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#!/bin/bash

WORK_DIR="$(dirname "$0")"

DISTRO_NAME=$(lsb_release -sc)

OS_REQUIREMENTS_FILENAME="requirements-$DISTRO_NAME.apt"

cd $WORK_DIR

# Check if a requirements file exist for the current distribution.

if [ ! -r "$OS_REQUIREMENTS_FILENAME" ]; then

cat <<-EOF >&2

There is no requirements file for your distribution.

You can see one of the files listed below to help search the equivalent package in your system:

$(find ./ -name "requirements-*.apt" -printf " - %f\n")

EOF

exit 1;

# Handle call with wrong command

function wrong_command()

{

echo "${0##*/} - unknown command: '${1}'" >&2

usage_message

}

# Print help / script usage

function usage_message()

{

cat <<-EOF

Usage: $WORK_DIR/${0##*/} <command>

Available commands are:

list Print a list of all packages defined on ${OS_REQUIREMENTS_FILENAME} file

help Print this help

Commands that require superuser permission:

install Install packages defined on ${OS_REQUIREMENTS_FILENAME} file. Note: This

does not upgrade the packages already installed for new versions, even if

new version is available in the repository.

upgrade Same that install, but upgrade the already installed packages, if new

version is available.

EOF

}

# Read the requirements.apt file, and remove comments and blank lines

function list_packages(){

grep -v "#" "${OS_REQUIREMENTS_FILENAME}" | grep -v "^$";

}

function install_packages()

{

list_packages | xargs apt-get --no-upgrade install -y;

}

function upgrade_packages()

{

list_packages | xargs apt-get install -y;

}

function install_or_upgrade()

{

P=${1}

PARAN=${P:-"install"}

if [[ $EUID -ne 0 ]]; then

cat <<-EOF >&2

You must run this script with root privilege

Please do:

sudo $WORK_DIR/${0##*/} $PARAN

EOF

exit 1

else

apt-get update

# Install the basic compilation dependencies and other required libraries of this project

if [ "$PARAN" == "install" ]; then

install_packages;

else

upgrade_packages;

# cleaning downloaded packages from apt-get cache

apt-get clean

exit 0

}

# Handle command argument

case "$1" in

install) install_or_upgrade;;

upgrade) install_or_upgrade "upgrade";;

list) list_packages;;

help|"") usage_message;;

*) wrong_command "$1";;

esac

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