Copy documentation from Blueprint interfaces into Soong interfaces
Copy documentation from Blueprint for interface methods that are
wrapped into Soong interfaces.
Test: m checkbuild
Change-Id: Ib58c9201b8e7dfbf900a252e709f0a3cfed73286
diff --git a/android/module.go b/android/module.go
index bfb87fa..1424f76 100644
--- a/android/module.go
+++ b/android/module.go
@@ -61,18 +61,44 @@
// EarlyModuleContext provides methods that can be called early, as soon as the properties have
// been parsed into the module and before any mutators have run.
type EarlyModuleContext interface {
+ // Module returns the current module as a Module. It should rarely be necessary, as the module already has a
+ // reference to itself.
Module() Module
+
+ // ModuleName returns the name of the module. This is generally the value that was returned by Module.Name() when
+ // the module was created, but may have been modified by calls to BaseMutatorContext.Rename.
ModuleName() string
+
+ // ModuleDir returns the path to the directory that contains the definition of the module.
ModuleDir() string
+
+ // ModuleType returns the name of the module type that was used to create the module, as specified in
+ // RegisterModuleType.
ModuleType() string
+
+ // BlueprintFile returns the name of the blueprint file that contains the definition of this
+ // module.
BlueprintsFile() string
+ // ContainsProperty returns true if the specified property name was set in the module definition.
ContainsProperty(name string) bool
+
+ // Errorf reports an error at the specified position of the module definition file.
Errorf(pos scanner.Position, fmt string, args ...interface{})
+
+ // ModuleErrorf reports an error at the line number of the module type in the module definition.
ModuleErrorf(fmt string, args ...interface{})
+
+ // PropertyErrorf reports an error at the line number of a property in the module definition.
PropertyErrorf(property, fmt string, args ...interface{})
+
+ // Failed returns true if any errors have been reported. In most cases the module can continue with generating
+ // build rules after an error, allowing it to report additional errors in a single run, but in cases where the error
+ // has prevented the module from creating necessary data it can return early when Failed returns true.
Failed() bool
+ // AddNinjaFileDeps adds dependencies on the specified files to the rule that creates the ninja manifest. The
+ // primary builder will be rerun whenever the specified files are modified.
AddNinjaFileDeps(deps ...string)
DeviceSpecific() bool
@@ -98,6 +124,8 @@
IsSymlink(path Path) bool
Readlink(path Path) string
+ // Namespace returns the Namespace object provided by the NameInterface set by Context.SetNameInterface, or the
+ // default SimpleNameInterface if Context.SetNameInterface was not called.
Namespace() *Namespace
}
@@ -110,29 +138,109 @@
blueprintBaseModuleContext() blueprint.BaseModuleContext
+ // OtherModuleName returns the name of another Module. See BaseModuleContext.ModuleName for more information.
+ // It is intended for use inside the visit functions of Visit* and WalkDeps.
OtherModuleName(m blueprint.Module) string
+
+ // OtherModuleDir returns the directory of another Module. See BaseModuleContext.ModuleDir for more information.
+ // It is intended for use inside the visit functions of Visit* and WalkDeps.
OtherModuleDir(m blueprint.Module) string
+
+ // OtherModuleErrorf reports an error on another Module. See BaseModuleContext.ModuleErrorf for more information.
+ // It is intended for use inside the visit functions of Visit* and WalkDeps.
OtherModuleErrorf(m blueprint.Module, fmt string, args ...interface{})
+
+ // OtherModuleDependencyTag returns the dependency tag used to depend on a module, or nil if there is no dependency
+ // on the module. When called inside a Visit* method with current module being visited, and there are multiple
+ // dependencies on the module being visited, it returns the dependency tag used for the current dependency.
OtherModuleDependencyTag(m blueprint.Module) blueprint.DependencyTag
+
+ // OtherModuleExists returns true if a module with the specified name exists, as determined by the NameInterface
+ // passed to Context.SetNameInterface, or SimpleNameInterface if it was not called.
