[0.x] Adds support for specifying custom rules in pint.json

[lukeraymonddowning]

Hello there!

It would be nice in Pint if you were able to reference custom fixers for rules that aren't built into the package by default. This PR adds that functionality by allowing a developer to register a fixers array in their pint.json file.

{
    "fixers": [
        "App\\Fixers\\MyFixer"
    ]
}

The fixers array should contain FQCNs of FixerInterface classes. Pint will look these up when building the config, and automatically set them to true in the rules array.

A user may override rules if they wish by specifying the fixer name in the rules config:

{
    "fixers": [
        "App\\Fixers\\MyFixer"
    ],
    "rules": {
        "App/My_Fixer": {
            "some_custom_config": true
        }
    }
}

This allows for passing more specific arguments if the custom rule accepts them.

[Jubeki]

I think your custom fixers will not be loaded, because Pint is standalone and should not be loading your composer autoload file. Or am I wrong there?

[lukeraymonddowning]

Lol @Jubeki good point 😁 Need to think of a way around that. Any suggestions?

[lukeraymonddowning]

Converting to draft until I solve the Elephant in the room

[nunomaduro]

@lukeraymonddowning You may be able to "require" the file. Yet, for now, we plan allow custom rules. Maybe in the future!