[Experiment] Use composer.json as priority, fallback to php version features on when parameter exists on ComposerJsonPhpVersionResolver

[samsonasik]

Ref #6261 (review)

[samsonasik]

implemented 🎉, here the summary:

This PR provide a way to set withPhpVersion() even composer.json not exists or doesn't define "php" config, so it fallback php version feature defined, with priority:

1. read composer.json, if exists and define "php" config, then use it
2. verify if it has Option::PHP_VERSION_FEATURES via withPhpVersion(), if exists, then use it as fallback
3. throw error because nothing to rely

The config can be:

use Rector\Config\RectorConfig;
use Rector\ValueObject\PhpVersionFeature;

return RectorConfig::configure()
    ->withPaths([__DIR__ . '/src'])
    ->withPhpVersion(PhpVersionFeature::ATTRIBUTES)
    ->withPhpLevel(2);

I add e2e test on this PR for proof that it works for apply on level 2, but current php version is php 8, which only apply php 5.2 change:

-ldap_first_attribute($ldap, $entry, $more);
+ldap_first_attribute($ldap, $entry);

By this PR, I found a bug duplicated ContinueToBreakInSwitchRector register which registered in php52 and php73 config 06026a0

I will create separate PR to remove duplicated register ContinueToBreakInSwitchRector

[samsonasik]

I created separate PR to remove duplicated register ContinueToBreakInSwitchRector that exists in both php52 and php73 config

• Fix duplicated register ContinueToBreakInSwitchRector in php52.php and php73.php #6385

[samsonasik]

it should show RemoveFuncCallArgRector per php 5.2 config set, but it shows RemoveExtraParametersRector on php 7.1 set, it probably due to array_merge() config so configured config is late instead of added, that's seems needs separate PR for that.

[samsonasik]

this not transformed to readonly class even with PHP_INT_MAX on level, as I define

->withPhpVersion(PhpVersionFeature::ATTRIBUTES)

on rector.php e2e test https://github.com/rectorphp/rector-src/pull/6384/files#diff-464b8708ccfbbbeecb99d3dc19bea3998a6d55af99232759e70edae715f3abf0 so it only apply up to php 8.0 feature.

[samsonasik]

it exists already in php52 config set, I removed it to avoid duplicated error message.

cd e2e/with-php-level && composer install
with-php-level git:(experiment-use-composer-json-priority-fallback) ✗ php ../e2eTestRunner.php
    ---------- begin diff ----------
@@ @@
-[ERROR] Following rules are registered twice: Rector\Php52\Rector\Switch_\ContinueToBreakInSwitchRector

removed in separate PR:

• Fix duplicated register ContinueToBreakInSwitchRector in php52.php and php73.php #6385

[samsonasik]

All checks have passed 🎉 @TomasVotruba it is ready for review.

I don't rebase cherry-pick patch #6385 so you can see the process and how it found a bug with e2e test :)

[samsonasik]

empty composer.json on purpose so withPhpVersion() can act as fallback