before_install.sh

#!/bin/bash

# Don't source setup.sh here, because the virtualenv might not be set up yet

set -o xtrace

export NUMCORES=`grep -c ^processor /proc/cpuinfo`
if [ ! -n "$NUMCORES" ]; then
  export NUMCORES=`sysctl -n hw.ncpu`
fi
echo Using $NUMCORES cores

# Install dependencies
if [ "$TRAVIS_OS_NAME" == "linux" ]; then
  sudo apt-get update
  APT_INSTALL_CMD='sudo apt-get install -y --no-install-recommends'
  $APT_INSTALL_CMD dos2unix

  function install_protobuf() {
      # Install protobuf
      local pb_dir="$HOME/.cache/pb"
      mkdir -p "$pb_dir"
      wget -qO- "https://github.com/google/protobuf/releases/download/v${PB_VERSION}/protobuf-${PB_VERSION}.tar.gz" | tar -xz -C "$pb_dir" --strip-components 1
      ccache -z
      cd "$pb_dir" && ./configure && make -j${NUMCORES} && make check && sudo make install && sudo ldconfig && cd -
      ccache -s
  }

  install_protobuf

elif [ "$TRAVIS_OS_NAME" == "osx" ]; then
  brew update
  brew install ccache protobuf
  if [ "${PYTHON_VERSION}" == "python3" ]; then
    brew upgrade python
  fi
else
  echo Unknown OS: $TRAVIS_OS_NAME
  exit 1
fi

# TODO consider using "python3.6 -m venv"
# which is recommended by python3.6 and may make some difference
if [ "$TRAVIS_OS_NAME" == "osx" ]; then
  pip install --quiet virtualenv
  virtualenv -p "${PYTHON_VERSION}" "${HOME}/virtualenv"
  source "${HOME}/virtualenv/bin/activate"
fi

# Update all existing python packages
pip install --quiet -U pip setuptools

pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U --quiet