tree 2a82ad1fd081ed48bcdabedb32475da9e97e67db
parent b38e3a63a8b1d42fd707e4c23e71c3f3ed84e6ad
author Mike Frysinger <vapier@chromium.org> 1622187943 -0400
committer Commit Bot <commit-bot@chromium.org> 1622817370 +0000

image_signing: simplify & fix mount cleanups

We don't need all this infrastructure for arbitrary cleanups when we
only ever run 2 clean up steps.  This also fixes a subtle bug in the
old logic: we registered cleanups in the logical order of (1) mounts
and then (2) loopbacks, but the cleanup loop walks the registered
calls in reverse order.  This means the loopback cleanup would fail
and timeout because we hadn't unmounted the partitions yet.  The
overall script doesn't fail as cleanup uses `set +e`, but it makes
every script waste ~10 seconds at exit.

BUG=None
TEST=running set_lsb_release.sh on images works quickly now
BRANCH=None

Change-Id: Ibd25ad6ba149c64e08ac3ab860342fe7b2cc7851
Signed-off-by: Mike Frysinger <vapier@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2923825
Reviewed-by: George Engelbrecht <engeg@google.com>