Merge "Handle simple prebuilt static libraries from bazel" am: 76579e0e9a am: 70a88424ba am: 8d77e0b2fd

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1664542

Change-Id: Ib330bfb45d699a0541c12362939ad780f4057a01

android/bazel_handler.go

@@ -69,6 +69,10 @@ type BazelContext interface {
 	// Returns the results of GetOutputFiles and GetCcObjectFiles in a single query (in that order).
 	GetOutputFilesAndCcObjectFiles(label string, archType ArchType) ([]string, []string, bool)
 
+	// GetPrebuiltCcStaticLibraryFiles returns paths to prebuilt cc static libraries, and whether the
+	// results were available
+	GetPrebuiltCcStaticLibraryFiles(label string, archType ArchType) ([]string, bool)
+
 	// ** End cquery methods
 
 	// Issues commands to Bazel to receive results for all cquery requests
@@ -126,6 +130,11 @@ func (m MockBazelContext) GetOutputFilesAndCcObjectFiles(label string, archType
 	return result, result, ok
 }
 
+func (m MockBazelContext) GetPrebuiltCcStaticLibraryFiles(label string, archType ArchType) ([]string, bool) {
+	result, ok := m.AllFiles[label]
+	return result, ok
+}
+
 func (m MockBazelContext) InvokeBazel() error {
 	panic("unimplemented")
 }
@@ -169,6 +178,19 @@ func (bazelCtx *bazelContext) GetOutputFilesAndCcObjectFiles(label string, archT
 	return outputFiles, ccObjects, ok
 }
 
+// GetPrebuiltCcStaticLibraryFiles returns a slice of prebuilt static libraries for the given
+// label/archType if there are query results; otherwise, it enqueues the query and returns false.
+func (bazelCtx *bazelContext) GetPrebuiltCcStaticLibraryFiles(label string, archType ArchType) ([]string, bool) {
+	result, ok := bazelCtx.cquery(label, cquery.GetPrebuiltCcStaticLibraryFiles, archType)
+	if !ok {
+		return nil, false
+	}
+
+	bazelOutput := strings.TrimSpace(result)
+	ret := cquery.GetPrebuiltCcStaticLibraryFiles.ParseResult(bazelOutput)
+	return ret, ok
+}
+
 func (n noopBazelContext) GetOutputFiles(label string, archType ArchType) ([]string, bool) {
 	panic("unimplemented")
 }
@@ -177,6 +199,10 @@ func (n noopBazelContext) GetOutputFilesAndCcObjectFiles(label string, archType
 	panic("unimplemented")
 }
 
+func (n noopBazelContext) GetPrebuiltCcStaticLibraryFiles(label string, archType ArchType) ([]string, bool) {
+	panic("unimplemented")
+}
+
 func (n noopBazelContext) InvokeBazel() error {
 	panic("unimplemented")
 }

bazel/cquery/request_type.go

@@ -7,6 +7,7 @@ import (
 var (
 	GetOutputFiles                  = &getOutputFilesRequestType{}
 	GetOutputFilesAndCcObjectFiles  = &getOutputFilesAndCcObjectFilesType{}
+	GetPrebuiltCcStaticLibraryFiles = &getPrebuiltCcStaticLibraryFiles{}
 )
 
 type GetOutputFilesAndCcObjectFiles_Result struct {
@@ -86,6 +87,34 @@ func (g getOutputFilesAndCcObjectFilesType) ParseResult(rawString string) GetOut
 	return GetOutputFilesAndCcObjectFiles_Result{outputFiles, ccObjects}
 }
 
+type getPrebuiltCcStaticLibraryFiles struct{}
+
+// Name returns the name of the starlark function to get prebuilt cc static library files
+func (g getPrebuiltCcStaticLibraryFiles) Name() string {
+	return "getPrebuiltCcStaticLibraryFiles"
+}
+
+// StarlarkFunctionBody returns the unindented body of a starlark function for extracting the static
+// library paths from a cc_import module.
+func (g getPrebuiltCcStaticLibraryFiles) StarlarkFunctionBody() string {
+	return `
+linker_inputs = providers(target)["CcInfo"].linking_context.linker_inputs.to_list()
+
+static_libraries = []
+for linker_input in linker_inputs:
+  for library in linker_input.libraries:
+    static_libraries.append(library.static_library.path)
+
+return ', '.join(static_libraries)`
+}
+
+// ParseResult returns a slice of bazel output paths to static libraries if any exist for the given
+// rawString corresponding to the string output which was created by evaluating the
+// StarlarkFunctionBody.
+func (g getPrebuiltCcStaticLibraryFiles) ParseResult(rawString string) []string {
+	return strings.Split(rawString, ", ")
+}
+
 // splitOrEmpty is a modification of strings.Split() that returns an empty list
 // if the given string is empty.
 func splitOrEmpty(s string, sep string) []string {

cc/prebuilt.go

@@ -305,6 +305,7 @@ func PrebuiltStaticLibraryFactory() android.Module {
 func NewPrebuiltStaticLibrary(hod android.HostOrDeviceSupported) (*Module, *libraryDecorator) {
 	module, library := NewPrebuiltLibrary(hod)
 	library.BuildOnlyStatic()
+	module.bazelHandler = &prebuiltStaticLibraryBazelHandler{module: module, library: library}
 	return module, library
 }
 
@@ -319,6 +320,52 @@ type prebuiltObjectLinker struct {
 	properties prebuiltObjectProperties
 }
 
+type prebuiltStaticLibraryBazelHandler struct {
+	bazelHandler
+
+	module  *Module
+	library *libraryDecorator
+}
+
+func (h *prebuiltStaticLibraryBazelHandler) generateBazelBuildActions(ctx android.ModuleContext, label string) bool {
+	bazelCtx := ctx.Config().BazelContext
+	staticLibs, ok := bazelCtx.GetPrebuiltCcStaticLibraryFiles(label, ctx.Arch().ArchType)
+	if !ok {
+		return false
+	}
+	if len(staticLibs) > 1 {
+		ctx.ModuleErrorf("expected 1 static library from bazel target %q, got %s", label, staticLibs)
+		return false
+	}
+
+	// TODO(b/184543518): cc_prebuilt_library_static may have properties for re-exporting flags
+
+	// TODO(eakammer):Add stub-related flags if this library is a stub library.
+	// h.library.exportVersioningMacroIfNeeded(ctx)
+
+	// Dependencies on this library will expect collectedSnapshotHeaders to be set, otherwise
+	// validation will fail. For now, set this to an empty list.
+	// TODO(cparsons): More closely mirror the collectHeadersForSnapshot implementation.
+	h.library.collectedSnapshotHeaders = android.Paths{}
+
+	if len(staticLibs) == 0 {
+		h.module.outputFile = android.OptionalPath{}
+		return true
+	}
+
+	out := android.PathForBazelOut(ctx, staticLibs[0])
+	h.module.outputFile = android.OptionalPathForPath(out)
+
+	depSet := android.NewDepSetBuilder(android.TOPOLOGICAL).Direct(out).Build()
+	ctx.SetProvider(StaticLibraryInfoProvider, StaticLibraryInfo{
+		StaticLibrary: out,
+
+		TransitiveStaticLibrariesForOrdering: depSet,
+	})
+
+	return true
+}
+
 func (p *prebuiltObjectLinker) prebuilt() *android.Prebuilt {
 	return &p.Prebuilt
 }