Download sky_engine and sky_services from cloud storage
Downloading these packages from cloud storage simplifies our deployment
story because we can upload to cloud storage automatically from the
buildbot.
This patch also switches the responsibility for downloading the engine
artifacts to update_engine.sh. Centralizing this responsibility ensures
that the packages and the binaries are always in sync.
diff --git a/bin/cache/update_dart_sdk.sh b/bin/cache/update_dart_sdk.sh
index 8eac7a3..b590d8b 100755
--- a/bin/cache/update_dart_sdk.sh
+++ b/bin/cache/update_dart_sdk.sh
@@ -5,6 +5,8 @@
set -e
+FLUTTER_ROOT=$(dirname $(dirname $(dirname "${BASH_SOURCE[0]}")))
+
DART_SDK_PATH="$FLUTTER_ROOT/bin/cache/dart-sdk"
DART_SDK_STAMP_PATH="$FLUTTER_ROOT/bin/cache/dart-sdk.stamp"
DART_SDK_VERSION=`cat "$FLUTTER_ROOT/bin/cache/dart-sdk.version"`
