#!/bin/bash
# Copyright 2015-2016, Google Inc.
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#
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
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# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
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# this software without specific prior written permission.
#
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

set -ex

readonly NANOPB_TMP_OUTPUT=$(mktemp -d)
readonly VENV_DIR=$(mktemp -d)
# create a virtualenv for nanopb's compiler
pushd $VENV_DIR
readonly VENV_NAME="nanopb-$(date '+%Y%m%d_%H%M%S_%N')"
virtualenv $VENV_NAME
. $VENV_NAME/bin/activate
popd

# install proto3
pip install protobuf==3.0.0b2

# change to root directory
cd $(dirname $0)/../..

# build clang-format docker image
docker build -t grpc_clang_format tools/dockerfile/grpc_clang_format

# install protoc version 3
pushd third_party/protobuf
apt-get install -y autoconf automake libtool curl
./autogen.sh
./configure
make
make install
ldconfig
popd

if [ ! -x "/usr/local/bin/protoc" ]; then
  echo "Error: protoc not found in path"
  exit 1
fi
readonly PROTOC_PATH='/usr/local/bin'
# stack up and change to nanopb's proto generator directory
pushd third_party/nanopb/generator/proto
PATH="$PROTOC_PATH:$PATH" make

# back to the root directory
popd


# nanopb-compile the proto to a temp location
PATH="$PROTOC_PATH:$PATH" ./tools/codegen/core/gen_load_balancing_proto.sh \
  src/proto/grpc/lb/v0/load_balancer.proto \
  $NANOPB_TMP_OUTPUT

# compare outputs to checked compiled code
diff -rq $NANOPB_TMP_OUTPUT src/core/proto/grpc/lb/v0
if [ $? != 0 ]; then
  echo "Outputs differ: $NANOPB_TMP_OUTPUT vs src/core/proto/grpc/lb/v0"
  exit 1
fi
deactivate