using datumaro to convert voc annotations to cvat

[verasativa]

I'm trying to figure out how datumaro works, and eventually how to integrate to our dvc workflow. But I'm starting with a simple task: convert voc annotations to cvat format.
I'm creating a datumaro dataset with:
pythonw -m datumaro create -d data/datumaro_dataset
then adding the one source with:
pythonw -m datumaro source import -f voc -n v1 -p data/datumaro_dataset/ dir data/Workers/version_1/Annotations
then from the data/datumaro_datasetdir:
pythonw -m datumaro source export -n datumaro_dataset -d ../export -f cvat
but I'm getting a:
KeyError: 'Key "datumaro_dataset" does not exist or a:
FileExistsError: [Errno 17] File exists: '/Users/vera/repositories/workers-detector/data/export'

Questions:
What will be the proper way to do this conversion?
I'm interested on contributing to datumaro; what will be the best communication channel with developers? (no really lucky on gitter)

cc: @zhiltsov-max

[zhiltsov-max]

@verasativa, currently, CVAT format support is not implemented in Datumaro, we are going to do it soon. Once it is supported, to export a dataset you would do:

datum project import -d data/datumaro_dataset -f voc data/Workers/version_1/Annotations
datum project export -p data/datumaro_dataset -f cvat ../export

Your variant with sources is also OK, but it should look like this:

pythonw -m datumaro create -d data/datumaro_dataset
pythonw -m datumaro source import -f voc -n v1 -p data/datumaro_dataset/ dir data/Workers/version_1/Annotations
pythonw -m datumaro source export -n v1 -d ../export -f cvat # note v1 here as source name

KeyError is for non-existing project source which was named v1, not datumaro_dataset.

Regarding FileExistsError: currently we avoid overwriting existing dirs to prevent data loss. We're open for your suggestions on design.