Parse Android boot.img.
The Android boot.img contains kernel, ramdisk and optionally second
stage bootloader. Both kernel and ramdisk could be compressed by gzip.
This patch add a new boot img filesystem to parse boot.img to split
it into |File|s, and find the deflates to utilize puffin, which could
save us several MBs in delta payload size.
As a side effect, generating delta payload for boot partition is much
faster because it is now splitted into smaller files, and we can make
use of multithreading.
Bug: 110494725
Test: generate a delta payload
Change-Id: If41468b37a407fe1b7a70c2b61f632f7df8176d5
diff --git a/update_engine.gyp b/update_engine.gyp
index 7cb2a7d..85632a2 100644
--- a/update_engine.gyp
+++ b/update_engine.gyp
@@ -391,6 +391,7 @@
'payload_generator/annotated_operation.cc',
'payload_generator/blob_file_writer.cc',
'payload_generator/block_mapping.cc',
+ 'payload_generator/boot_img_filesystem.cc',
'payload_generator/bzip.cc',
'payload_generator/cycle_breaker.cc',
'payload_generator/deflate_utils.cc',
@@ -544,6 +545,7 @@
'payload_generator/ab_generator_unittest.cc',
'payload_generator/blob_file_writer_unittest.cc',
'payload_generator/block_mapping_unittest.cc',
+ 'payload_generator/boot_img_filesystem_unittest.cc',
'payload_generator/cycle_breaker_unittest.cc',
'payload_generator/deflate_utils_unittest.cc',
'payload_generator/delta_diff_utils_unittest.cc',