#!/usr/bin/env bash
# Copyright 2017 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.
# ==============================================================================

setglobal TF_PREFIX = ''/usr/local''

proc usage {
    echo "Usage: $0 OPTIONS"
    echo -e "-p, --prefix\tset installation prefix (default: /usr/local)"
    echo -e "-v, --version\tset TensorFlow version"
    echo -e "-h, --help\tdisplay this message"
}

test $Argc == 0 && usage && exit 0

# read the options
setglobal ARGS = $[getopt -o p:v:h --long prefix:,version:,help -n $0 -- @Argv]
eval set -- $ARGS

# extract options and their arguments into variables.
while true {
    match $1 {
        with -h|--help usage ; exit 
        with -p|--prefix
            match $2 {
                with "" shift 2 
                with * setglobal TF_PREFIX = $2 ; shift 2 
            } 
        with -v|--version
            match $2 {
                with "" shift 2 
                with * setglobal TF_VERSION = $2 ; shift 2 
            } 
        with -- shift ; break 
        with * echo "Internal error! Try '$0 --help' for more information." ; exit 1 
    }
}

test -z $TF_VERSION && echo "Specify a version using -v or --version" && exit 1

echo "Generating pkgconfig file for TensorFlow $TF_VERSION in $TF_PREFIX"

cat << """ > tensorflow.pc
prefix=$(TF_PREFIX)
exec_prefix='$'{prefix}
libdir='$'{exec_prefix}/lib
includedir='$'{prefix}/include

Name: TensorFlow
Version: $(TF_VERSION)
Description: Library for computation using data flow graphs for scalable machine learning
Requires:
Libs: -L'$'{libdir} -ltensorflow
Cflags: -I'$'{includedir}
"""
> tensorflow.pc
prefix=${TF_PREFIX}
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: TensorFlow
Version: ${TF_VERSION}
Description: Library for computation using data flow graphs for scalable machine learning
Requires:
Libs: -L\${libdir} -ltensorflow
Cflags: -I\${includedir}
EOF