#!/bin/sh
#############################################################################
# Copyright (c) 2022 Balazs Scheidler <bazsi77@gmail.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
# As an additional exemption you are allowed to compile & link against the
# OpenSSL libraries as published by the OpenSSL project. See the file
# COPYING for details.
#
#############################################################################

prefix=@prefix@
exec_prefix=@exec_prefix@
bindir=@bindir@
sysconfdir=@sysconfdir@
localstatedir=@localstatedir@
python_venvdir=@python_venvdir@
python_moduledir=@python_moduledir@


# read the options
TEMP=`getopt -n $0 -o yh --long ,help -- "$@"`
eval set -- "$TEMP"

# extract options and their arguments into variables.
display_prompt=1
while true ; do
    case "$1" in
        -y)
            display_prompt=0
            break
            ;;
        -h|--help)
            echo "Usage:"
            echo "  $0 [options]"
            echo ""
            echo "Fetch and install/upgrade syslog-ng Python requirements"
            echo "into our private virtualenv at ${python_venvdir}"
            echo ""
            echo "Options:"
            echo "  -h or --help    This help screen"
            echo "  -y              Continue automatically at interactive prompts"
            exit 0
            ;;
        --) shift ; break ;;
        *) echo "Error parsing arguments" ; exit 1 ;;
    esac
done

set -e

REQUIREMENTS_FILE=${python_moduledir}/requirements.txt
SYSTEM_PYTHON=@PYTHON@
VENV_PYTHON=${python_venvdir}/bin/python

if [ "$display_prompt" -ne 0 ]; then
    cat <<EOF
This script will download 3rd party packages from the Python Package Index
(PyPI) using the pip tool.  The installation of these packages will cause
build/postinst scripts to be executed as the `whoami` user on this system.

Press [ENTER] to confirm or Ctrl-C to terminate this script.
EOF
    read enter
fi


echo "Creating or updating syslog-ng Python virtualenv in ${python_venvdir}"
echo "Running python -m venv..."
${SYSTEM_PYTHON} -m venv ${python_venvdir}

echo "Running python -m pip install..."
${VENV_PYTHON} -m pip install --upgrade pip
${VENV_PYTHON} -m pip install --upgrade pip setuptools
${VENV_PYTHON} -m pip install --upgrade -r "${REQUIREMENTS_FILE}"
cp "${REQUIREMENTS_FILE}" "${python_venvdir}"
echo "Finished."
