Imports github.com/golang/protobuf/proto go.chromium.org/luci/common/data/sortby go.chromium.org/luci/common/errors go.chromium.org/luci/common/logging go.chromium.org/luci/common/proto go.chromium.org/luci/common/system/filesystem go.chromium.org/luci/vpython/api/vpython Standard library imports bufio context crypto/sha256 encoding/hex fmt io/ioutil os path/filepath sort strings