Stopping kit import doesn't clear temporary files

[shivay-couchbase]

At the moment if you stop a kit import command in progress, the temporary files don't get automatically deleted. There should be an indicator for users to delete the temporary file being created.

[shivay-couchbase]

[amisevsk]

Currently, kit does not try to handle signals (pressing ctrl+c will sent SIGINT to the process), so when it encounters the signal it exits immediately. This prevents both doing any cleanup of files locally, but also printing any messages suggesting you should clean up manually.

We can catch and ignore signals, but I'm not sure it's a standard thing to do -- it could be annoying to have kit not exit immediately on SIGINT.

For what it's worth, we use temporary directories on all OSes for this process, so those files would be automatically deleted on restart.

[bmicklea]

Closing this as won't fix since the solution to fix it is potentially more cumbersome and annoying for users than the current situation. Because these files get cleaned up on restart the severity of the issue isn't very high.