OtherModuleExists(name string) bool
+
+ // OtherModuleDependencyVariantExists returns true if a module with the
+ // specified name and variant exists. The variant must match the given
+ // variations. It must also match all the non-local variations of the current
+ // module. In other words, it checks for the module AddVariationDependencies
+ // would add a dependency on with the same arguments.
OtherModuleDependencyVariantExists(variations []blueprint.Variation, name string) bool
+
+ // OtherModuleReverseDependencyVariantExists returns true if a module with the
+ // specified name exists with the same variations as the current module. In
+ // other words, it checks for the module AddReverseDependency would add a
+ // dependency on with the same argument.
OtherModuleReverseDependencyVariantExists(name string) bool
+
+ // OtherModuleType returns the type of another Module. See BaseModuleContext.ModuleType for more information.
+ // It is intended for use inside the visit functions of Visit* and WalkDeps.
OtherModuleType(m blueprint.Module) string
GetDirectDepsWithTag(tag blueprint.DependencyTag) []Module
+
+ // GetDirectDepWithTag returns the Module the direct dependency with the specified name, or nil if
+ // none exists. It panics if the dependency does not have the specified tag. It skips any
+ // dependencies that are not an android.Module.
GetDirectDepWithTag(name string, tag blueprint.DependencyTag) blueprint.Module
+
+ // GetDirectDep returns the Module and DependencyTag for the direct dependency with the specified
+ // name, or nil if none exists. If there are multiple dependencies on the same module it returns
+ // the first DependencyTag. It skips any dependencies that are not an android.Module.
GetDirectDep(name string) (blueprint.Module, blueprint.DependencyTag)
+ // VisitDirectDepsBlueprint calls visit for each direct dependency. If there are multiple
+ // direct dependencies on the same module visit will be called multiple times on that module
+ // and OtherModuleDependencyTag will return a different tag for each.
+ //
+ // The Module passed to the visit function should not be retained outside of the visit
+ // function, it may be invalidated by future mutators.
VisitDirectDepsBlueprint(visit func(blueprint.Module))
+
+ // VisitDirectDeps calls visit for each direct dependency. If there are multiple
+ // direct dependencies on the same module visit will be called multiple times on that module
+ // and OtherModuleDependencyTag will return a different tag for each. It skips any
+ // dependencies that are not an android.Module.
+ //
+ // The Module passed to the visit function should not be retained outside of the visit
+ // function, it may be invalidated by future mutators.
VisitDirectDeps(visit func(Module))
+
VisitDirectDepsWithTag(tag blueprint.DependencyTag, visit func(Module))
+
+ // VisitDirectDepsIf calls pred for each direct dependency, and if pred returns true calls visit. If there are
+ // multiple direct dependencies on the same module pred and visit will be called multiple times on that module and
+ // OtherModuleDependencyTag will return a different tag for each. It skips any
+ // dependencies that are not an android.Module.
+ //
+ // The Module passed to the visit function should not be retained outside of the visit function, it may be
+ // invalidated by future mutators.
VisitDirectDepsIf(pred func(Module) bool, visit func(Module))
// Deprecated: use WalkDeps instead to support multiple dependency tags on the same module
VisitDepsDepthFirst(visit func(Module))
// Deprecated: use WalkDeps instead to support multiple dependency tags on the same module
VisitDepsDepthFirstIf(pred func(Module) bool, visit func(Module))
+
+ // WalkDeps calls visit for each transitive dependency, traversing the dependency tree in top down order. visit may
+ // be called multiple times for the same (child, parent) pair if there are multiple direct dependencies between the
+ // child and parent with different tags. OtherModuleDependencyTag will return the tag for the currently visited
+ // (child, parent) pair. If visit returns false WalkDeps will not continue recursing down to child. It skips
+ // any dependencies that are not an android.Module.
+ //
+ // The Modules passed to the visit function should not be retained outside of the visit function, they may be
+ // invalidated by future mutators.
