// 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 android import ( "sort" "strings" "github.com/google/blueprint" "github.com/google/blueprint/proptools" ) // Extracted from SdkAware to make it easier to define custom subsets of the // SdkAware interface and improve code navigation within the IDE. // // In addition to its use in SdkAware this interface must also be implemented by // APEX to specify the SDKs required by that module and its contents. e.g. APEX // is expected to implement RequiredSdks() by reading its own properties like // `uses_sdks`. type RequiredSdks interface { // The set of SDKs required by an APEX and its contents. RequiredSdks() SdkRefs } // Provided to improve code navigation with the IDE. type sdkAwareWithoutModule interface { RequiredSdks // SdkMemberComponentName will return the name to use for a component of this module based on the // base name of this module. // // The baseName is the name returned by ModuleBase.BaseModuleName(), i.e. the name specified in // the name property in the .bp file so will not include the prebuilt_ prefix. // // The componentNameCreator is a func for creating the name of a component from the base name of // the module, e.g. it could just append ".component" to the name passed in. // // This is intended to be called by prebuilt modules that create component models. It is because // prebuilt module base names come in a variety of different forms: // * unversioned - this is the same as the source module. // * internal to an sdk - this is the unversioned name prefixed by the base name of the sdk // module. // * versioned - this is the same as the internal with the addition of an "@" suffix. // // While this can be called from a source module in that case it will behave the same way as the // unversioned name and return the result of calling the componentNameCreator func on the supplied // base name. // // e.g. Assuming the componentNameCreator func simply appends ".component" to the name passed in // then this will work as follows: // * An unversioned name of "foo" will return "foo.component". // * An internal to the sdk name of "sdk_foo" will return "sdk_foo.component". // * A versioned name of "sdk_foo@current" will return "sdk_foo.component@current". // // Note that in the latter case the ".component" suffix is added before the version. Adding it // after would change the version. SdkMemberComponentName(baseName string, componentNameCreator func(string) string) string sdkBase() *SdkBase MakeMemberOf(sdk SdkRef) IsInAnySdk() bool // IsVersioned determines whether the module is versioned, i.e. has a name of the form // @ IsVersioned() bool ContainingSdk() SdkRef MemberName() string BuildWithSdks(sdks SdkRefs) } // SdkAware is the interface that must be supported by any module to become a member of SDK or to be // built with SDK type SdkAware interface { Module sdkAwareWithoutModule } // SdkRef refers to a version of an SDK type SdkRef struct { Name string Version string } // Unversioned determines if the SdkRef is referencing to the unversioned SDK module func (s SdkRef) Unversioned() bool { return s.Version == "" } // String returns string representation of this SdkRef for debugging purpose func (s SdkRef) String() string { if s.Name == "" { return "(No Sdk)" } if s.Unversioned() { return s.Name } return s.Name + string(SdkVersionSeparator) + s.Version } // SdkVersionSeparator is a character used to separate an sdk name and its version const SdkVersionSeparator = '@' // ParseSdkRef parses a `name@version` style string into a corresponding SdkRef struct func ParseSdkRef(ctx BaseModuleContext, str string, property string) SdkRef { tokens := strings.Split(str, string(SdkVersionSeparator)) if len(tokens) < 1 || len(tokens) > 2 { ctx.PropertyErrorf(property, "%q does not follow name@version syntax", str) return SdkRef{Name: "invalid sdk name", Version: "invalid sdk version"} } name := tokens[0] var version string if len(tokens) == 2 { version = tokens[1] } return SdkRef{Name: name, Version: version} } type SdkRefs []SdkRef // Contains tells if the given SdkRef is in this list of SdkRef's func (refs SdkRefs) Contains(s SdkRef) bool { for _, r := range refs { if r == s { return true } } return false } type sdkProperties struct { // The SDK that this module is a member of. nil if it is not a member of any SDK ContainingSdk *SdkRef `blueprint:"mutated"` // The list of SDK names and versions that are used to build this module RequiredSdks SdkRefs `blueprint:"mutated"` // Name of the module that this sdk member is representing Sdk_member_name *string } // SdkBase is a struct that is expected to be included in module types to implement the SdkAware // interface. InitSdkAwareModule should be called to initialize this struct. type SdkBase struct { properties sdkProperties module SdkAware } func (s *SdkBase) sdkBase() *SdkBase { return s } func (s *SdkBase) SdkMemberComponentName(baseName string, componentNameCreator func(string) string) string { if s.MemberName() == "" { return componentNameCreator(baseName) } else { index := strings.LastIndex(baseName, "@") unversionedName := baseName[:index] unversionedComponentName := componentNameCreator(unversionedName) versionSuffix := baseName[index:] return unversionedComponentName + versionSuffix } } // MakeMemberOf sets this module to be a member of a specific SDK func (s *SdkBase) MakeMemberOf(sdk SdkRef) { s.properties.ContainingSdk = &sdk } // IsInAnySdk returns true if this module is a member of any SDK func (s *SdkBase) IsInAnySdk() bool { return s.properties.ContainingSdk != nil } // IsVersioned returns true if this module is versioned. func (s *SdkBase) IsVersioned() bool { return strings.Contains(s.module.Name(), "@") } // ContainingSdk returns the SDK that this module is a member of func (s *SdkBase) ContainingSdk() SdkRef { if s.properties.ContainingSdk != nil { return *s.properties.ContainingSdk } return SdkRef{Name: "", Version: ""} } // MemberName returns the name of the module that this SDK member is overriding func (s *SdkBase) MemberName() string { return proptools.String(s.properties.Sdk_member_name) } // BuildWithSdks is used to mark that this module has to be built with the given SDK(s). func (s *SdkBase) BuildWithSdks(sdks SdkRefs) { s.properties.RequiredSdks = sdks } // RequiredSdks returns the SDK(s) that this module has to be built with func (s *SdkBase) RequiredSdks() SdkRefs { return s.properties.RequiredSdks } // InitSdkAwareModule initializes the SdkBase struct. This must be called by all modules including // SdkBase. func InitSdkAwareModule(m SdkAware) { base := m.sdkBase() base.module = m m.AddProperties(&base.properties) } // IsModuleInVersionedSdk returns true if the module is an versioned sdk. func IsModuleInVersionedSdk(module Module) bool { if s, ok := module.(SdkAware); ok { if !s.ContainingSdk().Unversioned() { return true } } return false } // Provide support for generating the build rules which will build the snapshot. type SnapshotBuilder interface { // Copy src to the dest (which is a snapshot relative path) and add the dest // to the zip CopyToSnapshot(src Path, dest string) // Unzip the supplied zip into the snapshot relative directory destDir. UnzipToSnapshot(zipPath Path, destDir string) // Add a new prebuilt module to the snapshot. The returned module // must be populated with the module type specific properties. The following // properties will be automatically populated. // // * name // * sdk_member_name // * prefer // // This will result in two Soong modules being generated in the Android. One // that is versioned, coupled to the snapshot version and marked as // prefer=true. And one that is not versioned, not marked as prefer=true and // will only be used if the equivalently named non-prebuilt module is not // present. AddPrebuiltModule(member SdkMember, moduleType string) BpModule // The property tag to use when adding a property to a BpModule that contains // references to other sdk members. Using this will ensure that the reference // is correctly output for both versioned and unversioned prebuilts in the // snapshot. // // "required: true" means that the property must only contain references // to other members of the sdk. Passing a reference to a module that is not a // member of the sdk will result in a build error. // // "required: false" means that the property can contain references to modules // that are either members or not members of the sdk. If a reference is to a // module that is a non member then the reference is left unchanged, i.e. it // is not transformed as references to members are. // // The handling of the member names is dependent on whether it is an internal or // exported member. An exported member is one whose name is specified in one of // the member type specific properties. An internal member is one that is added // due to being a part of an exported (or other internal) member and is not itself // an exported member. // // Member names are handled as follows: // * When creating the unversioned form of the module the name is left unchecked // unless the member is internal in which case it is transformed into an sdk // specific name, i.e. by prefixing with the sdk name. // // * When creating the versioned form of the module the name is transformed into // a versioned sdk specific name, i.e. by prefixing with the sdk name and // suffixing with the version. // // e.g. // bpPropertySet.AddPropertyWithTag("libs", []string{"member1", "member2"}, builder.SdkMemberReferencePropertyTag(true)) SdkMemberReferencePropertyTag(required bool) BpPropertyTag } type BpPropertyTag interface{} // A set of properties for use in a .bp file. type BpPropertySet interface { // Add a property, the value can be one of the following types: // * string // * array of the above // * bool // For these types it is an error if multiple properties with the same name // are added. // // * pointer to a struct // * BpPropertySet // // A pointer to a Blueprint-style property struct is first converted into a // BpPropertySet by traversing the fields and adding their values as // properties in a BpPropertySet. A field with a struct value is itself // converted into a BpPropertySet before adding. // // Adding a BpPropertySet is done as follows: // * If no property with the name exists then the BpPropertySet is added // directly