Merge "Add additional documentation in metrics proto regen.sh script."

#!/bin/bash

aprotoc --go_out=paths=source_relative:. metrics.proto

# Generates the golang source file of metrics.proto protobuf file.

set -e

function die() { echo "ERROR: $1" >&2; exit 1; }

readonly error_msg="Maybe you need to run 'lunch aosp_arm-eng && m aprotoc blueprint_tools'?"

if ! hash aprotoc &>/dev/null; then

  die "could not find aprotoc. ${error_msg}"

fi

if ! aprotoc --go_out=paths=source_relative:. metrics.proto; then

  die "build failed. ${error_msg}"

fi