#! /bin/bash

#
# Installation script for pyQuil.
#
# See CK LICENSE for licensing details.
# See CK COPYRIGHT for copyright details.
#

# PACKAGE_DIR
# PACKAGE_VERSION
# INSTALL_DIR
#
# PYTHON_PACKAGE_NAME
# PIP_INSTALL_OPTIONS
# GIT_SRC_URL

echo "**************************************************************"
echo "Installing pyQuil package and its dependencies ..."

GIT_SRC_DIR=${INSTALL_DIR}/src

    # This is where pip will install the modules.
    # It has its own funny structure we don't control :
    #
EXTRA_PYTHON_SITE=${INSTALL_DIR}/python_deps_site

SHORT_PYTHON_VERSION=`${CK_ENV_COMPILER_PYTHON_FILE} -c 'import sys;print(sys.version[:3])'`
export PACKAGE_LIB_DIR="${EXTRA_PYTHON_SITE}/lib/python${SHORT_PYTHON_VERSION}/site-packages"
export PYTHONPATH=$PACKAGE_LIB_DIR:$PYTHONPATH


######################################################################################
echo ""
echo "Cleaning up ${EXTRA_PYTHON_SITE} and ${GIT_SRC_DIR} ..."
rm -rf "${EXTRA_PYTHON_SITE}" "${GIT_SRC_DIR}"

######################################################################################

if [ -z "${PACKAGE_VERSION}" ]; then
    PACKAGE_COMMIT=master
else 
    PACKAGE_COMMIT=v${PACKAGE_VERSION}
fi
echo "Cloning ${PACKAGE_COMMIT} @ ${PYTHON_PACKAGE_NAME} into ${GIT_SRC_DIR} ..."
git clone -b $PACKAGE_COMMIT $GIT_SRC_URL $GIT_SRC_DIR

######################################################################################
echo "Installing ${PYTHON_PACKAGE_NAME} to '${PACKAGE_LIB_DIR}' ..."

EXAMPLE_REQ=`ls -1 $GIT_SRC_DIR/examples/requirements.txt 2>/dev/null`

${CK_ENV_COMPILER_PYTHON_FILE} -m pip install $GIT_SRC_DIR ${EXAMPLE_REQ:+"--requirement=${EXAMPLE_REQ}"} --prefix=${EXTRA_PYTHON_SITE} ${PIP_INSTALL_OPTIONS}

if [ "${?}" != "0" ] ; then
  echo "Error: installation failed!"
  exit 1
fi

    # Because we have to provide a fixed name via meta.json ,
    # and $PACKAGE_LIB_DIR depends on the Python version,
    # we solve it by creating a symbolic link with a fixed name.
    #
ln -s $PACKAGE_LIB_DIR ${INSTALL_DIR}/build