cleanup data-osm/tmp
keep data-osm/tmp after git checkout
add index-clean
fix log-clean
rename log file to ext.log
improve log-clean
check if world/t/data-osm/tmp exists
check for correct tmp path
use 'set -o pipefail' only for internal commands
avoid race conditions for temp files
improve tmp file creation name
do tmp file usage right
cleanup tmp files after exit