Try pcov for code coverage

[staabm]

Similar to #2576

Related article from the same source.. lets try

https://kizu514.com/blog/pcov-is-better-than-phpdbg-and-xdebug-for-code-coverage/
https://github.com/krakjoe/pcov

[staabm]

What do you think about moving the simple checks to GithubAction so overall build-time can be reduced? (Less sequential tasks)

[TomasVotruba]

What do you think about moving the simple checks to GithubAction so overall build-time can be reduced? (Less sequential tasks)

I haven't used them yet. PR prototype would help

[staabm]

Remaining failures seem unrelated

[TomasVotruba]

Indeed. Thanks 👍

[TomasVotruba]

The coverage just dropped by 4 %

https://coveralls.io/github/rectorphp/rector?branch=master

That's way too much for 1 min improvements on parallel Travis run.

We'll need to revert

[staabm]

Imo the coverage did not actually change but pcov treats some details differenz and therefore leads to a different number

[TomasVotruba]

The number changed for much worse. If that would be ~0,5 % than it's ok.
But this might be seriously missleading. Someone might try to fix coverage locally for something that's already covered. 4 % is a lot

I'd rather stay closer to original xdebug coverage, as we'll probably get back to it in 2.9

Thanks for you work though. I wish I noticed the number before