Fix few issues with filegroups

Bug: http://b/64121881
Bug: http://b/78188880

- Allow filegroup's properties to be extended by a LoadHook
- Support a filegroup (':module') in a prebuilt's 'Srcs' property to
export files from a different path as the prebuilt's sources.

This change also includes a refactoring that moves genrule/filegroup.go
to android/filegroup.go so that FileGroupFactory is visible in
prebuilt_test.go.

Test: Test
https://android-review.googlesource.com/c/platform/development/+/469159
in clang-tools branch on Linux, Darwin.  Test regular build in
aosp/master.

Change-Id: I3ff6215ab2e62955f039fd1086c31f1bd50ebcf6

1 files changed, 0 insertions, 95 deletions

diff --git a/genrule/filegroup.go b/genrule/filegroup.go
deleted file mode 100644
index 2cff5fee..00000000
--- a/genrule/filegroup.go
+++ /dev/null
@@ -1,95 +0,0 @@
-// Copyright 2016 Google Inc. All rights reserved.
-//
-// 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 genrule
-
-import (
-	"android/soong/android"
-	"io"
-	"strings"
-	"text/template"
-)
-
-func init() {
-	android.RegisterModuleType("filegroup", FileGroupFactory)
-}
-
-type fileGroupProperties struct {
-	// srcs lists files that will be included in this filegroup
-	Srcs []string
-
-	Exclude_srcs []string
-
-	// The base path to the files.  May be used by other modules to determine which portion
-	// of the path to use.  For example, when a filegroup is used as data in a cc_test rule,
-	// the base path is stripped off the path and the remaining path is used as the
-	// installation directory.
-	Path *string
-
-	// Create a make variable with the specified name that contains the list of files in the
-	// filegroup, relative to the root of the source tree.
-	Export_to_make_var *string
-}
-
-type fileGroup struct {
-	android.ModuleBase
-	properties fileGroupProperties
-	srcs       android.Paths
-}
-
-var _ android.SourceFileProducer = (*fileGroup)(nil)
-
-// filegroup modules contain a list of files, and can be used to export files across package
-// boundaries.  filegroups (and genrules) can be referenced from srcs properties of other modules
-// using the syntax ":module".
-func FileGroupFactory() android.Module {
-	module := &fileGroup{}
-	module.AddProperties(&module.properties)
-	android.InitAndroidModule(module)
-	return module
-}
-
-func (fg *fileGroup) DepsMutator(ctx android.BottomUpMutatorContext) {
-	android.ExtractSourcesDeps(ctx, fg.properties.Srcs)
-	android.ExtractSourcesDeps(ctx, fg.properties.Exclude_srcs)
-}
-
-func (fg *fileGroup) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	fg.srcs = ctx.ExpandSourcesSubDir(fg.properties.Srcs, fg.properties.Exclude_srcs, String(fg.properties.Path))
-}
-
-func (fg *fileGroup) Srcs() android.Paths {
-	return append(android.Paths{}, fg.srcs...)
-}
-
-var androidMkTemplate = template.Must(template.New("filegroup").Parse(`
-ifdef {{.makeVar}}
-  $(error variable {{.makeVar}} set by soong module is already set in make)
-endif
-{{.makeVar}} := {{.value}}
-.KATI_READONLY := {{.makeVar}}
-`))
-
-func (fg *fileGroup) AndroidMk() android.AndroidMkData {
-	return android.AndroidMkData{
-		Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
-			if makeVar := String(fg.properties.Export_to_make_var); makeVar != "" {
-				androidMkTemplate.Execute(w, map[string]string{
-					"makeVar": makeVar,
-					"value":   strings.Join(fg.srcs.Strings(), " "),
-				})
-			}
-		},
-	}
-}