From 0abd437f6fd995ee3a96ae57c8421e6c6a3a9218 Mon Sep 17 00:00:00 2001
From: Dan Willemsen <dwillemsen@google.com>
Date: Mon, 15 Oct 2018 22:06:54 -0700
Subject: [PATCH] Unset BUILD_NUMBER in build_test.bash

To make build server incrementals of build_test actually incremental.

Test: Set different BUILD_NUMBERs, run build_test.bash --incremental
Change-Id: Ice0e9a6f6c1dd3a3e0332b98081e82a3df74ce59
---
 build_test.bash | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/build_test.bash b/build_test.bash
index 4c43224ce..ee979e7cb 100755
--- a/build_test.bash
+++ b/build_test.bash
@@ -27,6 +27,10 @@
 # that's detected in the Go code, which skips calculating the startup time.
 export TRACE_BEGIN_SOONG=$(date +%s%N)
 
+# Remove BUILD_NUMBER so that incremental builds on build servers don't
+# re-read makefiles every time.
+unset BUILD_NUMBER
+
 export TOP=$(cd $(dirname ${BASH_SOURCE[0]})/../..; PWD= /bin/pwd)
 cd "${TOP}"
 source "${TOP}/build/soong/scripts/microfactory.bash"