Generate Policies & Models (if not created yet) from AuthServiceProvider's mapped Policies.

PolicyGeneratorCommand.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider;
use Illuminate\Support\Str;

class PolicyGenerateCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'policy:generate';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Generate Policies & Models from AuthServiceProvider\'s mapped Policies.';

    /**
     * Execute the console command.
     *
     * @return int
     */
    public function handle()
    {
        $providers = $this->laravel->getProviders(AuthServiceProvider::class);

        foreach ($providers as $provider) {
            foreach ($provider->policies() as $model => $policy) {
                $this->makeModelAndPolicy($model, $policy);
            }
        }
    }

    protected function makeModelAndPolicy($model, $policy)
    {
        if (!Str::contains($model, '\\')) {
            return;
        }

        $this->call('make:model', ['name' => $model]);

        $this->makePolicy($model, $policy);
    }

    protected function makePolicy($model, $policy)
    {
        $policy = preg_replace('/@.+$/', '', $policy);

        $this->call('make:policy', array_filter(
            ['name' => $policy, '--model' => $model]
        ));
    }
}