update_engine: Adds BROTLI_BSDIFF operation
Brotli compression creates on average 10%-20% smaller output than bzip2
in addition to having faster decompressor. With recent changes in bsdiff
to compress the its patch with brotli, we can use it in the
update_engine as a new operation BROTLI_BSDIFF. This operation will be
turned on in minor version 4. However, this CL only adds support for it
in the client. It will not generate BROTLI_BSDIFF operations yet.
BUG=chromium:783437
TEST=unittests pass for both update_engine and update_payload;
'brillo_update_payload {generate|verify}' passes;
'scripts/paycheck.py payload.delta' passes;
Change-Id: Ie791ba5431561c95de6fbc031a8196dbfd912288
Reviewed-on: https://chromium-review.googlesource.com/764791
Commit-Ready: Amin Hassani <[email protected]>
Tested-by: Amin Hassani <[email protected]>
Reviewed-by: Ben Chan <[email protected]>
diff --git a/scripts/update_payload/common.py b/scripts/update_payload/common.py
index bab8a4f..eaf0611 100644
--- a/scripts/update_payload/common.py
+++ b/scripts/update_payload/common.py
@@ -46,8 +46,9 @@
DISCARD = _CLASS.DISCARD
REPLACE_XZ = _CLASS.REPLACE_XZ
PUFFDIFF = _CLASS.PUFFDIFF
+ BROTLI_BSDIFF = _CLASS.BROTLI_BSDIFF
ALL = (REPLACE, REPLACE_BZ, MOVE, BSDIFF, SOURCE_COPY, SOURCE_BSDIFF, ZERO,
- DISCARD, REPLACE_XZ, PUFFDIFF)
+ DISCARD, REPLACE_XZ, PUFFDIFF, BROTLI_BSDIFF)
NAMES = {
REPLACE: 'REPLACE',
REPLACE_BZ: 'REPLACE_BZ',
@@ -59,6 +60,7 @@
DISCARD: 'DISCARD',
REPLACE_XZ: 'REPLACE_XZ',
PUFFDIFF: 'PUFFDIFF',
+ BROTLI_BSDIFF: 'BROTLI_BSDIFF',
}
def __init__(self):
