[6.0] Where is the command app:name?

Problem

The app:name command, no longer available in laravel 6.0, there is some way to change the namespaces, as was being done with that command in all the necessary files.

Solution 

Go to the following link and follow the steps  (If link not working), code is present in below.

https://gist.github.com/isluewell/b824c0aef32f5007170fcd0d8498b657

First we create the command with

php artisan make:command AppName

Then we replace the content created in the file app/Console/Commands/AppName.php with the content of the gist.

and then use it in the usual way, changing "something" for the name of your application.

php artisan app:name <something> 

replace something with your required name...

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Composer;
use Symfony\Component\Finder\Finder;
use Illuminate\Filesystem\Filesystem;
use Symfony\Component\Console\Input\InputArgument;

class AppName extends Command
{
    /**
     * The console command name.
     *
     * @var string
     */
    protected $name = 'app:name';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Set the application namespace';

    /**
     * The Composer class instance.
     *
     * @var \Illuminate\Support\Composer
     */
    protected $composer;

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

    /**
     * Current root application namespace.
     *
     * @var string
     */
    protected $currentRoot;

    /**
     * Create a new key generator command.
     *
     * @param  \Illuminate\Support\Composer  $composer
     * @param  \Illuminate\Filesystem\Filesystem  $files
     * @return void
     */
    public function __construct(Composer $composer, Filesystem $files)
    {
        parent::__construct();

        $this->files = $files;
        $this->composer = $composer;
    }

    /**
     * Execute the console command.
     *
     * @return void
     */
    public function handle()
    {
        $this->currentRoot = trim($this->laravel->getNamespace(), '\\');

        $this->setAppDirectoryNamespace();
        $this->setBootstrapNamespaces();
        $this->setConfigNamespaces();
        $this->setComposerNamespace();
        $this->setDatabaseFactoryNamespaces();

        $this->info('Application namespace set!');

        $this->composer->dumpAutoloads();

        $this->call('optimize:clear');
    }

    /**
     * Set the namespace on the files in the app directory.
     *
     * @return void
     */
    protected function setAppDirectoryNamespace()
    {
        $files = Finder::create()
                            ->in($this->laravel['path'])
                            ->contains($this->currentRoot)
                            ->name('*.php');

        foreach ($files as $file) {
            $this->replaceNamespace($file->getRealPath());
        }
    }

    /**
     * Replace the App namespace at the given path.
     *
     * @param  string  $path
     * @return void
     */
    protected function replaceNamespace($path)
    {
        $search = [
            'namespace '.$this->currentRoot.';',
            $this->currentRoot.'\\',
        ];

        $replace = [
            'namespace '.$this->argument('name').';',
            $this->argument('name').'\\',
        ];

        $this->replaceIn($path, $search, $replace);
    }

    /**
     * Set the bootstrap namespaces.
     *
     * @return void
     */
    protected function setBootstrapNamespaces()
    {
        $search = [
            $this->currentRoot.'\\Http',
            $this->currentRoot.'\\Console',
            $this->currentRoot.'\\Exceptions',
        ];

        $replace = [
            $this->argument('name').'\\Http',
            $this->argument('name').'\\Console',
            $this->argument('name').'\\Exceptions',
        ];

        $this->replaceIn($this->getBootstrapPath(), $search, $replace);
    }

    /**
     * Set the namespace in the appropriate configuration files.
     *
     * @return void
     */
    protected function setConfigNamespaces()
    {
        $this->setAppConfigNamespaces();
        $this->setAuthConfigNamespace();
        $this->setServicesConfigNamespace();
    }

    /**
     * Set the application provider namespaces.
     *
     * @return void
     */
    protected function setAppConfigNamespaces()
    {
        $search = [
            $this->currentRoot.'\\Providers',
            $this->currentRoot.'\\Http\\Controllers\\',
        ];

        $replace = [
            $this->argument('name').'\\Providers',
            $this->argument('name').'\\Http\\Controllers\\',
        ];

        $this->replaceIn($this->getConfigPath('app'), $search, $replace);
    }

    /**
     * Set the authentication User namespace.
     *
     * @return void
     */
    protected function setAuthConfigNamespace()
    {
        $this->replaceIn(
            $this->getConfigPath('auth'),
            $this->currentRoot.'\\User',
            $this->argument('name').'\\User'
        );
    }

    /**
     * Set the services User namespace.
     *
     * @return void
     */
    protected function setServicesConfigNamespace()
    {
        $this->replaceIn(
            $this->getConfigPath('services'),
            $this->currentRoot.'\\User',
            $this->argument('name').'\\User'
        );
    }

    /**
     * Set the PSR-4 namespace in the Composer file.
     *
     * @return void
     */
    protected function setComposerNamespace()
    {
        $this->replaceIn(
            $this->getComposerPath(),
            str_replace('\\', '\\\\', $this->currentRoot).'\\\\',
            str_replace('\\', '\\\\', $this->argument('name')).'\\\\'
        );
    }

    /**
     * Set the namespace in database factory files.
     *
     * @return void
     */
    protected function setDatabaseFactoryNamespaces()
    {
        $files = Finder::create()
                            ->in(database_path('factories'))
                            ->contains($this->currentRoot)
                            ->name('*.php');

        foreach ($files as $file) {
            $this->replaceIn(
                $file->getRealPath(),
                $this->currentRoot, $this->argument('name')
            );
        }
    }

    /**
     * Replace the given string in the given file.
     *
     * @param  string  $path
     * @param  string|array  $search
     * @param  string|array  $replace
     * @return void
     */
    protected function replaceIn($path, $search, $replace)
    {
        if ($this->files->exists($path)) {
            $this->files->put($path, str_replace($search, $replace, $this->files->get($path)));
        }
    }

    /**
     * Get the path to the bootstrap/app.php file.
     *
     * @return string
     */
    protected function getBootstrapPath()
    {
        return $this->laravel->bootstrapPath().'/app.php';
    }

    /**
     * Get the path to the Composer.json file.
     *
     * @return string
     */
    protected function getComposerPath()
    {
        return base_path('composer.json');
    }

    /**
     * Get the path to the given configuration file.
     *
     * @param  string  $name
     * @return string
     */
    protected function getConfigPath($name)
    {
        return $this->laravel['path.config'].'/'.$name.'.php';
    }

    /**
     * Get the console command arguments.
     *
     * @return array
     */
    protected function getArguments()
    {
        return [
            ['name', InputArgument::REQUIRED, 'The desired namespace'],
        ];
    }
}