commit 1ac8b59d7896d667c3eb5f7421761ddc87e819ce
author Alex Deymo <deymo@chromium.org> Mon Jan 26 13:22:58 2015 -0800
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> Tue Jan 27 01:59:40 2015 +0000
tree 3d2fb2d94dbb7f0426f5d887091214bb9cf48956
parent f1d582e1a39e170d1a7e20bd21cad25b3f70f96a

update_engine: Extend rollback documentation with powerwash behavior.

The powerwash flag is enabled by default when doing a rollback. This
patch mentions that in the -rollback update_engine_client help.

BUG=None
TEST=update_engine_client --help

Change-Id: Ib9dbd49de02663ecf8c0dd07d635e49fd19644fe
Reviewed-on: https://chromium-review.googlesource.com/243340
Commit-Queue: Alex Deymo <deymo@chromium.org>
Trybot-Ready: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>

update_engine_client.cc

diff --git a/update_engine_client.cc b/update_engine_client.cc
index 5936f47..70bafb4 100644
--- a/update_engine_client.cc
+++ b/update_engine_client.cc
@@ -514,7 +514,9 @@
   DEFINE_bool(block_until_reboot_is_needed, false, "Blocks until reboot is "
               "needed. Returns non-zero exit status if an error occurred.");
   DEFINE_bool(reset_status, false, "Sets the status in update_engine to idle.");
-  DEFINE_bool(rollback, false, "Perform a rollback to the previous partition.");
+  DEFINE_bool(rollback, false,
+              "Perform a rollback to the previous partition. The device will "
+              "be powerwashed unless --nopowerwash is specified.");
   DEFINE_bool(can_rollback, false, "Shows whether rollback partition "
               "is available.");
   DEFINE_bool(show_channel, false, "Show the current and target channels.");