#!/usr/bin/env bash
# Copyright 2015 The TensorFlow Authors. All Rights Reserved.
#
# 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 -o errexit

if [ -d "../org_tensorflow" ]; then
script_path="../org_tensorflow"
else
 # Prefix expected paths with ./ locally and external/reponame/ for remote repos.
 # TODO(kchodorow): remove once runfiles paths are fixed, see
 # https://github.com/bazelbuild/bazel/issues/848.
 script_path=$(dirname $(dirname $(dirname "0ドル")))
 script_path=${script_path:-.}
fi

EXPECTED_PATHS="$script_path/util/python/python_include"\
" $script_path/util/python/python_lib"\
" $script_path/third_party/py/numpy/numpy_include"

function main {
 argument="1ドル"
 shift
case $argument in
 --check)
 check_python
 exit 0
 ;;
 --setup)
 setup_python "1ドル"
 exit 0
 ;;
 esac
}

function python_path {
 "$PYTHON_BIN_PATH" - <<END
from __future__ import print_function
import site
import os

try:
 input = raw_input
except NameError:
 pass

python_paths = []
if os.getenv('PYTHONPATH') is not None:
 python_paths = os.getenv('PYTHONPATH').split(':')
try:
 library_paths = site.getsitepackages()
except AttributeError:
 from distutils.sysconfig import get_python_lib
 library_paths = [get_python_lib()]
all_paths = set(python_paths + library_paths)

paths = []
for path in all_paths:
 if os.path.isdir(path):
 paths.append(path)

if len(paths) == 1:
 print(paths[0])
else:
 ret_paths = ",".join(paths)
 print(ret_paths)
END
}

function default_python_path {
 PYTHON_ARG="1ドル" "$PYTHON_BIN_PATH" - <<END
from __future__ import print_function
import os

default = os.getenv('PYTHON_ARG')
default = str(default)
print(default)
END
}

function setup_python {
 PYTHON_BIN_PATH="1ドル";

 if [ -z "$PYTHON_BIN_PATH" ]; then
echo "PYTHON_BIN_PATH was not provided. Did you run configure?"
 exit 1
 fi
 if [ ! -x "$PYTHON_BIN_PATH" ] || [ -d "$PYTHON_BIN_PATH" ]; then
echo "PYTHON_BIN_PATH is not executable. Is it the python binary?"
 exit 1
 fi

local python_major_version=$("${PYTHON_BIN_PATH}" -c 'from __future__ import print_function; import sys; print(sys.version_info[0]);')
 if [ "$python_major_version" == "" ]; then
echo -e "\n\nERROR: Problem getting python version. Is $PYTHON_BIN_PATH the correct python binary?"
 exit 1
 fi

local python_include="$("${PYTHON_BIN_PATH}" -c 'from __future__ import print_function; from distutils import sysconfig; print(sysconfig.get_python_inc());')"
 if [ "$python_include" == "" ]; then
echo -e "\n\nERROR: Problem getting python include path. Is distutils installed?"
 exit 1
 fi

 if [ -z "$PYTHON_LIB_PATH" ]; then
local python_lib_path
 # Split python_path into an array of paths, this allows path containing spaces
 IFS=','
 python_lib_path=($(python_path))
 unset IFS

 if [ 1 = "$USE_DEFAULT_PYTHON_LIB_PATH" ]; then
PYTHON_LIB_PATH="$(default_python_path "${python_lib_path[0]}")"
 echo "Using python library path: $PYTHON_LIB_PATH"

 else
echo "Found possible Python library paths:"
 for x in "${python_lib_path[@]}"; do
echo " $x"
 done
set -- "${python_lib_path[@]}"
 echo "Please input the desired Python library path to use. Default is ["1ドル"]"
 read b || true
if [ "$b" == "" ]; then
PYTHON_LIB_PATH="$(default_python_path "${python_lib_path[0]}")"
 echo "Using python library path: $PYTHON_LIB_PATH"
 else
PYTHON_LIB_PATH="$b"
 fi
 fi
 fi

 if test -d "$PYTHON_LIB_PATH" -a -x "$PYTHON_LIB_PATH"; then
python_lib="$PYTHON_LIB_PATH"
 else
echo -e "\n\nERROR: Invalid python library path: ${PYTHON_LIB_PATH}."
 exit 1
 fi

local numpy_include=$("${PYTHON_BIN_PATH}" -c 'from __future__ import print_function; import numpy; print(numpy.get_include());')
 if [ "$numpy_include" == "" ]; then
echo -e "\n\nERROR: Problem getting numpy include path. Is numpy installed?"
 exit 1
 fi

 for x in $EXPECTED_PATHS; do
 if [ -e "$x" ]; then
rm -rf "$x"
 fi
 done

# ln -sf is actually implemented as copying in msys since creating symbolic
# links is privileged on Windows. But copying is too slow, so invoke mklink
# to create junctions on Windows.
 if is_windows; then
cmd /c "mklink /J util\\python\\python_include \"${python_include}\""
 cmd /c "mklink /J util\\python\\python_lib \"${python_lib}\""
 cmd /c "mklink /J third_party\\py\\numpy\\numpy_include \"${numpy_include}\""
 else
ln -sf "${python_include}" util/python/python_include
 ln -sf "${python_lib}" util/python/python_lib
 ln -sf "${numpy_include}" third_party/py/numpy/numpy_include
 fi
 # Convert python path to Windows style before writing into bazel.rc
 if is_windows; then
PYTHON_BIN_PATH="$(cygpath -m "$PYTHON_BIN_PATH")"
 fi

 # Write tools/bazel.rc
 echo "# Autogenerated by configure: DO NOT EDIT" > tools/bazel.rc
 sed -e "s/\$PYTHON_MAJOR_VERSION/$python_major_version/g" \
 -e "s[\$PYTHON_BINARY[\"$PYTHON_BIN_PATH\"[g" \
 tools/bazel.rc.template >> tools/bazel.rc
 # Write tools/python_bin_path.sh
 echo "export PYTHON_BIN_PATH=\"$PYTHON_BIN_PATH\"" > tools/python_bin_path.sh
}

PLATFORM="$(uname -s | tr 'A-Z' 'a-z')"
function is_windows() {
 # On windows, the shell script is actually running in msys
 if [[ "${PLATFORM}" =~ msys_nt* ]]; then
true
else
false
fi
}

function check_python {
 for x in $EXPECTED_PATHS; do
 if [ ! -e "$x" ]; then
echo -e "\n\nERROR: Cannot find '${x}'. Did you run configure?\n\n" 1>&2
 exit 1
 fi
 # Don't check symbolic link on Windows
 if ! is_windows && [ ! -L "${x}" ]; then
echo -e "\n\nERROR: '${x}' is not a symbolic link. Internal error.\n\n" 1>&2
 exit 1
 fi
 if is_windows; then
 # In msys, readlink <path> doesn't work, because no symbolic link on
 # Windows. readlink -f <path> returns the real path of a junction.
 true_path=$(readlink -f "${x}")
 else
true_path=$(readlink "${x}")
 fi
 if [ ! -d "${true_path}" ]; then
echo -e "\n\nERROR: '${x}' does not refer to an existing directory: ${true_path}. Do you need to rerun configure?\n\n" 1>&2
 exit 1
 fi
 done
}

main "$@"