build-protos.sh

#!/usr/bin/env bash

# Copyright 2019 The Cirq Developers
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

################################################################################
# Generates python from protobuf definitions, including mypy stubs.
#
# Usage:
#     dev_tools/build-protos.sh
################################################################################

set -e
trap "{ echo -e '\033[31mFAILED\033[0m'; }" ERR

# Get the working directory to the repo root.
cd "$(dirname "${BASH_SOURCE[0]}")"
cd "$(git rev-parse --show-toplevel)"

cd cirq-google || exit $?

# Build protos for each protobuf package.
for package in cirq_google/api/v1 cirq_google/api/v2
do
  python -m grpc_tools.protoc -I=. --python_out=. --mypy_out=. ${package}/*.proto
done

# until this is not merged https://github.com/protocolbuffers/protobuf/pull/7470
# we manually switch to relative import
sed -i -E 's/^from cirq.google.api.* import (.*)$/from . import \1/' cirq_google/api/v*/*_pb2.py