Allow using cache on the project itself about php-cs-fixer HOT 2 OPEN

I've asked the same question on our chat 2 months ago 😅. In general, the way how cache is calculated now does not support development - after changes in the fixer(s), files defined in the finder won't be analysed again because config and files' content did not change. This would lead to situation where analysis' result would be wrong or --using-cache=no had to be passed all the time. That's why it is hard-disabled.

But I am going to leave this feature request open as I agree with it and this would be really helpful. It just requires different approach to calculating cache, that has to be discussed and implemented. It could be done by calculating hash for the content of all configured fixers - if it changes, all files should be analysed again. More complex version, that would support per-file/per-fixer cache info, so only modified fixer would be run against files, is rather not possible because of fixers' dependency graph (other fixers could probably modify file after changes done by modified fixer, but these wouldn't be run if they weren't modified too).

For those curious, check for the self-usage is done here.

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Since this issue has not had any activity within the last 90 days, I have marked it as stale.

The purpose of this action is to enforce backlog review once in a while. This is mostly for maintainers and helps with keeping repository in good condition, because stale issues and PRs can accumulate over time and make it harder for others to find relevant information. It is also possible that some changes has been made to the repo already, and issue or PR became outdated, but wasn't closed for some reason. This action helps with periodic review and closing of such stale items in automated way.

You may let maintainers handle this or verify current relevancy by yourself, to help with re-triage. Any activity will remove stale label so it won't be automatically closed at this point.

I will close it if no further activity occurs within the next 30 days.

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