When forgetting to specify an input file, tippecanoe hangs

[wolfiex]

It would be useful to get a warning when you forget to specify an input file. Currently, the code just hangs and does not indicate that you have made a mistake.

[e-n-f]

In general, Unix programs read from the standard input when no input files are specified. Tippecanoe is no exception, and it is common to use it to read from a pipe. (There could be a warning if the standard input is a terminal, though.)

Tippecanoe is essentially unmaintaned by Mapbox now, so nothing is likely to change in any case.