build-support/thrift/thriftw

#!/usr/bin/env bash
# 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
#
#     http://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.
#
# Wrapper for thrift that attempts to use the system thrift if it's of the expected version,
# otherwise it bootstraps a new one.
set -e -u

if [[ $# -lt 1 ]]; then
  cat <<EOF
Usage: thriftw EXPECTED_THRIFT_VERSION THRIFT_ARGS...

Run the thrift compiler at EXPECTED_THRIFT_VERSION with THRIFT_ARGS, bootstrapping if necessary.
EOF
fi
expected_version=$1
shift

HERE=$(cd `dirname "${BASH_SOURCE[0]}"` && pwd)

if which thrift >/dev/null 2>&1; then
  if [[ $(thrift --version) = "Thrift version $expected_version" ]]; then
    exec thrift "$@"
  fi
fi

thrift="$HERE"/thrift-$expected_version/compiler/cpp/thrift
if [[ ! -x "$thrift" ]]; then
  make -C "$HERE"
fi
exec "$thrift" "$@"