trying to create a "|| failed" function

[TJ Luoma <luomat@gmail.com>]

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I'm trying to create a function which I can define in .zshenv which will
let me log when a command fails.

Here's what I end up doing most of the time:

LOG=$HOME/.foo.log

if ((! foo ))
then
 echo "$0: command 'foo' failed" | tee -a "$LOG"
 exit 1
fi



if ((! bar ))
then
 echo "$0: command 'bar' failed" | tee -a "$LOG"
 exit 1
fi


Here is what I'd like to be able to do instead

foo || failed

bar || failed

if 'failed' get called, I want the shell script (whatever called `foo` and
`bar`) to exit 1, and I want to log the name of the command that failed
(and, ideally, the name of the script that `foo` or `bar` was in when it
failed)

(These are simple examples, of course, but it gets more complicated when
`foo` or `bar` are longer commands, or part of a loop, etc.)

Is there a way to do this?

If so, I'd appreciate any hints suggestions, or examples you could give.

Thanks

TjL