[PATCH 0/3] Allow easy re-running of grub-shell from failed tests

[Glenn Washburn]

When a non-native (eg. grub-shell/qemu) test fails it can be useful to be
able to re-run the grub-shell invocation in at least two circumstances.

1. The tester wants to re-run the grub-shell invocation with extra args so
   that QEMU starts in GDB attach mode for using GDB to debug the test case
2. For a tester who wants to send a failed test case to another developer for
   additional debugging. It would be nice to be able to just zip/tar just
   the failed test case test output directory and allow the extracted
   directory to easily run the failed test case again. The results in this
   case still might not be the same if the sender and reciever do not have
   the same QEMU. Though when the QMEU versions are different, I expect the
   emulated execution on sender and reciever to be close enough to produce
   the same execution path (maybe not with super old QEMUs, but I don't think
   its something to be concerned about).

The first patch is needed to make the other two useful. Without it, I know of
no easy way to enable grub-shell's debug mode when run via `make check`. And
if grub-shell is not in debug mode then it will remove most/all of the
generated files, which would prevent debugging.

Glenn

Glenn Washburn (3):
  tests: Allow turning on shell tracing from environment variables
  grub-shell: Create run.sh in working directory for easily running test
    again
  grub-shell: Add $GRUB_QEMU_OPTS to run.sh to easily see unofficial
    QEMU arguments

 tests/util/grub-fs-tester.in |  2 ++
 tests/util/grub-shell.in     | 37 +++++++++++++++++++++++++++++-------
 2 files changed, 32 insertions(+), 7 deletions(-)

-- 
2.34.1