Soong package structure refactoring

Give prebuilt_etc and sh_binary their own packages and split the
gigantic main Android.bp up to small, per-package ones.

Test: m nothing, TreeHugger
Bug: 156980228
Change-Id: I7b00cd344b9f16861f1ff39edf0029f016b853d0
diff --git a/etc/prebuilt_etc.go b/etc/prebuilt_etc.go
new file mode 100644
index 0000000..d6eb008
--- /dev/null
+++ b/etc/prebuilt_etc.go
@@ -0,0 +1,295 @@
+// 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 etc
+
+import (
+	"strconv"
+
+	"github.com/google/blueprint/proptools"
+
+	"android/soong/android"
+)
+
+var pctx = android.NewPackageContext("android/soong/etc")
+
+// TODO(jungw): Now that it handles more than the ones in etc/, consider renaming this file.
+
+func init() {
+	pctx.Import("android/soong/android")
+
+	android.RegisterModuleType("prebuilt_etc", PrebuiltEtcFactory)
+	android.RegisterModuleType("prebuilt_etc_host", PrebuiltEtcHostFactory)
+	android.RegisterModuleType("prebuilt_usr_share", PrebuiltUserShareFactory)
+	android.RegisterModuleType("prebuilt_usr_share_host", PrebuiltUserShareHostFactory)
+	android.RegisterModuleType("prebuilt_font", PrebuiltFontFactory)
+	android.RegisterModuleType("prebuilt_firmware", PrebuiltFirmwareFactory)
+}
+
+type prebuiltEtcProperties struct {
+	// Source file of this prebuilt.
+	Src *string `android:"path,arch_variant"`
+
+	// optional subdirectory under which this file is installed into
+	Sub_dir *string `android:"arch_variant"`
+
+	// optional name for the installed file. If unspecified, name of the module is used as the file name
+	Filename *string `android:"arch_variant"`
+
+	// when set to true, and filename property is not set, the name for the installed file
+	// is the same as the file name of the source file.
+	Filename_from_src *bool `android:"arch_variant"`
+
+	// Make this module available when building for ramdisk.
+	Ramdisk_available *bool
+
+	// Make this module available when building for recovery.
+	Recovery_available *bool
+
+	// Whether this module is directly installable to one of the partitions. Default: true.
+	Installable *bool
+
+	// Install symlinks to the installed file.
+	Symlinks []string `android:"arch_variant"`
+}
+
+type PrebuiltEtcModule interface {
+	android.Module
+	SubDir() string
+	OutputFile() android.OutputPath
+}
+
+type PrebuiltEtc struct {
+	android.ModuleBase
+
+	properties prebuiltEtcProperties
+
+	sourceFilePath android.Path
+	outputFilePath android.OutputPath
+	// The base install location, e.g. "etc" for prebuilt_etc, "usr/share" for prebuilt_usr_share.
+	installDirBase string
+	// The base install location when soc_specific property is set to true, e.g. "firmware" for prebuilt_firmware.
