Revert "Revert "Add prebuilt bootloader var and add bootloader t..."

Revert submission 1411608-revert-1402265-cf-x86-bootloader-XGKLNEQAPF

Reason for revert: Breakage originally caused by change was fixed. Refer to tracking bug for details.
Reverted Changes:
I89e95d4a6:Revert "Add prebuilt bootloader var and add bootlo...
I8fe199351:Revert "Added bootloader binary to cf x86 based ta...

Bug: 166380489
Bug: 164917252
Test: local build and Treehugger build
Change-Id: Ia895aedd77f2ec825aefecaf74c6dfc1ce631c93

core/Makefile

@@ -584,6 +584,10 @@ ALL_DEFAULT_INSTALLED_MODULES += $(event_log_tags_file)
 # #################################################################
 ifneq ($(strip $(TARGET_NO_BOOTLOADER)),true)
   INSTALLED_BOOTLOADER_MODULE := $(PRODUCT_OUT)/bootloader
+  ifdef BOARD_PREBUILT_BOOTLOADER
+    $(eval $(call copy-one-file,$(BOARD_PREBUILT_BOOTLOADER),$(INSTALLED_BOOTLOADER_MODULE)))
+    $(call dist-for-goals,dist_files,$(INSTALLED_BOOTLOADER_MODULE))
+  endif # BOARD_PREBUILT_BOOTLOADER
   ifeq ($(strip $(TARGET_BOOTLOADER_IS_2ND)),true)
     INSTALLED_2NDBOOTLOADER_TARGET := $(PRODUCT_OUT)/2ndbootloader
   else
@@ -4138,6 +4142,9 @@ endif
 ifdef DEVICE_MANIFEST_FILE
 	$(hide) echo "vintf_include_empty_vendor_sku=true" >> $@
 endif
+ifeq ($(BOARD_BOOTLOADER_IN_UPDATE_PACKAGE),true)
+	$(hide) echo "bootloader_in_update_package=true" >> $@
+endif
 
 .PHONY: misc_info
 misc_info: $(INSTALLED_MISC_INFO_TARGET)
@@ -4294,6 +4301,10 @@ MK_VBMETA_BOOT_KERNEL_CMDLINE_SH := device/generic/goldfish/tools/mk_vbmeta_boot
 $(BUILT_TARGET_FILES_PACKAGE): $(MK_VBMETA_BOOT_KERNEL_CMDLINE_SH)
 endif
 
+ifdef BOARD_PREBUILT_BOOTLOADER
+$(BUILT_TARGET_FILES_PACKAGE): $(INSTALLED_BOOTLOADER_MODULE)
+endif
+
 # Depending on the various images guarantees that the underlying
 # directories are up-to-date.
 $(BUILT_TARGET_FILES_PACKAGE): \
@@ -4583,6 +4594,10 @@ ifdef BOARD_PREBUILT_DTBOIMAGE
 	$(hide) mkdir -p $(zip_root)/PREBUILT_IMAGES
 	$(hide) cp $(INSTALLED_DTBOIMAGE_TARGET) $(zip_root)/PREBUILT_IMAGES/
 endif # BOARD_PREBUILT_DTBOIMAGE
+ifdef BOARD_PREBUILT_BOOTLOADER
+	$(hide) mkdir -p $(zip_root)/IMAGES
+	$(hide) cp $(INSTALLED_BOOTLOADER_MODULE) $(zip_root)/IMAGES/
+endif
 ifneq ($(strip $(BOARD_CUSTOMIMAGES_PARTITION_LIST)),)
 	$(hide) mkdir -p $(zip_root)/PREBUILT_IMAGES
 	$(hide) $(foreach partition,$(BOARD_CUSTOMIMAGES_PARTITION_LIST), \

core/board_config.mk

@@ -20,6 +20,7 @@
 # ###############################################################
 
 _board_strip_readonly_list := \
+  BOARD_BOOTLOADER_IN_UPDATE_PACKAGE \
   BOARD_EGL_CFG \
   BOARD_HAVE_BLUETOOTH \
   BOARD_INSTALLER_CMDLINE \

tools/releasetools/img_from_target_files.py

@@ -58,6 +58,7 @@ OPTIONS = common.OPTIONS
 OPTIONS.additional_entries = []
 OPTIONS.bootable_only = False
 OPTIONS.put_super = None
+OPTIONS.put_bootloader = None
 OPTIONS.dynamic_partition_list = None
 OPTIONS.super_device_list = None
 OPTIONS.retrofit_dap = None
@@ -75,6 +76,7 @@ def LoadOptions(input_file):
     info = OPTIONS.info_dict = common.LoadInfoDict(input_zip)
 
   OPTIONS.put_super = info.get('super_image_in_update_package') == 'true'
+  OPTIONS.put_bootloader = info.get('bootloader_in_update_package') == 'true'
   OPTIONS.dynamic_partition_list = info.get('dynamic_partition_list',
                                             '').strip().split()
   OPTIONS.super_device_list = info.get('super_block_devices',
@@ -122,9 +124,11 @@ def EntriesForUserImages(input_file):
 
   for image_path in [name for name in namelist if name.startswith('IMAGES/')]:
     image = os.path.basename(image_path)
-    if OPTIONS.bootable_only and image not in ('boot.img', 'recovery.img'):
+    if OPTIONS.bootable_only and image not in('boot.img', 'recovery.img', 'bootloader'):
       continue
-    if not image.endswith('.img'):
+    if not image.endswith('.img') and image != 'bootloader':
+      continue
+    if image == 'bootloader' and not OPTIONS.put_bootloader:
       continue
     # Filter out super_empty and the images that are already in super partition.
     if OPTIONS.put_super: