#!/bin/bash
  
  set -e
  
  #export JAVA_HOME=/LOCATION_ON_YOUR_MACHINE/java/jdk1.8.0_121
  PATH=$PWD/bazel/output:$PATH
  export HOME=$PWD/tensorflow_build/
  mkdir -p $HOME
  
  java=`which java`
  if [ -z "$JAVA_HOME" ]; then
    java=$JAVA_HOME/bin/java
  fi
  
  java_version=`$java -version 2>&1 | head -n 1 | awk '{print $3}' | sed s=\"==g`
  good_version=`echo 1.8 $java_version | awk '{if($1<$2)print 1; else print 0}'`
  if [ $good_version -eq 0 ]; then
    echo You have jdk version = $java_version, which is older than 1.8
    echo You need to download a later than 1.8 JDK version at
    echo http://www.oracle.com/technetwork/pt/java/javase/downloads/jdk8-downloads-2133151.html
    echo and set your JAVA_HOME to point to where it is installed
    exit 1
  else
    echo You have jdk version = $java_version, which is newer than 1.8. We will continue the installation
  fi
  
  
  [ ! -f bazel.zip ] && wget https://github.com/bazelbuild/bazel/releases/download/0.15.0/bazel-0.15.0-dist.zip -O bazel.zip
  mkdir -p bazel
  cd bazel
  unzip ../bazel.zip
  ./compile.sh
  cd ../
  
  # now bazel is built
  [ ! -d tensorflow ] && git clone https://github.com/tensorflow/tensorflow
  cd tensorflow
  git fetch --tags
  git checkout r1.12
  ./configure
  
  tensorflow/contrib/makefile/download_dependencies.sh
  bazel build -c opt //tensorflow:libtensorflow.so
  bazel build -c opt //tensorflow:libtensorflow_cc.so
  
  echo Building tensorflow completed. You will need to go to kaldi/src/ and do
  echo \"make\" under tfrnnlm/ and tfrnnlmbin/ to generate the binaries
  exit
  # the following would utilize the highest optimization but might not work in a
  # grid where each machine might have different configurations
  bazel build --config=opt //tensorflow:libtensorflow.so
  bazel build --config=opt //tensorflow:libtensorflow_cc.so