to this property. Care must be taken to ensure that it does not // introduce a cycle. // * If a property exists with the name and the current value is a // BpPropertySet then every property of the new BpPropertySet is added to // the existing BpPropertySet. // * Otherwise, if a property exists with the name then it is an error. AddProperty(name string, value interface{}) // Add a property with an associated tag AddPropertyWithTag(name string, value interface{}, tag BpPropertyTag) // Add a property set with the specified name and return so that additional // properties can be added. AddPropertySet(name string) BpPropertySet // Add comment for property (or property set). AddCommentForProperty(name, text string) } // A .bp module definition. type BpModule interface { BpPropertySet // ModuleType returns the module type of the module ModuleType() string // Name returns the name of the module or "" if no name has been specified. Name() string } // BpPrintable is a marker interface that must be implemented by any struct that is added as a // property value. type BpPrintable interface { bpPrintable() } // BpPrintableBase must be embedded within any struct that is added as a // property value. type BpPrintableBase struct { } func (b BpPrintableBase) bpPrintable() { } var _ BpPrintable = BpPrintableBase{} // An individual member of the SDK, includes all of the variants that the SDK // requires. type SdkMember interface { // The name of the member. Name() string // All the variants required by the SDK. Variants() []SdkAware } // SdkMemberTypeDependencyTag is the interface that a tag must implement in order to allow the // dependent module to be automatically added to the sdk. type SdkMemberTypeDependencyTag interface { blueprint.DependencyTag // SdkMemberType returns the SdkMemberType that will be used to automatically add the child module // to the sdk. // // Returning nil will prevent the module being added to the sdk. SdkMemberType(child Module) SdkMemberType // ExportMember determines whether a module added to the sdk through this tag will be exported // from the sdk or not. // // An exported member is added to the sdk using its own name, e.g. if "foo" was exported from sdk // "bar" then its prebuilt would be simply called "foo". A member can be added to the sdk via // multiple tags and if any of those tags returns true from this method then the membe will be // exported. Every module added directly to the sdk via one of the member type specific // properties, e.g. java_libs, will automatically be exported. // // If a member is not exported then it is treated as an internal implementation detail of the // sdk and so will be added with an sdk specific name. e.g. if "foo" was an internal member of sdk // "bar" then its prebuilt would be called "bar_foo". Additionally its visibility will be set to // "//visibility:private" so it will not be accessible from outside its Android.bp file. ExportMember() bool } var _ SdkMemberTypeDependencyTag = (*sdkMemberDependencyTag)(nil) var _ ReplaceSourceWithPrebuilt = (*sdkMemberDependencyTag)(nil) type sdkMemberDependencyTag struct { blueprint.BaseDependencyTag memberType SdkMemberType export bool } func (t *sdkMemberDependencyTag) SdkMemberType(_ Module) SdkMemberType { return t.memberType } func (t *sdkMemberDependencyTag) ExportMember() bool { return t.export } // Prevent dependencies from the sdk/module_exports onto their members from being // replaced with a preferred prebuilt. func (t *sdkMemberDependencyTag) ReplaceSourceWithPrebuilt() bool { return false } // DependencyTagForSdkMemberType creates an SdkMemberTypeDependencyTag that will cause any // dependencies added by the tag to be added to the sdk as the specified SdkMemberType and exported // (or not) as specified by the export parameter. func DependencyTagForSdkMemberType(memberType SdkMemberType, export bool) SdkMemberTypeDependencyTag { return &sdkMemberDependencyTag{memberType: memberType, export: export} } // Interface that must be implemented for every type that can be a member of an // sdk. // // The basic implementation should look something like this, where ModuleType is // the name of the module type being supported. // // type moduleTypeSdkMemberType struct { // android.SdkMemberTypeBase // } // // func init() { // android.RegisterSdkMemberType(&moduleTypeSdkMemberType{ // SdkMemberTypeBase: android.SdkMemberTypeBase{ // PropertyName: "module_types", // }, // } // } // // ...methods... // type SdkMemberType interface { // The name of the member type property on an sdk module. SdkPropertyName() string // RequiresBpProperty returns true if this member type requires its property to be usable within // an Android.bp file. RequiresBpProperty() bool // True if the member type supports the sdk/sdk_snapshot, false otherwise. UsableWithSdkAndSdkSnapshot() bool // Return true if prebuilt host artifacts may be specific to the host OS. Only // applicable to modules where HostSupported() is true. If this is true, // snapshots will list each host OS variant explicitly and disable all other // host OS'es. IsHostOsDependent() bool // Add dependencies from the SDK module to all the module