vendor/illuminate/database/Migrations/MigrationCreator.php

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<?php

namespace Illuminate\Database\Migrations;

use Closure;
use Illuminate\Support\Str;
use InvalidArgumentException;
use Illuminate\Filesystem\Filesystem;

class MigrationCreator
{
    /**
     * The filesystem instance.
     *
     * @var \Illuminate\Filesystem\Filesystem
     */
    protected $files;

    /**
     * The registered post create hooks.
     *
     * @var array
     */
    protected $postCreate = [];

    /**
     * Create a new migration creator instance.
     *
     * @param  \Illuminate\Filesystem\Filesystem  $files
     * @return void
     */
    public function __construct(Filesystem $files)
    {
        $this->files = $files;
    }

    /**
     * Create a new migration at the given path.
     *
     * @param  string  $name
     * @param  string  $path
     * @param  string|null  $table
     * @param  bool    $create
     * @return string
     *
     * @throws \Exception
     */
    public function create($name, $path, $table = null, $create = false)
    {
        $this->ensureMigrationDoesntAlreadyExist($name);

        // First we will get the stub file for the migration, which serves as a type
        // of template for the migration. Once we have those we will populate the
        // various place-holders, save the file, and run the post create event.
        $stub = $this->getStub($table, $create);

        $this->files->put(
            $path = $this->getPath($name, $path),
            $this->populateStub($name, $stub, $table)
        );