More fine grained control over file overwriting

[gossi]

Builder stays in control which files can be overwritten (depending on the builder). Given the following scenario, that a generator contains two builders, one allows overwriting the other prohibits it. There is no chance of realizing this with the current apporach. With the 'guard' operator, the generator can only set everything to non-overwriting, while individual builders will deny this behavior change.

[cedriclombardot]

Hum ! My problem is the main idea of overwrite for builder is to force régénération of cache when your in a dev mode. I m not sure is the good check perhaps allow a new one in builder will be better ?

[gossi]

Thanks, I do understand the opposite of it :) However, it is still possible to achieve both, by add sealing to properties. I will work on some code later and update my pull request that satisfies both of us :)

[gossi]

here we go, simply seal the properties that you don't want to be overridden from the generator and builders stay in control over their own configuration.