Bash script to batch export Tilemill projects

scripted-tilemill-export.sh

#!/bin/bash

#This script generates one export for each year of a Tilemill project to mbtiles format

#Instructions:
#Run using 'bash tilemill-export.sh [project-name]'
#For more info: http://flipside.org/notes/scripted-tilemill-export

#Assumptions
# - stylesheet = style.mss
# - selector = year

project=${1%/}
#Make sure the field separator is a ','
IFS=$','
range=2001,2002,2003,2004,2005

#Check if a project has been specified
if [ -z $project ]; then
	echo You haven\'t specified a project, please specify one by using: bash tilemill-export.sh \[project\]
	exit
fi

for year in $range
do
	#Change the selector to the year we want to export
	sed -i -r -e 's/ano=2[0-9]{3}/ano='$year'/g' ~/Documents/MapBox/project/$project/style.mss
	#Change the project name and description to include indication of year
	sed -i -r -e 's/\"name\": \"Occurrences\"/\"name\": \"Occurrences '$year'\"/g' ~/Documents/MapBox/project/$project/project.mml
	sed -i -r -e 's/\"description\": \"Occurrences per area\"/\"description\": \"Occurrences per area '$year'\"/g' ~/Documents/MapBox/project/$project/project.mml
	
	#Do the actual export
	/usr/share/tilemill/index.js export $project ~/Documents/$project-$year.mbtiles --bbox='-10.2063,36.5361,-5.8557,42.4640' --format=mbtiles --minzoom=4 --maxzoom=13 --metatile=2

	#and upload it. On project we have to specify a unique name, otherwise MapBox will just overwrite the project each time you upload
	/usr/share/tilemill/index.js export $project-$year ~/Documents/$project-$year.mbtiles --format=upload --syncAccount="" --syncAccessToken=""

	#Change the project name and description back to original
	sed -i -r -e 's/\"name\": \"Occurrences [0-9]{4}\"/\"name\": \"Occurrences\"/g' ~/Documents/MapBox/project/$project/project.mml
	sed -i -r -e 's/\"description\": \"Occurrences per admin area [0-9]{4}\"/\"description\": \"Occurrences per admin area\"/g' ~/Documents/MapBox/project/$project/project.mml  
done