Adding the option of maintaining different versions of recipes means there could be multiple versions of a dataset installed at once. We could use a post-link script (http://conda.pydata.org/docs/building/build-scripts.html) to handle this by removing old versions. We could also maintain those other versions (updating the environment variable to the most recently installed version) and allow them to be access via the ggd list-files command.
Adding the option of maintaining different versions of recipes means there could be multiple versions of a dataset installed at once. We could use a post-link script (http://conda.pydata.org/docs/building/build-scripts.html) to handle this by removing old versions. We could also maintain those other versions (updating the environment variable to the most recently installed version) and allow them to be access via the ggd list-files command.