Support fastboot variable 'variant'.

Bug: 79480454
Bug: 78793464
Test: fastboot getvar variant
Change-Id: Iefef82c147d8405318c793ad0a73f00674bbb63d
Merged-In: Iefef82c147d8405318c793ad0a73f00674bbb63d
(cherry picked from commit 4785287a0043ddea2f784433d8a4fc8a168efc79)

1 files changed, 21 insertions, 0 deletions

diff --git a/fastboot/device/variables.cpp b/fastboot/device/variables.cpp
index 002e04349..77cd4bc25 100644
--- a/fastboot/device/variables.cpp
+++ b/fastboot/device/variables.cpp
@@ -74,6 +74,27 @@ bool GetSecure(FastbootDevice* /* device */, const std::vector<std::string>& /*
     return true;
 }
 
+bool GetVariant(FastbootDevice* device, const std::vector<std::string>& /* args */,
+                std::string* message) {
+    auto fastboot_hal = device->fastboot_hal();
+    if (!fastboot_hal) {
+        *message = "Fastboot HAL not found";
+        return false;
+    }
+
+    Result ret;
+    auto ret_val = fastboot_hal->getVariant([&](std::string device_variant, Result result) {
+        *message = device_variant;
+        ret = result;
+    });
+    if (!ret_val.isOk() || ret.status != Status::SUCCESS) {
+        *message = "Unable to get device variant";
+        return false;
+    }
+
+    return true;
+}
+
 bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& /* args */,
                     std::string* message) {
     std::string suffix = device->GetCurrentSlot();