futility: updater: Revise verbosity and error messages
`futility` used to print debug messages to stdout, but there is a side
effect that stdout may be buffered and then flush later than stderr.
For example, when calling futility via ssh, we will see flashrom
messages before any of futility's own messages.
Also, many people want to get flashrom verbose messages (-V).
With this change, when calling ERROR and DEBUG, we will always output to
stderr. This also enables better parameter type checking.
`-d` and `-v` both contribute to verbosity, that will be converted to
-V's when calling flashrom.
BUG=chromium:875551
TEST=make futil; tests/futility/run_test_scripts.sh $(pwd)/build/futility
BRANCH=None
Change-Id: I1d22a8054fc43cdc5e6c7415e131cc9826fbff0c
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1251145
5 files changed
