The shark executable also can work with markdown documents. Two blocks can be
used to run shell-like commands within your markdown documents. The first is
shark-build commands. These allow you to specify a build script that is then
built and can be referenced as the context for future shark-run blocks.
((from ghcr.io/osgeo/gdal:ubuntu-small-3.6.3@sha256:bfa7915a3ef942b4f6f61223ee57eadbb469d6fb4a5fbf562286d1473f15eaab)
(run (shell "mkdir -p /data && echo 'Something for the log!'")))
Once we have a GDAL environment available to us, we can write shell fragments using that environment.
$ gdalinfo --version > /data/gdal.version
$ curl -s https://france-geojson.gregoiredavid.fr/repo/regions/occitanie/region-occitanie.geojson > /data/region-occitanie.geojson
Shark keeps track of inputs and outputs. In the next code block, Shark knows to wire
up /data/gdal.version into the container.
$ cat /data/gdal.version
Shark allows you to export data directly from the Shark world using a publish block. By default
this will publish to a _shark directory in the current working directory. Use the same file path
conventions to export data blobs.
/data/gdal.version