tree c7da07188e5cf8cdb0f3c95b82bd844c39bd14ad
parent 0bdff2baa748c99e6306c707eb673fc292ec9833
author Benjamin Gordon <bmgordon@chromium.org> 1527024531 -0600
committer chrome-bot <chrome-bot@chromium.org> 1527626259 -0700

sdk_stages: Don't pass empty command in SDKTest

When creating the new-sdk-chroot, SDKTest runs a chroot command that
doesn't actually run a command.  It relies on the side effect of
cros_sdk creating the chroot before running the non-existent command.

The empty command results in entering the chroot and running bash.  On
the builders where stdin isn't attached to a terminal, bash immediately
exits and this succeeds.  On local builds, this causes the tryjob to
hang inside the chroot because stdin is normally attached to a tty.

Instead of running no command, run /bin/true to get the same
chroot-creation effect without any dependence on stdin's status.

BUG=chromium:837330
TEST=cros tryjob --local chromiumos-sdk-tryjob

Change-Id: I835920a7bf66437cbab0d49e0162723114e894a8
Reviewed-on: https://chromium-review.googlesource.com/1071877
Commit-Ready: Benjamin Gordon <bmgordon@chromium.org>
Tested-by: Benjamin Gordon <bmgordon@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>