[DO NOT MERGE] Add rbesetup.sh script to Q branch

Bug: b/166182389
Merged-In: I2413a3648e9b2ff680cab6fededc07bbdd43378f
Change-Id: I2413a3648e9b2ff680cab6fededc07bbdd43378f

rbesetup.sh

@@ -0,0 +1,43 @@
+source build/envsetup.sh
+# This function prefixes the given command with appropriate variables needed
+# for the build to be executed with RBE.
+function use_rbe() {
+  local RBE_LOG_DIR="/tmp"
+  local RBE_BINARIES_DIR="prebuilts/remoteexecution-client/latest"
+  local DOCKER_IMAGE="gcr.io/androidbuild-re-dockerimage/android-build-remoteexec-image@sha256:582efb38f0c229ea39952fff9e132ccbe183e14869b39888010dacf56b360d62"
+  # Do not set an invocation-ID and let reproxy auto-generate one.
+  USE_RBE="true" \
+  FLAG_server_address="unix:///tmp/reproxy_$RANDOM.sock" \
+  FLAG_exec_root="$(gettop)" \
+  FLAG_platform="container-image=docker://${DOCKER_IMAGE}" \
+  RBE_use_application_default_credentials="true" \
+  RBE_log_dir="${RBE_LOG_DIR}" \
+  RBE_reproxy_wait_seconds="20" \
+  RBE_output_dir="${RBE_LOG_DIR}" \
+  RBE_log_path="text://${RBE_LOG_DIR}/reproxy_log.txt" \
+  RBE_CXX_EXEC_STRATEGY="remote_local_fallback" \
+  RBE_cpp_dependency_scanner_plugin="${RBE_BINARIES_DIR}/dependency_scanner_go_plugin.so" \
+  RBE_DIR=${RBE_BINARIES_DIR} \
+  RBE_re_proxy="${RBE_BINARIES_DIR}/reproxy" \
+  $@
+}
+# This function detects if the uploader is available and sets the path of it to
+# ANDROID_ENABLE_METRICS_UPLOAD.
+function _export_metrics_uploader() {
+  local uploader_path="$(gettop)/vendor/google/misc/metrics_uploader_prebuilt/metrics_uploader.sh"
+  if [ -x "${uploader_path}" ]; then
+    export ANDROID_ENABLE_METRICS_UPLOAD="${uploader_path}"
+  fi
+}
+# This function sets RBE specific environment variables needed for the build to
+# executed by RBE. This file should be sourced once per checkout of Android code.
+function _set_rbe_vars() {
+  unset USE_GOMA
+  export USE_RBE="true"
+  export RBE_CXX_EXEC_STRATEGY="remote_local_fallback"
+  export RBE_JAVAC=1
+  export RBE_R8=1
+  export RBE_D8=1
+}
+_export_metrics_uploader
+_set_rbe_vars