Generate META/fastboot-info.txt file

Make packaging system generates META/fastboot-info.txt by
1. A checked-in fastboot-info file (TARGET_BOARD_FASTBOOT_INFO_FILE), OR
2. Generating a fastboot-info file from board config vars

This CL implements (1). Cuttlefish uses a checked-in fastboot-info.txt
file.

To implement this, a new property has been added to `android_device`

Test: Built Soong's META/fastboot-info.txt file locally
Bug: 399788523
Change-Id: Iadef020b1144ec72efc3bc3c7020fe63b6c47d4a

3 files changed, 32 insertions, 0 deletions

diff --git a/android/variable.go b/android/variable.go
index 7ac9f08e0..5bc0b297e 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -716,6 +716,8 @@ type PartitionVariables struct {
 	ProductFsCompression string `json:",omitempty"`
 
 	ReleaseToolsExtensionDir string `json:",omitempty"`
+
+	BoardFastbootInfoFile string `json:",omitempty"`
 }
 
 func boolPtr(v bool) *bool {
diff --git a/filesystem/android_device.go b/filesystem/android_device.go
index 6718320e1..c0f0676af 100644
--- a/filesystem/android_device.go
+++ b/filesystem/android_device.go
@@ -87,6 +87,7 @@ type DeviceProperties struct {
 
 	Ramdisk_node_list      *string `android:"path"`
 	Releasetools_extension *string `android:"path"`
+	FastbootInfo           *string `android:"path"`
 }
 
 type androidDevice struct {
@@ -621,6 +622,12 @@ func (a *androidDevice) copyMetadataToTargetZip(ctx android.ModuleContext, build
 	}
 	installedApexKeys = android.SortedUniquePaths(installedApexKeys) // Sort by keypath to match make
 	builder.Command().Text("cat").Inputs(installedApexKeys).Textf(" >> %s/META/apexkeys.txt", targetFilesDir.String())
+	// Copy fastboot-info.txt
+	if fastbootInfo := android.PathForModuleSrc(ctx, proptools.String(a.deviceProps.FastbootInfo)); fastbootInfo != nil {
+		// TODO (b/399788523): Autogenerate fastboot-info.txt if there is no source fastboot-info.txt
+		// https://cs.android.com/android/_/android/platform/build/+/80b9546f8f69e78b8fe1870e0e745d70fc18dfcd:core/Makefile;l=5831-5893;drc=077490384423dff9eac954da5c001c6f0be3fa6e;bpv=0;bpt=0
+		builder.Command().Textf("cp").Input(fastbootInfo).Textf(" %s/META/fastboot-info.txt", targetFilesDir.String())
+	}
 
 	if a.partitionProps.Super_partition_name != nil {
 		superPartition := ctx.GetDirectDepProxyWithTag(*a.partitionProps.Super_partition_name, superPartitionDepTag)
diff --git a/fsgen/filesystem_creator.go b/fsgen/filesystem_creator.go
index 3d83706a3..d286c6641 100644
--- a/fsgen/filesystem_creator.go
+++ b/fsgen/filesystem_creator.go
@@ -340,6 +340,26 @@ func (f *filesystemCreator) createReleaseToolsFilegroup(ctx android.LoadHookCont
 	return releaseToolsFilegroupName, true
 }
 
+func (f *filesystemCreator) createFastbootInfoFilegroup(ctx android.LoadHookContext) (string, bool) {
+	fastbootInfoFile := ctx.Config().ProductVariables().PartitionVarsForSoongMigrationOnlyDoNotUse.BoardFastbootInfoFile
+	if fastbootInfoFile == "" {
+		return "", false
+	}
+
+	fastbootInfoFilegroupName := generatedModuleName(ctx.Config(), "fastboot")
+	filegroupProps := &struct {
+		Name       *string
+		Srcs       []string
+		Visibility []string
+	}{
+		Name:       proptools.StringPtr(fastbootInfoFilegroupName),
+		Srcs:       []string{fastbootInfoFile},
+		Visibility: []string{"//visibility:public"},
+	}
+	ctx.CreateModuleInDirectory(android.FileGroupFactory, ".", filegroupProps)
+	return fastbootInfoFilegroupName, true
+}
+
 func (f *filesystemCreator) createDeviceModule(
 	ctx android.LoadHookContext,
 	partitions allGeneratedPartitionData,
@@ -413,6 +433,9 @@ func (f *filesystemCreator) createDeviceModule(
 	if releaseTools, ok := f.createReleaseToolsFilegroup(ctx); ok {
 		deviceProps.Releasetools_extension = proptools.StringPtr(":" + releaseTools)
 	}
+	if fastbootInfo, ok := f.createFastbootInfoFilegroup(ctx); ok {
+		deviceProps.FastbootInfo = proptools.StringPtr(":" + fastbootInfo)
+	}
 
 	ctx.CreateModule(filesystem.AndroidDeviceFactory, baseProps, partitionProps, deviceProps)
 }