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fastboot: don't print anything in Status() if the input is empty 

Status() is called with an empty string to handle `fastboot oem`
commands.  This currently emits a set of spaces and sets
last_start_time such that the epilog can track the time spent in this
command.  Emitting the spaces is problematic however, since it results
in the follow:

 $ fastboot oem device-info
                                                  (bootloader) Verity mode: false
(bootloader) Device unlocked: true
(bootloader) Device critical unlocked: true
(bootloader) Charger screen enabled: true
OKAY [  0.000s]
Finished. Total time: 0.000s

If we skip emitting the spaces, then we get the correct result:

 $ fastboot oem device-info
(bootloader) Verity mode: false
(bootloader) Device unlocked: true
(bootloader) Device critical unlocked: true
(bootloader) Charger screen enabled: true
OKAY [  0.001s]
Finished. Total time: 0.001s

There are no other uses of Status() with an empty string, so this
changes won't impact other commands.

Bug: 158310284
Test: fastboot formats this and other commands correctly.
Change-Id: I6294acefc65a8399160c0944b3fbc2f2ace919ed
This commit is contained in:
Tom Cherry 2020-06-10 09:29:25 -07:00
parent 71de690f60
commit 2217c50a4f
1 changed files with 4 additions and 2 deletions
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6
fastboot/fastboot.cpp
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@ -200,8 +200,10 @@ static std::string find_item(const std::string& item) {
double last_start_time;
static void Status(const std::string& message) {
static constexpr char kStatusFormat[] = "%-50s ";
fprintf(stderr, kStatusFormat, message.c_str());
if (!message.empty()) {
static constexpr char kStatusFormat[] = "%-50s ";
fprintf(stderr, kStatusFormat, message.c_str());
}
last_start_time = now();
}