variants the member // type contributes to the SDK. `names` is the list of module names given in // the member type property (as returned by SdkPropertyName()) in the SDK // module. The exact set of variants required is determined by the SDK and its // properties. The dependencies must be added with the supplied tag. // // The BottomUpMutatorContext provided is for the SDK module. AddDependencies(mctx BottomUpMutatorContext, dependencyTag blueprint.DependencyTag, names []string) // Return true if the supplied module is an instance of this member type. // // This is used to check the type of each variant before added to the // SdkMember. Returning false will cause an error to be logged expaining that // the module is not allowed in whichever sdk property it was added. IsInstance(module Module) bool // UsesSourceModuleTypeInSnapshot returns true when the AddPrebuiltModule() method returns a // source module type. UsesSourceModuleTypeInSnapshot() bool // Add a prebuilt module that the sdk will populate. // // The sdk module code generates the snapshot as follows: // // * A properties struct of type SdkMemberProperties is created for each variant and // populated with information from the variant by calling PopulateFromVariant(SdkAware) // on the struct. // // * An additional properties struct is created into which the common properties will be // added. // // * The variant property structs are analysed to find exported (capitalized) fields which // have common values. Those fields are cleared and the common value added to the common // properties. // // A field annotated with a tag of `sdk:"keep"` will be treated as if it // was not capitalized, i.e. not optimized for common values. // // A field annotated with a tag of `android:"arch_variant"` will be allowed to have // values that differ by arch, fields not tagged as such must have common values across // all variants. // // * Additional field tags can be specified on a field that will ignore certain values // for the purpose of common value optimization. A value that is ignored must have the // default value for the property type. This is to ensure that significant value are not // ignored by accident. The purpose of this is to allow the snapshot generation to reflect // the behavior of the runtime. e.g. if a property is ignored on the host then a property // that is common for android can be treated as if it was common for android and host as // the setting for host is ignored anyway. // * `sdk:"ignored-on-host" - this indicates the property is ignored on the host variant. // // * The sdk module type populates the BpModule structure, creating the arch specific // structure and calls AddToPropertySet(...) on the properties struct to add the member // specific properties in the correct place in the structure. // AddPrebuiltModule(ctx SdkMemberContext, member SdkMember) BpModule // Create a structure into which variant specific properties can be added. CreateVariantPropertiesStruct() SdkMemberProperties } // Base type for SdkMemberType implementations. type SdkMemberTypeBase struct { PropertyName string // When set to true BpPropertyNotRequired indicates that the member type does not require the // property to be specifiable in an Android.bp file. BpPropertyNotRequired bool SupportsSdk bool HostOsDependent bool // When set to true UseSourceModuleTypeInSnapshot indicates that the member type creates a source // module type in its SdkMemberType.AddPrebuiltModule() method. That prevents the sdk snapshot // code from automatically adding a prefer: true flag. UseSourceModuleTypeInSnapshot bool } func (b *SdkMemberTypeBase) SdkPropertyName() string { return b.PropertyName } func (b *SdkMemberTypeBase) RequiresBpProperty() bool { return !b.BpPropertyNotRequired } func (b *SdkMemberTypeBase) UsableWithSdkAndSdkSnapshot() bool { return b.SupportsSdk } func (b *SdkMemberTypeBase) IsHostOsDependent() bool { return b.HostOsDependent } func (b *SdkMemberTypeBase) UsesSourceModuleTypeInSnapshot() bool { return b.UseSourceModuleTypeInSnapshot } // Encapsulates the information about registered SdkMemberTypes. type SdkMemberTypesRegistry struct { // The list of types sorted by property name. list []SdkMemberType // The key that uniquely identifies this registry instance. key OnceKey } func (r *SdkMemberTypesRegistry) copyAndAppend(memberType SdkMemberType) *SdkMemberTypesRegistry { oldList := r.list // Copy the slice just in case this is being read while being modified, e.g. when testing. list := make([]SdkMemberType, 0, len(oldList)+1) list = append(list, oldList...) list = append(list, memberType) // Sort the member types by their property name to ensure that registry order has no effect // on behavior. sort.Slice(list, func(i1, i2 int) bool { t1 := list[i1] t2 := list[i2] return t1.SdkPropertyName() < t2.SdkPropertyName() }) // Generate a key that identifies the slice of SdkMemberTypes by joining the property names // from all the SdkMemberType . var properties []string for _, t := range list { properties = append(properties, t.SdkPropertyName()) } key := NewOnceKey(strings.Join(properties, "|")) // Create a new registry so the pointer uniquely