Put result on standard out if no --output option specified?

[bertfrees]

This is how curl works. This would be a nice-to-have addition because this way you can do things like:

dp2 results --zipped myjob | unzip

This is a lame example because you can accomplish exactly the same with dp2 results myjob. But if the CLI would support downloading single files, not only ZIPs, it would open up more useful possibilities.

What's not so nice is that when you accidentally forget the --output argument you get a lot of output in your terminal, and in case of a ZIP, a lot of binary output. So maybe a better idea would be to do it the wget way, namely support - as your output file:

dp2 results --zipped --output - myjob

Currently this simply creates a ZIP file named "-". With the desired behavior the --zipped argument becomes redundant.

[bertfrees]

Note that all other messages should be put on standard error.

[bertfrees]

Similarly we could read from standard in if - is used instead of a file path, e.g. --source -.