#!/bin/bash

# Copyright 2012 Universidad Nacional de Córdoba

#

# This file is part of Koha.

#

# Koha is free software; you can redistribute it and/or modify it under the

# terms of the GNU General Public License as published by the Free Software

# Foundation; either version 2 of the License, or (at your option) any later

# version.

#

# Koha 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 Koha; if not, write to the Free Software Foundation, Inc.,

# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

usage() {

    local scriptname=$(basename $0)

    cat <<EOF

$scriptname

Query for missing dependencies. Install them if specified.

Usage:

$scriptname -c

$scriptname -i

$scriptname -h

    -c | --check      Query for missing dependencies

    -i | --install    Install the missing dependencies

    -h | --help       Display this help message

EOF

}

# Check if the package is installed

packageInstalled() {

  local package=$1

  return `dpkg -s $package 2>1&>  /dev/null`

}

# Get the installed package version

getPackageVersion() {

  local package=$1

  dpkg-query -W $package | cut -f2

}

# Loop over parameters

while [ $1 ]; do

    case $1 in

        -c | --check )

            shift

            CHECK=yes

            ;;

        -i | --install )

            shift

            INSTALL=yes

            ;;

        -h | --help)

            HELP=yes

            ;;

        * )

            usage

            exit 1

    esac

    shift

done

if [ "$HELP" = "yes" ]; then

    usage

    exit 0

fi

# Determine what directory this script is in, the packages files

# should be in the same path.

DIR=`dirname $0`

# Determine the Ubuntu release

UBUNTU_RELEASE=`lsb_release -r | cut -f2 -d'	'`

UBUNTU_PACKAGES=$DIR/ubuntu.$UBUNTU_RELEASE.packages

# Check for the release-specific packages file. Default to the general one

# but warn the user about LTS releases recommended

if [ ! -e $UBUNTU_PACKAGES ]; then

    UBUNTU_PACKAGES=$DIR/ubuntu.packages

    echo "There's no packages file for your distro/release"

    echo "WARNING! We strongly recommend an LTS release."

fi

echo "Using the $UBUNTU_PACKAGES file."

if [ "$CHECK" = "yes" ]; then

    # We where asked to print the packages list and current versions (if any)

    UBUNTU_PACKAGES_LIST=`awk '{print $1}' $UBUNTU_PACKAGES | grep -v '^\s*#' | grep -v '^\s*$'`

    for PACKAGE in $UBUNTU_PACKAGES_LIST

    do

      UBUNTU_PKG_POLICY=`packageInstalled $PACKAGE`

      if [ `packageInstalled $PACKAGE` ]; then

        UBUNTU_PKG_POLICY="Installed: (none)"

      else

        PACKAGE_VERSION=`getPackageVersion $PACKAGE`

        UBUNTU_PKG_POLICY="Installed: ($PACKAGE_VERSION)"

      fi

      UBUNTU_PKG_VERSION=`echo $UBUNTU_PKG_POLICY | awk '{print $2}'`

      echo "$PACKAGE = $UBUNTU_PKG_VERSION"

    done

fi

if [ "$INSTALL" = "yes" ]; then

    # We where asked to issue the apt-get command for the packages.

    UBUNTU_PACKAGES_LIST=`awk '{print $1}' $UBUNTU_PACKAGES | grep -v '^\s*#' | grep -v '^\s*$'`

    echo "Packages to be installed: "

    echo "$UBUNTU_PACKAGES_LIST"

    echo -n "Proceed (You'll be prompted to type your password)? (Y/n): "

    read answer

    if [ $answer ] && [ $answer != "Y" ] && [ $answer != "y" ]; then

        echo "Aborting"

        exit 1

    else

        sudo apt-get install $UBUNTU_PACKAGES_LIST

    fi

fi

exit 0