support for ext4/EMMC in target_files and OTA generation

Move the image sizes into a more generic key-value file.  Make them
optional.  Add additional key/value pairs describing what kind of
filesystem the device uses.  Pass new fs-type-related arguments in
edify scripts when mounting and reformatting partitions.

Don't include all the init.*.rc files from the regular system in
recovery -- they aren't needed, and break recovery on some devices.

Change-Id: I40e49e65f0d76f735259e4b4fef882322cd739da
diff --git a/core/Makefile b/core/Makefile
index c8efd86..7a13a43 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -622,6 +622,7 @@
 	mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/tmp
 	echo Copying baseline ramdisk...
 	cp -R $(TARGET_ROOT_OUT) $(TARGET_RECOVERY_OUT)
+	rm $(TARGET_RECOVERY_ROOT_OUT)/init*.rc
 	echo Modifying ramdisk contents...
 	cp -f $(recovery_initrc) $(TARGET_RECOVERY_ROOT_OUT)/
 	cp -f $(recovery_binary) $(TARGET_RECOVERY_ROOT_OUT)/sbin/
@@ -961,11 +962,30 @@
 	$(hide) $(ACP) $(APKCERTS_FILE) $(zip_root)/META/apkcerts.txt
 	$(hide)	echo "$(PRODUCT_OTA_PUBLIC_KEYS)" > $(zip_root)/META/otakeys.txt
 	$(hide) echo "$(PRIVATE_RECOVERY_API_VERSION)" > $(zip_root)/META/recovery-api-version.txt
-	$(hide) echo "blocksize $(BOARD_FLASH_BLOCK_SIZE)" > $(zip_root)/META/imagesizes.txt
-	$(hide) echo "boot $(call image-size-from-data-size,$(BOARD_BOOTIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/imagesizes.txt
-	$(hide) echo "recovery $(call image-size-from-data-size,$(BOARD_RECOVERYIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/imagesizes.txt
-	$(hide) echo "system $(call image-size-from-data-size,$(BOARD_SYSTEMIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/imagesizes.txt
-	$(hide) echo "userdata $(call image-size-from-data-size,$(BOARD_USERDATAIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/imagesizes.txt
+ifdef BOARD_FLASH_BLOCK_SIZE
+	$(hide) echo "blocksize=$(BOARD_FLASH_BLOCK_SIZE)" > $(zip_root)/META/misc_info.txt
+endif
+ifdef BOARD_BOOTIMAGE_PARTITION_SIZE
+	$(hide) echo "boot_size=$(call image-size-from-data-size,$(BOARD_BOOTIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/misc_info.txt
+endif
+ifdef BOARD_RECOVERYIMAGE_PARTITION_SIZE
+	$(hide) echo "recovery_size=$(call image-size-from-data-size,$(BOARD_RECOVERYIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/misc_info.txt
+endif
+ifdef BOARD_SYSTEMIMAGE_PARTITION_SIZE
+	$(hide) echo "system_size=$(call image-size-from-data-size,$(BOARD_SYSTEMIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/misc_info.txt
+endif
+ifdef BOARD_USERDATAIMAGE_PARTITION_SIZE
+	$(hide) echo "userdata_size=$(call image-size-from-data-size,$(BOARD_USERDATAIMAGE_PARTITION_SIZE))" >> $(zip_root)/META/misc_info.txt
+endif
+ifeq ($(TARGET_USERIMAGES_USE_EXT4), true)
+	$(hide) echo "fs_type=ext4" >> $(zip_root)/META/misc_info.txt
+	$(hide) echo "partition_type=EMMC" >> $(zip_root)/META/misc_info.txt
+	@# TODO: where is the right place to get this path from?  BoardConfig.mk?
+	$(hide) echo "partition_path=/dev/block/platform/sdhci-tegra.3/by-name/" >> $(zip_root)/META/misc_info.txt
+else
+	$(hide) echo "fs_type=yaffs2" >> $(zip_root)/META/misc_info.txt
+	$(hide) echo "partition_type=MTD" >> $(zip_root)/META/misc_info.txt
+endif
 	$(hide) echo "$(tool_extensions)" > $(zip_root)/META/tool-extensions.txt
 	@# Zip everything up, preserving symlinks
 	$(hide) (cd $(zip_root) && zip -qry ../$(notdir $@) .)