Generate vector tiles for Planet with tilemaker

Recipe

# You need a recent curl version. Hence, my path points to a compiler curl version
# The goal is to manage when new MAJ should be done instead of running full processing for nothing
curl_path=/home/thomasg/curl/bin/curl
mydate=$($curl_path -Ls -o /dev/null --head -w "%header{last-modified}" https://planet.openstreetmap.org/pbf/planet-latest.osm.pbf)
current_date=$(date -d "$mydate" +"%Y-%m-%dT%H:%M:%S%:z")

function install_deps {
    sudo apt install --yes build-essential libboost-dev libboost-filesystem-dev libboost-iostreams-dev libboost-program-options-dev libboost-system-dev liblua5.1-0-dev libshp-dev libsqlite3-dev rapidjson-dev lua5.4 liblua5.4-dev zlib1g-dev git unzip htop wget
}

install_deps

if [ ! -f iso-last-call.txt ]; then
    echo $current_date >| iso-last-call.txt
    generate_tiles
fi

if [ -f iso-last-call.txt ]; then
    difference_length=$(diff iso-last-call.txt <(echo $current_date) | wc -l)
    if (( $difference_length > 0 ));
      generate_tiles
    fi
fi


function get_external_ressources {
    if [ -d coastline ]; then
      rm -rf coastline
    fi
    if [ -d landcover ]; then
      rm -rf landcover
    fi
    wget https://osmdata.openstreetmap.de/download/water-polygons-split-4326.zip
    unzip water-polygons-split-4326.zip
    mv water-polygons-split-4326 coastline
    rm water-polygons-split-4326.zip

    wget https://naciscdn.org/naturalearth/10m/cultural/ne_10m_urban_areas.zip
    wget https://naciscdn.org/naturalearth/10m/physical/ne_10m_antarctic_ice_shelves_polys.zip
    wget https://naciscdn.org/naturalearth/10m/physical/ne_10m_glaciated_areas.zip
    mkdir -p landcover
    for i in ne_*.zip;
      do dir_target="${i%.*}";
      unzip -d landcover/$dir_target/ $i;
    done;
}

function generate_tiles {
    if [ -d tilemaker ];
      then cd tilemaker;
          make clean;
          git pull;
      else
          git clone https://github.com/systemed/tilemaker.git;
    fi

    make
    sudo make install

    get_external_ressources

    if [ -f planet-latest.osm.pbf ]; then
        rm planet-latest.osm.pbf;
    fi
    if [ -f planet.mbtiles ]; then
        rm planet.mbtiles;
    fi

    wget https://planet.openstreetmap.org/pbf/planet-latest.osm.pbf
    nohup tilemaker --input planet-latest.osm.pbf \
              --output planet.mbtiles \
              --config resources/config-openmaptiles.json \
              --process resources/process-openmaptiles.lua \
              --store /home/debian/tilemaker-cache &
}