setup.sh

#! /bin/bash

set -x
set -e

SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
pushd "$SCRIPT_DIR" >/dev/null

#Parse command line arguments
downloadHighPolySuv=true
if [[ $1 == "--no-full-poly-car" ]]; then
    downloadHighPolySuv=false
fi

#get sub modules
git submodule update --init --recursive

#give user perms to access USB port - this is not needed if not using PX4 HIL
#TODO: figure out how to do below in travis
if [ "$(uname)" == "Darwin" ]; then
    if [[ ! -z "${whoami}" ]]; then #this happens when running in travis
        sudo dseditgroup -o edit -a `whoami` -t user dialout
    fi

    #below takes way too long
    # brew install llvm@3.9
    brew install --force-bottle homebrew/versions/llvm39
else
    if [[ ! -z "${whoami}" ]]; then #this happens when running in travis
        sudo /usr/sbin/useradd -G dialout $USER
        sudo usermod -a -G dialout $USER
    fi

    #install clang and build tools
    sudo apt-get install -y build-essential
    sudo apt-get install cmake
    wget -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
    sudo apt-get update
    sudo apt-get install -y clang-3.9 clang++-3.9
fi

# Download high-polycount SUV model
if [ ! -d "Unreal/Plugins/AirSim/Content/VehicleAdv" ]; then
    mkdir -p "Unreal/Plugins/AirSim/Content/VehicleAdv"
fi
if [ ! -d "Unreal/Plugins/AirSim/Content/VehicleAdv/SUV" ]; then
    if $downloadHighPolySuv; then
        echo "*********************************************************************************************"
        echo "Downloading high-poly car assets.... The download is ~300MB and can take some time."
        echo "To install without this assets, re-run setup.sh with the argument --no-full-poly-car"
        echo "*********************************************************************************************"
        
        if [ -d "suv_download_tmp" ]; then
            rm -rf "suv_download_tmp"
        fi
        mkdir -p "suv_download_tmp"
        cd suv_download_tmp
        wget https://github.com/mitchellspryn/AirsimHighPolySuv/releases/download/V1.0.1/SUV.zip
        unzip SUV.zip -d ../Unreal/Plugins/AirSim/Content/VehicleAdv
        cd ..
        rm -rf "suv_download_tmp" 
    else
        echo "Not downloading high-poly car asset. The default unreal vehicle will be used."
    fi
fi

# Below is alternative way to get cland by downloading binaries
# get clang, libc++
# sudo rm -rf llvm-build
# mkdir -p llvm-build/output
# wget "http://releases.llvm.org/4.0.1/clang+llvm-4.0.1-x86_64-linux-gnu-debian8.tar.xz"
# tar -xf "clang+llvm-4.0.1-x86_64-linux-gnu-debian8.tar.xz" -C llvm-build/output

# #other packages - not need for now
# #sudo apt-get install -y clang-3.9-doc libclang-common-3.9-dev libclang-3.9-dev libclang1-3.9 libclang1-3.9-dbg libllvm-3.9-ocaml-dev libllvm3.9 libllvm3.9-dbg lldb-3.9 llvm-3.9 llvm-3.9-dev llvm-3.9-doc llvm-3.9-examples llvm-3.9-runtime clang-format-3.9 python-clang-3.9 libfuzzer-3.9-dev

#get libc++ source
if [[ ! -d "llvm-source-39" ]]; then 
    git clone --depth=1 -b release_39  https://github.com/llvm-mirror/llvm.git llvm-source-39
    git clone --depth=1 -b release_39  https://github.com/llvm-mirror/libcxx.git llvm-source-39/projects/libcxx
    git clone --depth=1 -b release_39  https://github.com/llvm-mirror/libcxxabi.git llvm-source-39/projects/libcxxabi
else
    echo "folder llvm-source already exists, skipping git clone..."
fi

#build libc++
sudo rm -rf llvm-build
mkdir -p llvm-build
pushd llvm-build >/dev/null

export C_COMPILER=clang-3.9
export COMPILER=clang++-3.9

cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} \
      -LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF -DLIBCXX_INSTALL_EXPERIMENTAL_LIBRARY=OFF \
      -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=./output \
            ../llvm-source-39

make cxx

#install libc++ locally in output folder
sudo make install-libcxx install-libcxxabi 

popd >/dev/null

#install EIGEN library
sudo rm -rf ./AirLib/deps/eigen3/Eigen
echo "downloading eigen..."
wget http://bitbucket.org/eigen/eigen/get/3.3.2.zip
unzip 3.3.2.zip -d temp_eigen
mkdir -p AirLib/deps/eigen3
mv temp_eigen/eigen*/Eigen AirLib/deps/eigen3
rm -rf temp_eigen
rm 3.3.2.zip

popd >/dev/null

set +x
echo ""
echo "************************************"
echo "AirSim setup completed successfully!"
echo "************************************"