There is no way to accomplish this. In the general case, diffs may be uploaded without any context. In these cases, we can't test against unmodified content which simply appears elsewhere in the file.

What's your use case?

We have certain objects that are financially sensitive, so whenever a diff is submitted and the file (either the old or new version) contains a reference to one of those objects, we would like to add a blocking reviewer. This reviewer would then go through the details of the diff and ensure that all appropriate documentation is present for compliance auditing.

The reason I would want this rule to fire when content of the files contain the keyword as opposed to just when the changed content contains the keyboard is because an object may be reference by a variable and that variable name could be any number of things.

I imagine that there are many similar uses cases out there by others. A business process could require that additional reviewers be added to a diff when the existing or changing file content contains a specific keyword (or set of keywords).

If I have something like

FinaciallySenstiveObject fsb = new FinaciallySenstiveObject();
fsb.Amount = 1000;

And in a diff, only line 2 is modified.

fsb.Amount = 2000;

Then I would want to easily set up rules that says, whenever file contains FinaciallySenstiveObject then add blocking reviewer: "financial auditor".

◀ Merged tasks: T5983.

There's no technical barrier to implementing this, it just won't work some of the time since we don't have the context. I'm generally a bit skeptical about the value of these rules, but reasonable use cases aren't totally unthinkable. T5029 may make it practical more of the time.