tree e1d34566305d4b55fdf8c5226b8b79bbcebcc35e
parent 8dcbcd91c3afea36699a8a80c24f52d6c2ea07bc
author Gilad Arnold <garnold@chromium.org> 1368043973 -0700
committer ChromeBot <chrome-bot@google.com> 1368498671 -0700

paycheck: support for in-place BSDIFF operations

When applying BSDIFF operations in payloads, we used to extract the
block sequences from the old partition and serialize it into a temporary
file, and vice versa for the new partition. This worked but did not
allow us to test bspatch as it is actually being used by the update
engine.

This CLs allows paycheck to invoke bspatch so that it reads/writes block
extents directly from/to the partition file, in the same way it's being
used by the update engine. Since performance is the same, this is the
new default behavior; users can opt for the aforementioned old behavior
using a command-line flag (-x or --extract-bsdiff).

BUG=chromium:229705
TEST=bspatch invoked differently depending on the -x flag
TEST=Passes unit/integration tests

Change-Id: I8821754e1163b357617ece6befa42d1c2e575930
Reviewed-on: https://gerrit.chromium.org/gerrit/50486
Tested-by: Gilad Arnold <garnold@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
Commit-Queue: Gilad Arnold <garnold@chromium.org>