Add a debug ignore by regex command

[theofidry]

Sometimes especially when dealing with regexes, you find yourself to debug why it is not working. You check your regex against the assumed subject and see that it works but somehow applied to your application config it doesn't because there is more things going on: the regex is slightly altered by the app or the subject is not what you expect it to be.

I had this issue several times with PHP-Scoper (you can exclude/expose symbols based on a regex) and eventually I created the inspect-symbols command which allows to check the result.

I find myself in the exact same situation with infection with the ignoreByRegex configs and just end up putting a breakpoint and debug why it is not working. I think a command could help here.

WDYT?

[sanmai]

I don't know if you had to ignore a lot of mutations, but if that's just one or two it might be easier to use @infection-ignore-all.

[theofidry]

Hm at least for the case at hand I preferred to keep it at the mutator level: it was a pretty specific case.

But either way, you may end up with the same problem with @infection-ignore-all 😄