Add PHPStan extension for macros

[spawnia]

Resolves #1846

Just threw together a WIP (nothing works atm), taking parts from larastan/larastan#301 and Larastan.

@kylekatarnls is this the direction you want this to go?

[kylekatarnls]

Yep, that's the idea. Thanks a lot. 🥇

[spawnia]

@kylekatarnls i am not too familiar with the inner workings of PHPStan, this is taking me longer than i thought.

There is a whole bunch of abstractions in Larastan that seem unnecessary for us, i tried to strip them away to keep the code as simple as it can be.

Can you take a look and see if you can work with what i have so far? I got the test to a point where it produces usable output, at least.

[kylekatarnls]

I had some tries but's it's indeed a bit more difficult than I expected. I postpone this for version 2.27.

[codecov-commenter]

Codecov Report

Merging #1916 into master will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##              master     #1916   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity      1994      2027   +33     
===========================================
  Files            883       885    +2     
  Lines           8836      8899   +63     
===========================================
+ Hits            8836      8899   +63     

Impacted Files	Coverage Δ	Complexity Δ
src/Carbon/CarbonInterval.php	100.00% <ø> (ø)	385.00 <0.00> (ø)
src/Carbon/Traits/Creator.php	100.00% <ø> (ø)	118.00 <0.00> (ø)
src/Carbon/Traits/Localization.php	100.00% <ø> (ø)	128.00 <0.00> (ø)
src/Carbon/Traits/Macro.php	100.00% <ø> (ø)	10.00 <0.00> (ø)
src/Carbon/Traits/Mixin.php	100.00% <ø> (ø)	17.00 <0.00> (ø)
src/Carbon/Traits/Modifiers.php	100.00% <ø> (ø)	47.00 <0.00> (ø)
src/Carbon/Traits/Serialization.php	100.00% <ø> (ø)	20.00 <0.00> (ø)
src/Carbon/Traits/Week.php	100.00% <ø> (ø)	20.00 <0.00> (ø)
src/Carbon/CarbonPeriod.php	100.00% <100.00%> (ø)	317.00 <0.00> (ø)
src/Carbon/PHPStan/Macro.php	100.00% <100.00%> (ø)	30.00 <30.00> (?)
... and 3 more

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[kylekatarnls]

This extension is ready to be tested:

Require this branch in an app using:

composer require nesbot/carbon:dev-phpstan

Require phpstan + extension-installer:

composer require --dev phpstan/phpstan phpstan/extension-installer

And finally, add the file loading your macros and mixins in the bootstrapFiles list of phpstan.neon:

parameters:
    bootstrapFiles:
        - config/bootstrap.php

[spawnia]

Awesome work @kylekatarnls, i tested according to your suggestion. Works perfectly.