Remove versioned_ndk_headers module type.

No longer used.

Bug: None
Test: treehugger
Change-Id: I74e89ff2e7ffb7d81a0b123507df5a973f9400d4
diff --git a/cc/library.go b/cc/library.go
index 65a923a..03f7174 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -1264,14 +1264,6 @@
 func (library *libraryDecorator) llndkIncludeDirsForAbiCheck(ctx ModuleContext, deps PathDeps) []string {
 	var includeDirs, systemIncludeDirs []string
 
-	// The ABI checker does not need the preprocess which adds macro guards to function declarations.
-	preprocessedDirs := android.PathsForModuleSrc(ctx, library.Properties.Llndk.Export_preprocessed_headers).Strings()
-	if Bool(library.Properties.Llndk.Export_headers_as_system) {
-		systemIncludeDirs = append(systemIncludeDirs, preprocessedDirs...)
-	} else {
-		includeDirs = append(includeDirs, preprocessedDirs...)
-	}
-
 	if library.Properties.Llndk.Override_export_include_dirs != nil {
 		includeDirs = append(includeDirs, android.PathsForModuleSrc(
 			ctx, library.Properties.Llndk.Override_export_include_dirs).Strings()...)
@@ -1579,25 +1571,6 @@
 	}
 }
 
-func processLLNDKHeaders(ctx ModuleContext, srcHeaderDir string, outDir android.ModuleGenPath) (timestamp android.Path, installPaths android.WritablePaths) {
-	srcDir := android.PathForModuleSrc(ctx, srcHeaderDir)
-	srcFiles := ctx.GlobFiles(filepath.Join(srcDir.String(), "**/*.h"), nil)
-
-	for _, header := range srcFiles {
-		headerDir := filepath.Dir(header.String())
-		relHeaderDir, err := filepath.Rel(srcDir.String(), headerDir)
-		if err != nil {
-			ctx.ModuleErrorf("filepath.Rel(%q, %q) failed: %s",
-				srcDir.String(), headerDir, err)
-			continue
-		}
-
-		installPaths = append(installPaths, outDir.Join(ctx, relHeaderDir, header.Base()))
-	}
-
-	return processHeadersWithVersioner(ctx, srcDir, outDir, srcFiles, installPaths), installPaths
-}
-
 // link registers actions to link this library, and sets various fields
 // on this library to reflect information that should be exported up the build
 // tree (for example, exported flags and include paths).
@@ -1605,26 +1578,6 @@
 	flags Flags, deps PathDeps, objs Objects) android.Path {
 
 	if ctx.IsLlndk() {
-		if len(library.Properties.Llndk.Export_preprocessed_headers) > 0 {
-			// This is the vendor variant of an LLNDK library with preprocessed headers.
-			genHeaderOutDir := android.PathForModuleGen(ctx, "include")
-
-			var timestampFiles android.Paths
-			for _, dir := range library.Properties.Llndk.Export_preprocessed_headers {
-				timestampFile, installPaths := processLLNDKHeaders(ctx, dir, genHeaderOutDir)
-				timestampFiles = append(timestampFiles, timestampFile)
-				library.addExportedGeneratedHeaders(installPaths.Paths()...)
-			}
-
-			if Bool(library.Properties.Llndk.Export_headers_as_system) {
-				library.reexportSystemDirs(genHeaderOutDir)
-			} else {
-				library.reexportDirs(genHeaderOutDir)
-			}
-
-			library.reexportDeps(timestampFiles...)
-		}
-
 		// override the module's export_include_dirs with llndk.override_export_include_dirs
 		// if it is set.
 		if override := library.Properties.Llndk.Override_export_include_dirs; override != nil {
diff --git a/cc/llndk_library.go b/cc/llndk_library.go
index 5ece78a..c7950f9 100644
--- a/cc/llndk_library.go
+++ b/cc/llndk_library.go
@@ -36,10 +36,6 @@
 	// bionic/libc.
 	Export_headers_as_system *bool
 
