#!/usr/bin/env bash
version=2.4.1
directory=scons-${version}
filename=${directory}.tar.gz
url="http://downloads.sourceforge.net/project/scons/scons/${version}/${filename}"

echo
echo 'INFO: Installing third party library SCons 2.4.1'
echo '------------------------------------------------'
echo


if [ -n "${MAUS_ROOT_DIR+x}" ]; then

    if [ -e "${MAUS_ROOT_DIR}/third_party/source/${filename}" ]
    then
      echo "INFO: Found source archive in 'source' directory"
    else
      echo "INFO: Source archive doesn't exist.  Downloading..."
      wget --directory-prefix=${MAUS_ROOT_DIR}/third_party/source ${url}
    fi

    if [ -e "${MAUS_ROOT_DIR}/third_party/source/${filename}" ]
    then

      echo "INFO: Source archive exists."
      echo
      echo "INFO: Checking MD5 checksum (otherwise the file didn't"
      echo "INFO: download properly):"
      echo

      cd ${MAUS_ROOT_DIR}/third_party/source
      md5sum -c ${filename}.md5 || { echo "FATAL: Failed to download:" >&2; echo "FATAL: ${filename}." >&2; echo "FATAL: MD5 checksum failed.">&2; echo "FATAL: Try rerunning this command to redownload, or check" >&2; echo "FATAL: internet connection"  >&2; rm -f ${filename}; exit 1; }
      sleep 1

      echo
      echo "INFO: Unpacking:"
      echo
      rm -Rf ${MAUS_ROOT_DIR}/third_party/build/${directory}
      sleep 1
      tar xvfz ${MAUS_ROOT_DIR}/third_party/source/${filename} -C ${MAUS_ROOT_DIR}/third_party/build > /dev/null
      cd ${MAUS_ROOT_DIR}/third_party/build/${directory}

      echo
      echo "INFO: Installing:"
      echo
      sleep 1
      python setup.py install --prefix=${MAUS_ROOT_DIR}/third_party/install/
    # Create a link to the SCons directory not based on version number
      cd ${MAUS_ROOT_DIR}/third_party/build/
      ln -fs ${directory} scons

      echo
      echo "INFO: The package should be locally build now in your"
      echo "INFO: third_party directory, which the rest of MAUS will"
      echo "INFO: find."

    else
      echo "FATAL: Source archive still doesn't exist.  Please file a bug report with your operating system,">&2
      echo "FATAL: distribution, and any other useful information at:" >&2
      echo "FATAL: " >&2
      echo "FATAL: http://micewww.pp.rl.ac.uk:8080/projects/maus/issues/" >&2
      echo "FATAL:" >&2
      echo "FATAL: Giving up, sorry..." >&2
      exit 1
    fi
else

echo
echo "FATAL: MAUS_ROOT_DIR is not set, which is required to" >&2  
echo "FATAL: know where to install this package.  You have two" >&2 
echo "FATAL: options:" >&2
echo "FATAL:" >&2
echo "FATAL: 1. Set the MAUS_ROOT_DIR from the command line by" >&2 
echo "FATAL: (if XXX is the directory where MAUS is installed):" >&2
echo "FATAL:" >&2 
echo "FATAL:        MAUS_ROOT_DIR=XXX ${0}" >&2
echo "FATAL:" >&2
echo "FATAL: 2. Run the './configure' script in the MAUS ROOT" >&2 
echo "FATAL: directory, run 'source env.sh' then rerun this" >&2  
echo "FATAL: command ">&2
exit 1

fi