osm_pbf_generation.sh

osm_pbf_generation.sh

#!/bin/bash
# script for downloading fresh OSM extract for India and making regional extracts

printf "\n\n$(date)\n"

# This stores absolute path of this shell script into $DIR. Similar to python's root = os.path.dirname(__file__)
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"

# user-set variables
websiteFolder="/var/www/html/dump"

cd "${DIR}/"
echo "working dir: $(pwd)"

echo "Retrieving latest OSM data if updated"
wget -N --timeout=20 http://download.geofabrik.de/asia/india-latest.osm.pbf
# -N : Check server timestamp and skip download if it's the same as local.

echo "Making statewise pbfs. The .poly's are stored under states_poly/"
cd "${DIR}/states_poly/"
# starting for loop
for f in *.poly
do
echo ${f}
a=`echo ${f} | cut -d'.' -f1`
osmconvert ../india-latest.osm.pbf -B=${f} --complete-ways -o="${websiteFolder}"/temp_${a}.pbf
# after creating, rename to proper state file name. To avoid people downloading while its in midst of being created.
mv "${websiteFolder}"/temp_${a}.pbf "${websiteFolder}"/${a}.pbf
echo "$(date): ${a}.pbf created"
done
# end of for loop

# quirk : files were created at the locations but didn't have any read permissions also so weren't downloadable. Fix for that:
chmod 644 "${websiteFolder}"/*.pbf

echo "$(date): done with script"