<?php

declare(strict_types=1);

/*

* This file is part of the ALTO library.

*

* © 2025–present Simon André

*

* For full copyright and license information, please see

* the LICENSE file distributed with this source code.

*/

require __DIR__.'/../../vendor/autoload.php';

use Alto\Code\Diff\Diff;

use Alto\Code\Diff\Model\DiffBundle;

use Alto\Code\Diff\Model\DiffFile;

use Alto\Code\Diff\Patch\UnifiedEmitter;

use Alto\Code\Diff\Patch\UnifiedParser;

echo "=== 1. Parse Git Diff Output ===\n";

$gitDiff = <<< 'DIFF'

diff --git a/src/App.php b/src/App.php

index 83a4c02..4c3b2f9 100644

--- a/src/App.php

+++ b/src/App.php

@@ -10,4 +10,4 @@

public function run()

{

- return 'foo';

+ return 'bar';

}

}

DIFF;

$parser = new UnifiedParser();

$bundle = $parser->parse($gitDiff);

foreach ($bundle->files() as $file) {

echo "Changed: {$file->oldPath}\n";

if (isset($file->headers['index'])) {

echo " Index: {$file->headers['index']}\n";

}

echo ' Hunks: '.count($file->result->hunks())."\n";

}

echo "\n=== 2. Generate Git-Compatible Patch ===\n";

$old = 'function test() { return false; }';

$new = 'function test() { return true; }';

$result = Diff::build()->compare($old, $new);

$headers = [

'diff' => 'diff --git a/file.txt b/file.txt',

'index' => 'index abc123..def456 100644',

];

$file = new DiffFile('file.txt', 'file.txt', $result, $headers);

$bundle = new DiffBundle([$file]);

$emitter = new UnifiedEmitter();

echo $emitter->emit($bundle)."\n";