-	// Which headers to process with versioner. This really only handles
-	// bionic/libc/include right now.
-	Export_preprocessed_headers []string
-
 	// Whether the system library uses symbol versions.
 	Unversioned *bool
 
diff --git a/cc/ndk_headers.go b/cc/ndk_headers.go
index e002931..7481954 100644
--- a/cc/ndk_headers.go
+++ b/cc/ndk_headers.go
@@ -23,15 +23,6 @@
 )
 
 var (
-	versionBionicHeaders = pctx.AndroidStaticRule("versionBionicHeaders",
-		blueprint.RuleParams{
-			// The `&& touch $out` isn't really necessary, but Blueprint won't
-			// let us have only implicit outputs.
-			Command:     "$versionerCmd -o $outDir $srcDir $depsPath && touch $out",
-			CommandDeps: []string{"$versionerCmd"},
-		},
-		"depsPath", "srcDir", "outDir")
-
 	preprocessNdkHeader = pctx.AndroidStaticRule("preprocessNdkHeader",
 		blueprint.RuleParams{
 			Command:     "$preprocessor -o $out $in",
@@ -40,10 +31,6 @@
 		"preprocessor")
 )
 
-func init() {
-	pctx.SourcePathVariable("versionerCmd", "prebuilts/clang-tools/${config.HostPrebuiltTag}/bin/versioner")
-}
-
 // Returns the NDK base include path for use with sdk_version current. Usable with -I.
 func getCurrentIncludePath(ctx android.PathContext) android.OutputPath {
 	return getNdkSysrootBase(ctx).Join(ctx, "usr/include")
@@ -167,126 +154,6 @@
 	return module
 }
 
