Ability to cancel Fetching

[toshi0383]

Since somewhat version, I see Carthage introduced parallel fetching.
It's great, but control + C doesn't cancel these asynchronous tasks.
It should be cancellable.

[ikesyo]

Looks like this is due to Carthage/ReactiveTask#3.

[toshi0383]

NSTask🙃

[BobElDevil]

I ran into this same issue in a library I wrote for myself. The solution wasn't pretty, but it got the job done. It was 2 items:

1. Add a signal listener to the parent process (i.e., reactive task), and whenever it receives a signal that, send it to any active child pids as well.
2. To cover the case where the signals aren't able to be forwarded (crash, SIGKILL), spawn a tiny binary that takes as input the parent and child pid, and if the parent pid disappears, it kills the child

The best solution is probably reimplementing the task with fork/exec, but the above would be a simpler stop-gap, if desired

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ikesyo]

Reopening this as an enhancement.