[help] Running bespoke functions on error before stopping

[rsangole]

Help

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Description

Is it possible to define a bespoke function that get's executed on an error within a targets pipeline, for example: "for this target, if an error occurs, run update_slack_thread_with_error(err) before stopping the targets pipeline" ?

Similar to what I'd do in the error and interrupt arguments when using a tryCatch() framework:

  tryCatch(
        expr = {
                # do stuff here...
                # ...
        },
        error = function(err) {
            update_slack_thread_with_error(err)
        },
        interrupt = function(intr) {
            update_slack_thread_with_error(intr)
        }
  )

[wlandau]

I have no plans to implement this directly in targets, but you can run a tryCatch() block in the command of your target or the custom function it calls.