[10.x] Make the Schema Builder macroable (#49547)

* make the schema builder macroable

* stop passing the  parameter to the closure.

src/Illuminate/Database/Schema/Builder.php

@@ -5,11 +5,14 @@
 use Closure;
 use Illuminate\Container\Container;
 use Illuminate\Database\Connection;
+use Illuminate\Support\Traits\Macroable;
 use InvalidArgumentException;
 use LogicException;
 
 class Builder
 {
+    use Macroable;
+
     /**
      * The database connection instance.
      *

tests/Integration/Database/SchemaBuilderTest.php

@@ -384,4 +384,33 @@ public function testSystemVersionedTables()
 
         DB::statement('create table `test` (`foo` int) WITH system versioning;');
     }
+
+    public function testAddingMacros()
+    {
+        Schema::macro('foo', fn () => 'foo');
+
+        $this->assertEquals('foo', Schema::foo());
+
+        Schema::macro('hasForeignKeyForColumn', function (string $column, string $table, string $foreignTable) {
+            return collect(Schema::getForeignKeys($table))
+                ->contains(function (array $foreignKey) use ($column, $foreignTable) {
+                    return collect($foreignKey['columns'])->contains($column)
+                        && $foreignKey['foreign_table'] == $foreignTable;
+                });
+        });
+
+        Schema::create('questions', function (Blueprint $table) {
+            $table->id();
+            $table->string('body');
+        });
+
+        Schema::create('answers', function (Blueprint $table) {
+            $table->id();
+            $table->string('body');
+            $table->foreignId('question_id')->constrained();
+        });
+
+        $this->assertTrue(Schema::hasForeignKeyForColumn('question_id', 'answers', 'questions'));
+        $this->assertFalse(Schema::hasForeignKeyForColumn('body', 'answers', 'questions'));
+    }
 }