-type versionedHeaderProperties struct {
-	// Base directory of the headers being installed. As an example:
-	//
-	// versioned_ndk_headers {
-	//     name: "foo",
-	//     from: "include",
-	//     to: "",
-	// }
-	//
-	// Will install $SYSROOT/usr/include/foo/bar/baz.h. If `from` were instead
-	// "include/foo", it would have installed $SYSROOT/usr/include/bar/baz.h.
-	From *string
-
-	// Install path within the sysroot. This is relative to usr/include.
-	To *string
-
-	// Path to the NOTICE file associated with the headers.
-	License *string
-}
-
-// Like ndk_headers, but preprocesses the headers with the bionic versioner:
-// https://android.googlesource.com/platform/bionic/+/main/tools/versioner/README.md.
-//
-// Unlike ndk_headers, we don't operate on a list of sources but rather a whole directory, the
-// module does not have the srcs property, and operates on a full directory (the `from` property).
-//
-// Note that this is really only built to handle bionic/libc/include.
-type versionedHeaderModule struct {
-	android.ModuleBase
-
-	properties versionedHeaderProperties
-
-	srcPaths     android.Paths
-	installPaths android.Paths
-	licensePath  android.Path
-}
-
-// Return the glob pattern to find all .h files beneath `dir`
-func headerGlobPattern(dir string) string {
-	return filepath.Join(dir, "**", "*.h")
-}
-
-func (m *versionedHeaderModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	if String(m.properties.License) == "" {
-		ctx.PropertyErrorf("license", "field is required")
-	}
-
-	m.licensePath = android.PathForModuleSrc(ctx, String(m.properties.License))
-
-	fromSrcPath := android.PathForModuleSrc(ctx, String(m.properties.From))
-	toOutputPath := getCurrentIncludePath(ctx).Join(ctx, String(m.properties.To))
-	m.srcPaths = ctx.GlobFiles(headerGlobPattern(fromSrcPath.String()), nil)
-	var installPaths []android.WritablePath
-	for _, header := range m.srcPaths {
-		installDir := getHeaderInstallDir(ctx, header, String(m.properties.From), String(m.properties.To))
-		installPath := installDir.Join(ctx, header.Base())
-		installPaths = append(installPaths, installPath)
-		m.installPaths = append(m.installPaths, installPath)
-	}
-
-	if len(m.installPaths) == 0 {
-		ctx.ModuleErrorf("glob %q matched zero files", String(m.properties.From))
-	}
-
-	processHeadersWithVersioner(ctx, fromSrcPath, toOutputPath, m.srcPaths, installPaths)
-}
-
-func processHeadersWithVersioner(ctx android.ModuleContext, srcDir, outDir android.Path,
-	srcPaths android.Paths, installPaths []android.WritablePath) android.Path {
-	// The versioner depends on a dependencies directory to simplify determining include paths
-	// when parsing headers. This directory contains architecture specific directories as well
-	// as a common directory, each of which contains symlinks to the actually directories to
-	// be included.
-	//
-	// ctx.Glob doesn't follow symlinks, so we need to do this ourselves so we correctly
-	// depend on these headers.
-	// TODO(http://b/35673191): Update the versioner to use a --sysroot.
-	depsPath := android.PathForSource(ctx, "bionic/libc/versioner-dependencies")
-	depsGlob := ctx.Glob(filepath.Join(depsPath.String(), "**/*"), nil)
-	for i, path := range depsGlob {
-		if ctx.IsSymlink(path) {
-			dest := ctx.Readlink(path)
-			// Additional .. to account for the symlink itself.
-			depsGlob[i] = android.PathForSource(
-				ctx, filepath.Clean(filepath.Join(path.String(), "..", dest)))
-		}
-	}
-
-	timestampFile := android.PathForModuleOut(ctx, "versioner.timestamp")
-	ctx.Build(pctx, android.BuildParams{
-		Rule:            versionBionicHeaders,
-		Description:     "versioner preprocess " + srcDir.Rel(),
-		Output:          timestampFile,
-		Implicits:       append(srcPaths, depsGlob...),
-		ImplicitOutputs: installPaths,
-		Args: map[string]string{
-			"depsPath": depsPath.String(),
-			"srcDir":   srcDir.String(),
-			"outDir":   outDir.String(),
-		},
-	})
-
-	return timestampFile
-}
-
-// versioned_ndk_headers preprocesses the headers with the bionic versioner:
-// https://android.googlesource.com/platform/bionic/+/main/tools/versioner/README.md.
-// Unlike the ndk_headers soong module, versioned_ndk_headers operates on a
-// directory level specified in `from` property. This is only used to process
-// the bionic/libc/include directory.
-func VersionedNdkHeadersFactory() android.Module {
-	module := &versionedHeaderModule{}
-
-	module.AddProperties(&module.properties)
-
-	android.InitAndroidModule(module)
-
-	return module
-}
-
 // preprocessed_ndk_header {
 //
 //	name: "foo",
diff --git a/cc/ndk_sysroot.go b/cc/ndk_sysroot.go
index f571523..92da172 100644
--- a/cc/ndk_sysroot.go
+++ b/cc/ndk_sysroot.go
@@ -79,7 +79,6 @@
 func RegisterNdkModuleTypes(ctx android.RegistrationContext) {
 	ctx.RegisterModuleType("ndk_headers", NdkHeadersFactory)
 	ctx.RegisterModuleType("ndk_library", NdkLibraryFactory)
-	ctx.RegisterModuleType("versioned_ndk_headers", VersionedNdkHeadersFactory)
 	ctx.RegisterModuleType("preprocessed_ndk_headers", preprocessedNdkHeadersFactory)
 	ctx.RegisterParallelSingletonType("ndk", NdkSingleton)
 }
@@ -230,17 +229,6 @@
 			licensePaths = append(licensePaths, m.licensePath)
 		}
 
-		if m, ok := module.(*versionedHeaderModule); ok {
-			headerSrcPaths = append(headerSrcPaths, m.srcPaths...)
-			headerInstallPaths = append(headerInstallPaths, m.installPaths...)
-			// Verification intentionally not done for headers that go through
-			// versioner. It'd be nice to have, but the only user is bionic, and
-			// that one module would also need to use skip_verification, so it
-			// wouldn't help at all.
-			installPaths = append(installPaths, m.installPaths...)
-			licensePaths = append(licensePaths, m.licensePath)
-		}
-
 		if m, ok := module.(*preprocessedHeadersModule); ok {
 			headerSrcPaths = append(headerSrcPaths, m.srcPaths...)
 			headerInstallPaths = append(headerInstallPaths, m.installPaths...)