" + ctx.ModuleDir()
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pi := newPackageInfo(ctx, packageName, m)
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if pi.module != m {
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// Remember that the package was duplicated but do not rename as that will cause an error to
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// be logged with the generated name. Similarly, reporting the error here will use the generated
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// name as renames are only processed after this phase.
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pi.duplicated = true
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} else {
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// This is the first package module in this package so rename it to match the package name.
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m.setName(packageName)
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ctx.Rename(packageName)
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// Store a package info reference in the module.
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m.packageInfo = pi
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}
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}
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// Logs any deferred errors.
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func packageErrorReporter(ctx BottomUpMutatorContext) {
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m, ok := ctx.Module().(*packageModule)
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if !ok {
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return
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}
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packageDir := ctx.ModuleDir()
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packageName := "//" + packageDir
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// Get the PackageInfo for the package. Should have been populated in the packageRenamer phase.
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pi := findPackageInfo(ctx, packageName)
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if pi == nil {
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ctx.ModuleErrorf("internal error, expected package info to be present for package '%s'",
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packageName)
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return
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}
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if pi.module != m {
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// The package module has been duplicated but this is not the module that has been renamed so
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// ignore it. An error will be logged for the renamed module which will ensure that the error
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// message uses the correct name.
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return
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}
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// Check to see whether there are duplicate package modules in the package.
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if pi.duplicated {
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ctx.ModuleErrorf("package {...} specified multiple times")
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return
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}
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}
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type defaultPackageInfoKey string
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func newPackageInfo(
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ctx BaseModuleContext, packageName string, module *packageModule) *packageInfo {
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key := NewCustomOnceKey(defaultPackageInfoKey(packageName))
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return ctx.Config().Once(key, func() interface{} {
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return &packageInfo{module: module}
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}).(*packageInfo)
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}
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// Get the PackageInfo for the package name (starts with //, no trailing /), is nil if no package
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// module type was specified.
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func findPackageInfo(ctx BaseModuleContext, packageName string) *packageInfo {
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key := NewCustomOnceKey(defaultPackageInfoKey(packageName))
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pi := ctx.Config().Once(key, func() interface{} {
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return nil
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})
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if pi == nil {
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return nil
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} else {
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return pi.(*packageInfo)
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}
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}
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@ -20,7 +20,7 @@ var packageTests = []struct {
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}`),
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},
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expectedErrors: []string{
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`top/Blueprints:3:10: mutated field name cannot be set in a Blueprint file`,
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`top/Blueprints:3:10: unrecognized property "name"`,
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`top/Blueprints:4:16: unrecognized property "visibility"`,
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},
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},
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@ -50,7 +50,7 @@ var packageTests = []struct {
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}`),
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},
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expectedErrors: []string{
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`module "//top": package {...} specified multiple times`,
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`module "//top" already defined`,
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},
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},
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}
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