#!/bin/bash
# Copyright 2019 Google LLC
#
# 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.

set -e

PYTHON_BIN_PATH=`which python`

if [[ $PYTHON_BIN_PATH ]] && $PYTHON_BIN_PATH -c "import tensorflow" &>/dev/null; then
  TF_CFLAGS=$($PYTHON_BIN_PATH -c 'import tensorflow as tf; print(" ".join(tf.sysconfig.get_compile_flags()))')
  TF_LFLAGS=$($PYTHON_BIN_PATH -c 'import tensorflow as tf; print(" ".join(tf.sysconfig.get_link_flags()))')

  TF_HEADER_DIR=${TF_CFLAGS%% *}
  TF_HEADER_DIR=${TF_HEADER_DIR#-I}
  TF_SHARED_LIBRARY_DIR=${TF_LFLAGS%% *}
  TF_SHARED_LIBRARY_DIR=${TF_SHARED_LIBRARY_DIR#-L}
  TF_SHARED_LIBRARY_NAME=${TF_LFLAGS##* -l:}
else
  TF_HEADER_DIR=
  TF_SHARED_LIBRARY_DIR=
  TF_SHARED_LIBRARY_NAME=
fi

{
  printf 'build --action_env PYTHON_BIN_PATH="%s"\n' "$PYTHON_BIN_PATH"
  printf 'build --action_env TF_HEADER_DIR="%s"\n' "$TF_HEADER_DIR"
  printf 'build --action_env TF_SHARED_LIBRARY_DIR="%s"\n' "$TF_SHARED_LIBRARY_DIR"
  printf 'build --action_env TF_SHARED_LIBRARY_NAME="%s"\n' "$TF_SHARED_LIBRARY_NAME"
} >configure.bazelrc

echo "Set up configure.bazelrc. Make sure to include it in your .bazelrc file."