identifies the set of registered types. return &SdkMemberTypesRegistry{ list: list, key: key, } } func (r *SdkMemberTypesRegistry) RegisteredTypes() []SdkMemberType { return r.list } func (r *SdkMemberTypesRegistry) UniqueOnceKey() OnceKey { // Use the pointer to the registry as the unique key. return NewCustomOnceKey(r) } // The set of registered SdkMemberTypes, one for sdk module and one for module_exports. var ModuleExportsMemberTypes = &SdkMemberTypesRegistry{} var SdkMemberTypes = &SdkMemberTypesRegistry{} // Register an SdkMemberType object to allow them to be used in the sdk and sdk_snapshot module // types. func RegisterSdkMemberType(memberType SdkMemberType) { // All member types are usable with module_exports. ModuleExportsMemberTypes = ModuleExportsMemberTypes.copyAndAppend(memberType) // Only those that explicitly indicate it are usable with sdk. if memberType.UsableWithSdkAndSdkSnapshot() { SdkMemberTypes = SdkMemberTypes.copyAndAppend(memberType) } } // Base structure for all implementations of SdkMemberProperties. // // Contains common properties that apply across many different member types. type SdkMemberPropertiesBase struct { // The number of unique os types supported by the member variants. // // If a member has a variant with more than one os type then it will need to differentiate // the locations of any of their prebuilt files in the snapshot by os type to prevent them // from colliding. See OsPrefix(). // // This property is the same for all variants of a member and so would be optimized away // if it was not explicitly kept. Os_count int `sdk:"keep"` // The os type for which these properties refer. // // Provided to allow a member to differentiate between os types in the locations of their // prebuilt files when it supports more than one os type. // // This property is the same for all os type specific variants of a member and so would be // optimized away if it was not explicitly kept. Os OsType `sdk:"keep"` // The setting to use for the compile_multilib property. Compile_multilib string `android:"arch_variant"` } // The os prefix to use for any file paths in the sdk. // // Is an empty string if the member only provides variants for a single os type, otherwise // is the OsType.Name. func (b *SdkMemberPropertiesBase) OsPrefix() string { if b.Os_count == 1 { return "" } else { return b.Os.Name } } func (b *SdkMemberPropertiesBase) Base() *SdkMemberPropertiesBase { return b } // Interface to be implemented on top of a structure that contains variant specific // information. // // Struct fields that are capitalized are examined for common values to extract. Fields // that are not capitalized are assumed to be arch specific. type SdkMemberProperties interface { // Access the base structure. Base() *SdkMemberPropertiesBase // Populate this structure with information from the variant. PopulateFromVariant(ctx SdkMemberContext, variant Module) // Add the information from this structure to the property set. AddToPropertySet(ctx SdkMemberContext, propertySet BpPropertySet) } // Provides access to information common to a specific member. type SdkMemberContext interface { // The module context of the sdk common os variant which is creating the snapshot. SdkModuleContext() ModuleContext // The builder of the snapshot. SnapshotBuilder() SnapshotBuilder // The type of the member. MemberType() SdkMemberType // The name of the member. // // Provided for use by sdk members to create a member specific location within the snapshot // into which to copy the prebuilt files. Name() string } // ExportedComponentsInfo contains information about the components that this module exports to an // sdk snapshot. // // A component of a module is a child module that the module creates and which forms an integral // part of the functionality that the creating module provides. A component module is essentially // owned by its creator and is tightly coupled to the creator and other components. // // e.g. the child modules created by prebuilt_apis are not components because they are not tightly // coupled to the prebuilt_apis module. Once they are created the prebuilt_apis ignores them. The // child impl and stub library created by java_sdk_library (and corresponding import) are components // because the creating module depends upon them in order to provide some of its own functionality. // // A component is exported if it is part of an sdk snapshot. e.g. The xml and impl child modules are // components but they are not exported as they are not part of an sdk snapshot. // // This information is used by the sdk snapshot generation code to ensure that it does not create // an sdk snapshot that contains a declaration of the component module and the module that creates // it as that would result in duplicate modules when attempting to use the snapshot. e.g. a snapshot // that included the java_sdk_library_import "foo" and also a java_import "foo.stubs" would fail // as there would be two modules called "foo.stubs". type ExportedComponentsInfo struct { // The names of the exported components. Components []string } var ExportedComponentsInfoProvider = blueprint.NewProvider(ExportedComponentsInfo{})