+	socInstallDirBase      string
+	installDirPath         android.InstallPath
+	additionalDependencies *android.Paths
+}
+
+func (p *PrebuiltEtc) inRamdisk() bool {
+	return p.ModuleBase.InRamdisk() || p.ModuleBase.InstallInRamdisk()
+}
+
+func (p *PrebuiltEtc) onlyInRamdisk() bool {
+	return p.ModuleBase.InstallInRamdisk()
+}
+
+func (p *PrebuiltEtc) InstallInRamdisk() bool {
+	return p.inRamdisk()
+}
+
+func (p *PrebuiltEtc) inRecovery() bool {
+	return p.ModuleBase.InRecovery() || p.ModuleBase.InstallInRecovery()
+}
+
+func (p *PrebuiltEtc) onlyInRecovery() bool {
+	return p.ModuleBase.InstallInRecovery()
+}
+
+func (p *PrebuiltEtc) InstallInRecovery() bool {
+	return p.inRecovery()
+}
+
+var _ android.ImageInterface = (*PrebuiltEtc)(nil)
+
+func (p *PrebuiltEtc) ImageMutatorBegin(ctx android.BaseModuleContext) {}
+
+func (p *PrebuiltEtc) CoreVariantNeeded(ctx android.BaseModuleContext) bool {
+	return !p.ModuleBase.InstallInRecovery() && !p.ModuleBase.InstallInRamdisk()
+}
+
+func (p *PrebuiltEtc) RamdiskVariantNeeded(ctx android.BaseModuleContext) bool {
+	return proptools.Bool(p.properties.Ramdisk_available) || p.ModuleBase.InstallInRamdisk()
+}
+
+func (p *PrebuiltEtc) RecoveryVariantNeeded(ctx android.BaseModuleContext) bool {
+	return proptools.Bool(p.properties.Recovery_available) || p.ModuleBase.InstallInRecovery()
+}
+
+func (p *PrebuiltEtc) ExtraImageVariations(ctx android.BaseModuleContext) []string {
+	return nil
+}
+
+func (p *PrebuiltEtc) SetImageVariation(ctx android.BaseModuleContext, variation string, module android.Module) {
+}
+
+func (p *PrebuiltEtc) DepsMutator(ctx android.BottomUpMutatorContext) {
+	if p.properties.Src == nil {
+		ctx.PropertyErrorf("src", "missing prebuilt source file")
+	}
+}
+
+func (p *PrebuiltEtc) SourceFilePath(ctx android.ModuleContext) android.Path {
+	return android.PathForModuleSrc(ctx, android.String(p.properties.Src))
+}
+
+func (p *PrebuiltEtc) InstallDirPath() android.InstallPath {
+	return p.installDirPath
+}
+
+// This allows other derivative modules (e.g. prebuilt_etc_xml) to perform
+// additional steps (like validating the src) before the file is installed.
+func (p *PrebuiltEtc) SetAdditionalDependencies(paths android.Paths) {
+	p.additionalDependencies = &paths
+}
+
+func (p *PrebuiltEtc) OutputFile() android.OutputPath {
+	return p.outputFilePath
+}
+
+func (p *PrebuiltEtc) SubDir() string {
+	return android.String(p.properties.Sub_dir)
+}
+
+func (p *PrebuiltEtc) Installable() bool {
+	return p.properties.Installable == nil || android.Bool(p.properties.Installable)
+}
+
+func (p *PrebuiltEtc) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	p.sourceFilePath = android.PathForModuleSrc(ctx, android.String(p.properties.Src))
+	filename := android.String(p.properties.Filename)
+	filename_from_src := android.Bool(p.properties.Filename_from_src)
+	if filename == "" {
+		if filename_from_src {
+			filename = p.sourceFilePath.Base()
+		} else {
+			filename = ctx.ModuleName()
+		}
+	} else if filename_from_src {
+		ctx.PropertyErrorf("filename_from_src", "filename is set. filename_from_src can't be true")
+		return
+	}
+	p.outputFilePath = android.PathForModuleOut(ctx, filename).OutputPath
+
+	// If soc install dir was specified and SOC specific is set, set the installDirPath to the specified
+	// socInstallDirBase.
+	installBaseDir := p.installDirBase
+	if ctx.SocSpecific() && p.socInstallDirBase != "" {
+		installBaseDir = p.socInstallDirBase
+	}
+	p.installDirPath = android.PathForModuleInstall(ctx, installBaseDir, proptools.String(p.properties.Sub_dir))
+
+	// This ensures that outputFilePath has the correct name for others to
+	// use, as the source file may have a different name.