WalkDeps(visit func(Module, Module) bool)
+
+ // WalkDepsBlueprint calls visit for each transitive dependency, traversing the dependency
+ // tree in top down order. visit may be called multiple times for the same (child, parent)
+ // pair if there are multiple direct dependencies between the child and parent with different
+ // tags. OtherModuleDependencyTag will return the tag for the currently visited
+ // (child, parent) pair. If visit returns false WalkDeps will not continue recursing down
+ // to child.
+ //
+ // The Modules passed to the visit function should not be retained outside of the visit function, they may be
+ // invalidated by future mutators.
WalkDepsBlueprint(visit func(blueprint.Module, blueprint.Module) bool)
+
// GetWalkPath is supposed to be called in visit function passed in WalkDeps()
// and returns a top-down dependency path from a start module to current child module.
GetWalkPath() []Module
@@ -216,10 +324,26 @@
// additional dependencies.
Phony(phony string, deps ...Path)
+ // PrimaryModule returns the first variant of the current module. Variants of a module are always visited in
+ // order by mutators and GenerateBuildActions, so the data created by the current mutator can be read from the
+ // Module returned by PrimaryModule without data races. This can be used to perform singleton actions that are
+ // only done once for all variants of a module.
PrimaryModule() Module
+
+ // FinalModule returns the last variant of the current module. Variants of a module are always visited in
+ // order by mutators and GenerateBuildActions, so the data created by the current mutator can be read from all
+ // variants using VisitAllModuleVariants if the current module == FinalModule(). This can be used to perform
+ // singleton actions that are only done once for all variants of a module.
FinalModule() Module
+
+ // VisitAllModuleVariants calls visit for each variant of the current module. Variants of a module are always
+ // visited in order by mutators and GenerateBuildActions, so the data created by the current mutator can be read
+ // from all variants if the current module == FinalModule(). Otherwise, care must be taken to not access any
+ // data modified by the current mutator.
VisitAllModuleVariants(visit func(Module))
+ // GetMissingDependencies returns the list of dependencies that were passed to AddDependencies or related methods,
+ // but do not exist.
GetMissingDependencies() []string
}
diff --git a/android/mutator.go b/android/mutator.go
index 5212553..738b2ba 100644
--- a/android/mutator.go
+++ b/android/mutator.go
@@ -179,15 +179,24 @@
finalDeps = append(finalDeps, f)
}
+type BaseMutatorContext interface {
+ BaseModuleContext
+
+ // MutatorName returns the name that this mutator was registered with.
+ MutatorName() string
+
+ // Rename all variants of a module. The new name is not visible to calls to ModuleName,
+ // AddDependency or OtherModuleName until after this mutator pass is complete.
+ Rename(name string)
+}
+
type TopDownMutator func(TopDownMutatorContext)
type TopDownMutatorContext interface {
- BaseModuleContext
+ BaseMutatorContext
- MutatorName() string
-
- Rename(name string)
-
+ // CreateModule creates a new module by calling the factory method for the specified moduleType, and applies
+ // the specified property structs to it as if the properties were set in a blueprint file.
CreateModule(ModuleFactory, ...interface{}) Module
}
@@ -199,24 +208,97 @@
type BottomUpMutator func(BottomUpMutatorContext)
type BottomUpMutatorContext interface {
- BaseModuleContext
+ BaseMutatorContext
- MutatorName() string
-
- Rename(name string)
-
+ // AddDependency adds a dependency to the given module.
+ // Does not affect the ordering of the current mutator pass, but will be ordered
+ // correctly for all future mutator passes.
AddDependency(module blueprint.Module, tag blueprint.DependencyTag, name ...string)
+
+ // AddReverseDependency adds a dependency from the destination to the given module.
+ // Does not affect the ordering of the current mutator pass, but will be ordered
+ // correctly for all future mutator passes. All reverse dependencies for a destination module are
+ // collected until the end of the mutator pass, sorted by name, and then appended to the destination
+ // module's dependency list.
AddReverseDependency(module blueprint.Module, tag blueprint.DependencyTag, name string)
+
+ // CreateVariations splits a module into multiple variants, one for each name in the variationNames
+ // parameter. It returns a list of new modules in the same order as the variationNames
+ // list.
