#3402 set the exit code for single commands

[dyuri]

Attempt to fix #3402 .

$ touch file_exists
$ xonsh -c "rm file_exists"
$ _.rtn
0
$ xonsh -c "rm no_such_file"
/usr/bin/rm: cannot remove 'no_such_file': No such file or directory
$ _.rtn
1
$ xonsh -c "sys.exit(123)"
$ _.rtn
123

(But it still does not seem to fix the issue with Fugitive.)

[scopatz]

Thanks for putting this in @dyuri! Can you add a case or two here to the integration tests?

[dyuri]

Sure, on it.

[dyuri]

(I have no access to any windows machine so I've added @skip_if_on_windows for now.)

[scopatz]

Thanks! I think skipping windows makes sense for this feature. Also, can you please add a news item?

[dyuri]

News entry added.

[dyuri]

Sorry, I just noticed that on macOS ls returns 1 for non-existing entry (but I created the tests under linux where it returns 2). I'll replace it with something else.

[dyuri]

Ok, now it seems to be fine, for some reason the checks for this PR used the old code (?), but in my fork they are all OK now: https://github.com/dyuri/xonsh/actions/runs/186758594

[scopatz]

So I tried restarting and it didn't do anything. Maybe try merging from master?

[dyuri]

Yep, saw that, trying.

[scopatz]

Thanks!