+	ctx.Build(pctx, android.BuildParams{
+		Rule:   android.Cp,
+		Output: p.outputFilePath,
+		Input:  p.sourceFilePath,
+	})
+}
+
+func (p *PrebuiltEtc) AndroidMkEntries() []android.AndroidMkEntries {
+	nameSuffix := ""
+	if p.inRamdisk() && !p.onlyInRamdisk() {
+		nameSuffix = ".ramdisk"
+	}
+	if p.inRecovery() && !p.onlyInRecovery() {
+		nameSuffix = ".recovery"
+	}
+	return []android.AndroidMkEntries{android.AndroidMkEntries{
+		Class:      "ETC",
+		SubName:    nameSuffix,
+		OutputFile: android.OptionalPathForPath(p.outputFilePath),
+		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
+			func(entries *android.AndroidMkEntries) {
+				entries.SetString("LOCAL_MODULE_TAGS", "optional")
+				entries.SetString("LOCAL_MODULE_PATH", p.installDirPath.ToMakePath().String())
+				entries.SetString("LOCAL_INSTALLED_MODULE_STEM", p.outputFilePath.Base())
+				if len(p.properties.Symlinks) > 0 {
+					entries.AddStrings("LOCAL_MODULE_SYMLINKS", p.properties.Symlinks...)
+				}
+				entries.SetString("LOCAL_UNINSTALLABLE_MODULE", strconv.FormatBool(!p.Installable()))
+				if p.additionalDependencies != nil {
+					for _, path := range *p.additionalDependencies {
+						entries.AddStrings("LOCAL_ADDITIONAL_DEPENDENCIES", path.String())
+					}
+				}
+			},
+		},
+	}}
+}
+
+func InitPrebuiltEtcModule(p *PrebuiltEtc, dirBase string) {
+	p.installDirBase = dirBase
+	p.AddProperties(&p.properties)
+}
+
+// prebuilt_etc is for a prebuilt artifact that is installed in
+// <partition>/etc/<sub_dir> directory.
+func PrebuiltEtcFactory() android.Module {
+	module := &PrebuiltEtc{}
+	InitPrebuiltEtcModule(module, "etc")
+	// This module is device-only
+	android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibFirst)
+	return module
+}
+
+// prebuilt_etc_host is for a host prebuilt artifact that is installed in
+// $(HOST_OUT)/etc/<sub_dir> directory.
+func PrebuiltEtcHostFactory() android.Module {
+	module := &PrebuiltEtc{}
+	InitPrebuiltEtcModule(module, "etc")
+	// This module is host-only
+	android.InitAndroidArchModule(module, android.HostSupported, android.MultilibCommon)
+	return module
+}
+
+// prebuilt_usr_share is for a prebuilt artifact that is installed in
+// <partition>/usr/share/<sub_dir> directory.
+func PrebuiltUserShareFactory() android.Module {
+	module := &PrebuiltEtc{}
+	InitPrebuiltEtcModule(module, "usr/share")
+	// This module is device-only
+	android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibFirst)
+	return module
+}
+
+// prebuild_usr_share_host is for a host prebuilt artifact that is installed in
+// $(HOST_OUT)/usr/share/<sub_dir> directory.
+func PrebuiltUserShareHostFactory() android.Module {
+	module := &PrebuiltEtc{}
+	InitPrebuiltEtcModule(module, "usr/share")
+	// This module is host-only
+	android.InitAndroidArchModule(module, android.HostSupported, android.MultilibCommon)
+	return module
+}
+
+// prebuilt_font installs a font in <partition>/fonts directory.
+func PrebuiltFontFactory() android.Module {
+	module := &PrebuiltEtc{}
+	InitPrebuiltEtcModule(module, "fonts")
+	// This module is device-only
+	android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibFirst)
+	return module
+}
+
+// prebuilt_firmware installs a firmware file to <partition>/etc/firmware directory for system image.
+// If soc_specific property is set to true, the firmware file is installed to the vendor <partition>/firmware
+// directory for vendor image.
+func PrebuiltFirmwareFactory() android.Module {
+	module := &PrebuiltEtc{}
+	module.socInstallDirBase = "firmware"
+	InitPrebuiltEtcModule(module, "etc/firmware")
+	// This module is device-only
+	android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibFirst)
+	return module
+}