#!/bin/bash
set -e

CRAN=${CRAN_SOURCE:-"https://cloud.r-project.org"}

# a function to install apt packages only if they are not installed
function apt_install() {
    if ! dpkg -s "$@" >/dev/null 2>&1; then
        if [ "$(find /var/lib/apt/lists/* | wc -l)" = "0" ]; then
            apt-get update
        fi
        apt-get install -y --no-install-recommends "$@"
    fi
}

# always set this for scripts but don't declare as ENV..
export DEBIAN_FRONTEND=noninteractive
apt_install \
    software-properties-common \
    gnupg2 \
    curl \
    ca-certificates

# Adding the ubuntugis-unstable PPA
add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable

## in UNSTABLE, we will install everything from source by default:
echo "options(repos = c(CRAN = '${CRAN}'))" >>"${R_HOME}/etc/Rprofile.site"

## install geospatial pakages
/rocker_scripts/install_geospatial.sh

# Clean up
rm -rf /var/lib/apt/lists/*