download_file progress bar

[jsta]

Is there any interest in adding a progress bar to download_file?

[MattReimer]

Absolutely, but it's important to make sure it's optional somehow so if we're capturing output to a log file on a server we can turn it off or make it more useful than 1000 lines of ==============

My own sloppy attempt for our tools is here:
https://github.com/Riverscapes/sqlBRAT/blob/master/lib/util.py#L154-L226

In our case I keep a NO_UI environment variable and then change the behaviour to make it a little more log-friendly. This works for our automation pipelines but you could use something like a boolean parameter too.

[jsta]

Makes sense. Sounds like it should be off by default.