Downloaded/extracted files might be better write-protected

[tomalrussell]

Snakemake can create protected outputs - which are set as read-only. It might make sense for all downloaded files to be created this way to avoid accidental modification or deletion.

There's also a side-effect of opening GeoPackages in fairly recent (but not latest) versions of QGIS (ref) that means the file is modified, which means opening up some files for exploration can end up triggering a lot of downstream jobs. Workarounds include making the file read-only, or running touch -d '-1 week' ./file.gpkg to change the file mtime.