+ //
+ // If any of the dependencies of the module being operated on were already split
+ // by calling CreateVariations with the same name, the dependency will automatically
+ // be updated to point the matching variant.
+ //
+ // If a module is split, and then a module depending on the first module is not split
+ // when the Mutator is later called on it, the dependency of the depending module will
+ // automatically be updated to point to the first variant.
CreateVariations(...string) []Module
+
+ // CreateLocationVariations splits a module into multiple variants, one for each name in the variantNames
+ // parameter. It returns a list of new modules in the same order as the variantNames
+ // list.
+ //
+ // Local variations do not affect automatic dependency resolution - dependencies added
+ // to the split module via deps or DynamicDependerModule must exactly match a variant
+ // that contains all the non-local variations.
CreateLocalVariations(...string) []Module
+
+ // SetDependencyVariation sets all dangling dependencies on the current module to point to the variation
+ // with given name. This function ignores the default variation set by SetDefaultDependencyVariation.
SetDependencyVariation(string)
+
+ // SetDefaultDependencyVariation sets the default variation when a dangling reference is detected
+ // during the subsequent calls on Create*Variations* functions. To reset, set it to nil.
SetDefaultDependencyVariation(*string)
+
+ // AddVariationDependencies adds deps as dependencies of the current module, but uses the variations
+ // argument to select which variant of the dependency to use. A variant of the dependency must
+ // exist that matches the all of the non-local variations of the current module, plus the variations
+ // argument.
AddVariationDependencies([]blueprint.Variation, blueprint.DependencyTag, ...string)
+
+ // AddFarVariationDependencies adds deps as dependencies of the current module, but uses the
+ // variations argument to select which variant of the dependency to use. A variant of the
+ // dependency must exist that matches the variations argument, but may also have other variations.
+ // For any unspecified variation the first variant will be used.
+ //
+ // Unlike AddVariationDependencies, the variations of the current module are ignored - the
+ // dependency only needs to match the supplied variations.
AddFarVariationDependencies([]blueprint.Variation, blueprint.DependencyTag, ...string)
+
+ // AddInterVariantDependency adds a dependency between two variants of the same module. Variants are always
+ // ordered in the same orderas they were listed in CreateVariations, and AddInterVariantDependency does not change
+ // that ordering, but it associates a DependencyTag with the dependency and makes it visible to VisitDirectDeps,
+ // WalkDeps, etc.
AddInterVariantDependency(tag blueprint.DependencyTag, from, to blueprint.Module)
+
+ // ReplaceDependencies replaces all dependencies on the identical variant of the module with the
+ // specified name with the current variant of this module. Replacements don't take effect until
+ // after the mutator pass is finished.
ReplaceDependencies(string)
+
+ // ReplaceDependencies replaces all dependencies on the identical variant of the module with the
+ // specified name with the current variant of this module as long as the supplied predicate returns
+ // true.
+ //
+ // Replacements don't take effect until after the mutator pass is finished.
ReplaceDependenciesIf(string, blueprint.ReplaceDependencyPredicate)
+
+ // AliasVariation takes a variationName that was passed to CreateVariations for this module,
+ // and creates an alias from the current variant (before the mutator has run) to the new
+ // variant. The alias will be valid until the next time a mutator calls CreateVariations or
+ // CreateLocalVariations on this module without also calling AliasVariation. The alias can
+ // be used to add dependencies on the newly created variant using the variant map from
+ // before CreateVariations was run.
AliasVariation(variationName string)
+
+ // CreateAliasVariation takes a toVariationName that was passed to CreateVariations for this
+ // module, and creates an alias from a new fromVariationName variant the toVariationName
+ // variant. The alias will be valid until the next time a mutator calls CreateVariations or
+ // CreateLocalVariations on this module without also calling AliasVariation. The alias can
+ // be used to add dependencies on the toVariationName variant using the fromVariationName
+ // variant.
CreateAliasVariation(fromVariationName, toVariationName string)
}
