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Editing:Starter.php

<?php

declare(strict_types=1);

namespace Laravel\Pao\Drivers\Phpstan;

use Laravel\Pao\Drivers\Starter as BaseStarter;
use Laravel\Pao\UserFilters\CaptureFilter;

/**
 * @internal
 *
 * @codeCoverageIgnore
 */
final class Starter extends BaseStarter
{
    public function name(): string
    {
        return 'phpstan';
    }

public function start(): void
    {
        $this->registerNullFilter();
        $this->silenceStderr();

/** @var array<int, string> $argv */
        $argv = $_SERVER['argv'];
        $argv = $this->ensureErrorFormatJson($argv);
        $argv = $this->ensureNoProgress($argv);
        $_SERVER['argv'] = $argv;

$this->silenceStdout();
    }

/**
     * @return array<string, mixed>|null
     */
    public function parse(): ?array
    {
        $captured = trim(CaptureFilter::output());

CaptureFilter::reset();

if ($captured === '') {
            return null;
        }

$start = strpos($captured, '{');

if ($start !== false && $start > 0) {
            $captured = substr($captured, $start);
        }

/** @var array<string, mixed>|null $data */
        $data = json_decode($captured, associative: true);

if (! is_array($data) || ! isset($data['totals'])) {
            return null;
        }

/** @var array<string, list<array{line: int, message: string, identifier: string, ignorable?: bool, tip?: string}>> $errorDetails */
        $errorDetails = [];
        $totalFileErrors = 0;

/** @var array<string, array{errors: int, messages: list<array{message: string, line: int, identifier?: string, ignorable?: bool, tip?: string}>}> $files */
        $files = is_array($data['files'] ?? null) ? $data['files'] : [];

foreach ($files as $file => $fileData) {
            foreach ($fileData['messages'] as $message) {
                $totalFileErrors++;

$detail = [
                    'line' => $message['line'],
                    'message' => $message['message'],
                    'identifier' => $message['identifier'] ?? 'unknown',
                ];

if (isset($message['ignorable']) && $message['ignorable'] === false) {
                    $detail['ignorable'] = false;
                }

if (isset($message['tip']) && $message['tip'] !== '') {
                    $detail['tip'] = $message['tip'];
                }

$errorDetails[$file][] = $detail;
            }
        }

/** @var list<string> $errors */
        $errors = is_array($data['errors'] ?? null) ? $data['errors'] : [];

/** @var list<string> $generalErrors */
        $generalErrors = array_values(array_filter($errors, static fn (string $error): bool => $error !== ''));

$totalErrors = $totalFileErrors + count($generalErrors);

/** @var array<string, mixed> $result */
        $result = [
            'result' => $totalErrors > 0 ? 'failed' : 'passed',
            'errors' => $totalErrors,
        ];

if ($errorDetails !== []) {
            $verbose = $this->isVerbose();
            $limit = 30;

if (! $verbose && $totalFileErrors > $limit) {
                $result['error_details'] = $this->truncateGrouped($errorDetails, $limit);
                $result['truncated'] = true;
                $result['hint'] = 'Pass -v to see all errors.';
            } else {
                $result['error_details'] = $errorDetails;
            }

$result['instructions'] = $this->agentInstructions();
        }

if ($generalErrors !== []) {
            $result['general_errors'] = $generalErrors;
        }

return $result;
    }

private function agentInstructions(): string
    {
        return <<<'TXT'
            Each error has an associated identifier, like `argument.type` or `return.missing`. Each error identifier has documentation at URL https://phpstan.org/error-identifiers/<identifier>, which contains a code example, explanation why it is an error, and instructions on how to fix it. Before fixing the error, fetch the documentation page for its identifier. The error usually indicates a real bug or incorrect type in the code. Fix the underlying cause, do not just make the error go away. Do not add `@phpstan-ignore` comments, `@phpstan-ignore-next-line` comments, or baseline entries to suppress the error. Do not use assert() or inline @var PHPDoc tag to override PHPStan's inferred type. Do not add type casts just to silence errors. Do not widen parameter or return types just to make the error go away.
            TXT;
    }

/**
     * @param  array<string, list<array{line: int, message: string, identifier: string, ignorable?: bool, tip?: string}>>  $grouped
     * @return array<string, list<array{line: int, message: string, identifier: string, ignorable?: bool, tip?: string}>>
     */
    private function truncateGrouped(array $grouped, int $limit): array
    {
        $result = [];
        $count = 0;

foreach ($grouped as $file => $errors) {
            foreach ($errors as $error) {
                if ($count >= $limit) {
                    break 2;
                }

$result[$file][] = $error;
                $count++;
            }
        }

return $result;
    }

private function isVerbose(): bool
    {
        /** @var array<int, string> $argv */
        $argv = $_SERVER['argv'] ?? [];

foreach ($argv as $arg) {
            if (in_array($arg, ['-v', '-vv', '-vvv', '--verbose'], true)) {
                return true;
            }
        }

return false;
    }

/**
     * @param  array<int, string>  $argv
     * @return array<int, string>
     */
    private function ensureErrorFormatJson(array $argv): array
    {
        $filtered = [];
        $skipNext = false;

foreach ($argv as $arg) {
            if ($skipNext) {
                $skipNext = false;

continue;
            }

if (str_starts_with($arg, '--error-format=')) {
                continue;
            }

if ($arg === '--error-format') {
                $skipNext = true;

continue;
            }

$filtered[] = $arg;
        }

$filtered[] = '--error-format=json';

return $filtered;
    }

/**
     * @param  array<int, string>  $argv
     * @return array<int, string>
     */
    private function ensureNoProgress(array $argv): array
    {
        if (! in_array('--no-progress', $argv, true)) {
            $argv[] = '--no-progress';
        }

return $argv;
    }
}

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Editing:Starter.php