Add support for AllowEmptyRun

[wernken-ng]

Adding support to AllowEmptyApply via flag -e
see the issue from #18

[polyrain]

If all we care about is the existence of the string, we might want to break the loop here and immediately return, ie

func Contains(s []string, str string) bool {
	for _, v := range s {
		if v == str {
			return true
		}
	}

	return false
}

[wernken-ng]

@polyrain thank you for your feedback, I will removing all these and you can refer to #38 (comment)

[polyrain]

We can probably drop this and replace it with something like:

if len(words)%2 != 0 && (slices.Contains(words, "-e") || slices.Contains(words, "--allow_empty_run")) { ... }

As of Go 1.21 this is now part of the standard library. Example: https://go.dev/play/p/cxVe9DRKfXQ

[davidwin93]

I think we can just drop this now since we check if there's any commands and then we also validate the flags https://github.com/zapier/tfbuddy/blob/main/pkg/comment_actions/parsing.go#L49. We should also update the unit test for this function to ensure that it works as expected wth valid and invalid flags passed.

[wernken-ng]

will remove this checking

[polyrain]

Looks good, minor comments

[davidwin93]

I think we can just drop this now since we check if there's any commands and then we also validate the flags https://github.com/zapier/tfbuddy/blob/main/pkg/comment_actions/parsing.go#L49. We should also update the unit test for this function to ensure that it works as expected wth valid and invalid flags passed.