[Downgrade PHP 7.3] Trailing commas in function calls

config/set/downgrade-php73.php

@@ -4,6 +4,7 @@
 
 use Rector\Downgrade\Rector\LNumber\ChangePhpVersionInPlatformCheckRector;
 use Rector\DowngradePhp73\Rector\List_\DowngradeListReferenceAssignmentRector;
+use Rector\DowngradePhp73\Rector\FuncCall\DowngradeTrailingCommasInFunctionCallsRector;
 use Rector\DowngradePhp73\Rector\String_\DowngradeFlexibleHeredocSyntaxRector;
 use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
 
@@ -15,4 +16,5 @@
         ->call('configure', [[
             ChangePhpVersionInPlatformCheckRector::TARGET_PHP_VERSION => 70300,
         ]]);
+    $services->set(DowngradeTrailingCommasInFunctionCallsRector::class);
 };

packages/node-type-resolver/src/Node/AttributeKey.php

@@ -227,4 +227,9 @@ final class AttributeKey
      * @var string
      */
     public const IS_FRESH_NODE = 'is_fresh_node';
+
+    /**
+     * @var string
+     */
+    public const  TRAILING_COMMA = 'trailing_comma';
 }

rules/downgrade-php73/src/Rector/FuncCall/DowngradeTrailingCommasInFunctionCallsRector.php

@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp73\Rector\FuncCall;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\FuncCall;
+use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Expr\StaticCall;
+use Rector\Core\Rector\AbstractRector;
+use Rector\NodeTypeResolver\Node\AttributeKey;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+/**
+ * @see \Rector\DowngradePhp73\Tests\Rector\FuncCall\DowngradeTrailingCommasInFunctionCallsRector\DowngradeTrailingCommasInFunctionCallsRectorTest
+ */
+final class DowngradeTrailingCommasInFunctionCallsRector extends AbstractRector
+{
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition(
+            'Remove trailing commas in function calls', [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+class SomeClass
+{
+    public function __construct(string $value)
+    {
+        $compacted = compact(
+            'posts',
+            'units',
+        );
+    }
+}
+CODE_SAMPLE
+                    , <<<'CODE_SAMPLE'
+class SomeClass
+{
+    public function __construct(string $value)
+    {
+        $compacted = compact(
+            'posts',
+            'units'
+        );
+    }
+}
+CODE_SAMPLE
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getNodeTypes(): array
+    {
+        return [FuncCall::class, MethodCall::class, StaticCall::class];
+    }
+
+    public function refactor(Node $node): ?Node
+    {
+        if($node->args){
+            $node->setAttribute(AttributeKey::ORIGINAL_NODE, null);
+            $last = $node->args[array_key_last($node->args)];
+            $last->setAttribute(AttributeKey::TRAILING_COMMA, false);
+        }
+        return $node;
+    }
+}

rules/downgrade-php73/tests/Rector/FuncCall/DowngradeTrailingCommasInFunctionCallsRector/DowngradeTrailingCommasInFunctionCallsRectorTest.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp73\Tests\Rector\FuncCall\DowngradeTrailingCommasInFunctionCallsRector;
+
+use Iterator;
+use Rector\DowngradePhp73\Rector\FuncCall\DowngradeTrailingCommasInFunctionCallsRector;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class DowngradeTrailingCommasInFunctionCallsRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @requires PHP >= 7.3
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    protected function getRectorClass(): string
+    {
+        return DowngradeTrailingCommasInFunctionCallsRector::class;
+    }
+}

rules/downgrade-php73/tests/Rector/FuncCall/DowngradeTrailingCommasInFunctionCallsRector/Fixture/fixture.php.inc

@@ -0,0 +1,37 @@
+<?php
+
+namespace Rector\DowngradePhp73\Tests\Rector\FuncCall\DowngradeTrailingCommasInFunctionCallsRector\Fixture;
+
+class FixtureClass
+{
+    public function run()
+    {
+        compact('posts','units',);
+        $this->setData('posts','units',);
+        self::run('posts','units',);
+        self::run('posts',
+                  'units',);
+        $this->setOnClick("[Zip ID: {$modelid}]  {$e->getMessage($modelId,)}",);
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\DowngradePhp73\Tests\Rector\FuncCall\DowngradeTrailingCommasInFunctionCallsRector\Fixture;
+
+class FixtureClass
+{
+    public function run()
+    {
+        compact('posts', 'units');
+        $this->setData('posts', 'units');
+        self::run('posts', 'units');
+        self::run('posts',
+                  'units');
+        $this->setOnClick("[Zip ID: {$modelid}]  {$e->getMessage($modelId)}");
+    }
+}
+
+?>

src/PhpParser/Printer/BetterStandardPrinter.php

@@ -590,4 +590,20 @@ private function wrapValueWith(String_ $string, string $wrap): string
     {
         return $wrap . $string->value . $wrap;
     }
+
+    protected function pCommaSeparated(array $nodes): string
+    {
+        $result = parent::pCommaSeparated($nodes);
+
+        $last = end($nodes);
+
+        if ($last instanceof Node) {
+            $trailingComma = $last->getAttribute(AttributeKey::TRAILING_COMMA);
+            if ($trailingComma === false) {
+                $result = rtrim($result, ',');
+            }
+        }
+
+        return $result;
+    }
 }